Remove managed_page_count_lock spinlock and instead use atomic variables. Suggested-by: Michal Hocko <mhocko@xxxxxxxx> Suggested-by: Vlastimil Babka <vbabka@xxxxxxx> Signed-off-by: Arun KS <arunks@xxxxxxxxxxxxxx> --- As discussed here, https://patchwork.kernel.org/patch/10627521/#22261253 --- --- arch/csky/mm/init.c | 4 +- arch/powerpc/platforms/pseries/cmm.c | 11 ++-- arch/s390/mm/init.c | 2 +- arch/um/kernel/mem.c | 4 +- arch/x86/kernel/cpu/microcode/core.c | 5 +- drivers/char/agp/backend.c | 4 +- drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 2 +- drivers/gpu/drm/i915/i915_gem.c | 2 +- drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 4 +- drivers/hv/hv_balloon.c | 19 +++---- drivers/md/dm-bufio.c | 5 +- drivers/md/dm-crypt.c | 4 +- drivers/md/dm-integrity.c | 4 +- drivers/md/dm-stats.c | 3 +- drivers/media/platform/mtk-vpu/mtk_vpu.c | 3 +- drivers/misc/vmw_balloon.c | 2 +- drivers/parisc/ccio-dma.c | 5 +- drivers/parisc/sba_iommu.c | 5 +- drivers/staging/android/ion/ion_system_heap.c | 2 +- drivers/xen/xen-selfballoon.c | 7 +-- fs/ceph/super.h | 3 +- fs/file_table.c | 9 ++-- fs/fuse/inode.c | 4 +- fs/nfs/write.c | 3 +- fs/nfsd/nfscache.c | 3 +- fs/ntfs/malloc.h | 2 +- fs/proc/base.c | 3 +- include/linux/highmem.h | 2 +- include/linux/mm.h | 2 +- include/linux/mmzone.h | 10 +--- include/linux/swap.h | 2 +- kernel/fork.c | 6 +-- kernel/kexec_core.c | 5 +- kernel/power/snapshot.c | 2 +- lib/show_mem.c | 3 +- mm/highmem.c | 2 +- mm/huge_memory.c | 2 +- mm/kasan/quarantine.c | 4 +- mm/memblock.c | 6 +-- mm/memory_hotplug.c | 4 +- mm/mm_init.c | 3 +- mm/oom_kill.c | 2 +- mm/page_alloc.c | 75 ++++++++++++++------------- mm/shmem.c | 12 +++-- mm/slab.c | 3 +- mm/swap.c | 3 +- mm/util.c | 2 +- mm/vmalloc.c | 4 +- mm/vmstat.c | 4 +- mm/workingset.c | 2 +- mm/zswap.c | 2 +- net/dccp/proto.c | 6 +-- net/decnet/dn_route.c | 2 +- net/ipv4/tcp_metrics.c | 2 +- net/netfilter/nf_conntrack_core.c | 6 +-- net/netfilter/xt_hashlimit.c | 4 +- net/sctp/protocol.c | 6 +-- security/integrity/ima/ima_kexec.c | 2 +- 58 files changed, 171 insertions(+), 143 deletions(-) diff --git a/arch/csky/mm/init.c b/arch/csky/mm/init.c index dc07c07..3f4d35e 100644 --- a/arch/csky/mm/init.c +++ b/arch/csky/mm/init.c @@ -71,7 +71,7 @@ void free_initrd_mem(unsigned long start, unsigned long end) ClearPageReserved(virt_to_page(start)); init_page_count(virt_to_page(start)); free_page(start); - totalram_pages++; + atomic_long_inc(&totalram_pages); } } #endif @@ -88,7 +88,7 @@ void free_initmem(void) ClearPageReserved(virt_to_page(addr)); init_page_count(virt_to_page(addr)); free_page(addr); - totalram_pages++; + atomic_long_inc(&totalram_pages); addr += PAGE_SIZE; } diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/pseries/cmm.c index 25427a4..85fe503 100644 --- a/arch/powerpc/platforms/pseries/cmm.c +++ b/arch/powerpc/platforms/pseries/cmm.c @@ -208,7 +208,7 @@ static long cmm_alloc_pages(long nr) pa->page[pa->index++] = addr; loaned_pages++; - totalram_pages--; + atomic_long_dec(&totalram_pages); spin_unlock(&cmm_lock); nr--; } @@ -247,7 +247,7 @@ static long cmm_free_pages(long nr) free_page(addr); loaned_pages--; nr--; - totalram_pages++; + atomic_long_inc(&totalram_pages); } spin_unlock(&cmm_lock); cmm_dbg("End request with %ld pages unfulfilled\n", nr); @@ -291,7 +291,8 @@ static void cmm_get_mpp(void) int rc; struct hvcall_mpp_data mpp_data; signed long active_pages_target, page_loan_request, target; - signed long total_pages = totalram_pages + loaned_pages; + signed long total_pages = atomic_long_read(&totalram_pages) + + loaned_pages; signed long min_mem_pages = (min_mem_mb * 1024 * 1024) / PAGE_SIZE; rc = h_get_mpp(&mpp_data); @@ -322,7 +323,7 @@ static void cmm_get_mpp(void) cmm_dbg("delta = %ld, loaned = %lu, target = %lu, oom = %lu, totalram = %lu\n", page_loan_request, loaned_pages, loaned_pages_target, - oom_freed_pages, totalram_pages); + oom_freed_pages, atomic_long_read(&totalram_pages)); } static struct notifier_block cmm_oom_nb = { @@ -581,7 +582,7 @@ static int cmm_mem_going_offline(void *arg) free_page(pa_curr->page[idx]); freed++; loaned_pages--; - totalram_pages++; + atomic_long_inc(&totalram_pages); pa_curr->page[idx] = pa_last->page[--pa_last->index]; if (pa_last->index == 0) { if (pa_curr == pa_last) diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index 76d0708..d6529e8 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -59,7 +59,7 @@ static void __init setup_zero_pages(void) order = 7; /* Limit number of empty zero pages for small memory sizes */ - while (order > 2 && (totalram_pages >> 10) < (1UL << order)) + while (order > 2 && (atomic_long_read(&totalram_pages) >> 10) < (1UL << order)) order--; empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, order); diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c index 1067469..da78a06 100644 --- a/arch/um/kernel/mem.c +++ b/arch/um/kernel/mem.c @@ -51,8 +51,8 @@ void __init mem_init(void) /* this will put all low memory onto the freelists */ memblock_free_all(); - max_low_pfn = totalram_pages; - max_pfn = totalram_pages; + max_low_pfn = atomic_long_read(&totalram_pages); + max_pfn = atomic_long_read(&totalram_pages); mem_init_print_info(NULL); kmalloc_ok = 1; } diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c index 2637ff0..4ccc8dd 100644 --- a/arch/x86/kernel/cpu/microcode/core.c +++ b/arch/x86/kernel/cpu/microcode/core.c @@ -435,8 +435,9 @@ static ssize_t microcode_write(struct file *file, const char __user *buf, { ssize_t ret = -EINVAL; - if ((len >> PAGE_SHIFT) > totalram_pages) { - pr_err("too much data (max %ld pages)\n", totalram_pages); + if ((len >> PAGE_SHIFT) > atomic_long_read(&totalram_pages)) { + pr_err("too much data (max %ld pages)\n", + atomic_long_read(&totalram_pages)); return ret; } diff --git a/drivers/char/agp/backend.c b/drivers/char/agp/backend.c index 38ffb28..2753e1d 100644 --- a/drivers/char/agp/backend.c +++ b/drivers/char/agp/backend.c @@ -115,9 +115,9 @@ static int agp_find_max(void) long memory, index, result; #if PAGE_SHIFT < 20 - memory = totalram_pages >> (20 - PAGE_SHIFT); + memory = atomic_long_read(&totalram_pages) >> (20 - PAGE_SHIFT); #else - memory = totalram_pages << (PAGE_SHIFT - 20); + memory = atomic_long_read(&totalram_pages) << (PAGE_SHIFT - 20); #endif index = 1; diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c index 56412b0..ca18502 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c @@ -848,7 +848,7 @@ static int kfd_fill_mem_info_for_cpu(int numa_node_id, int *avail_size, */ pgdat = NODE_DATA(numa_node_id); for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++) - mem_in_bytes += pgdat->node_zones[zone_type].managed_pages; + mem_in_bytes += atomic_long_read(&pgdat->node_zones[zone_type].managed_pages); mem_in_bytes <<= PAGE_SHIFT; sub_type_hdr->length_low = lower_32_bits(mem_in_bytes); diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 0c8aa57..b4c245b 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2539,7 +2539,7 @@ static int i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj) * If there's no chance of allocating enough pages for the whole * object, bail early. */ - if (page_count > totalram_pages) + if (page_count > atomic_long_read(&totalram_pages)) return -ENOMEM; st = kmalloc(sizeof(*st), GFP_KERNEL); diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c index 8e2e269..9ea10eb 100644 --- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c @@ -170,7 +170,7 @@ static int igt_ppgtt_alloc(void *arg) * This should ensure that we do not run into the oomkiller during * the test and take down the machine wilfully. */ - limit = totalram_pages << PAGE_SHIFT; + limit = atomic_long_read(&totalram_pages) << PAGE_SHIFT; limit = min(ppgtt->vm.total, limit); /* Check we can allocate the entire range */ @@ -1244,7 +1244,7 @@ static int exercise_mock(struct drm_i915_private *i915, u64 hole_start, u64 hole_end, unsigned long end_time)) { - const u64 limit = totalram_pages << PAGE_SHIFT; + const u64 limit = atomic_long_read(&totalram_pages) << PAGE_SHIFT; struct i915_gem_context *ctx; struct i915_hw_ppgtt *ppgtt; IGT_TIMEOUT(end_time); diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index c5bc0b5..4498c94 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -1092,6 +1092,7 @@ static void process_info(struct hv_dynmem_device *dm, struct dm_info_msg *msg) static unsigned long compute_balloon_floor(void) { unsigned long min_pages; + unsigned long totalram = (unsigned long)atomic_long_read(&totalram_pages); #define MB2PAGES(mb) ((mb) << (20 - PAGE_SHIFT)) /* Simple continuous piecewiese linear function: * max MiB -> min MiB gradient @@ -1104,16 +1105,16 @@ static unsigned long compute_balloon_floor(void) * 8192 744 (1/16) * 32768 1512 (1/32) */ - if (totalram_pages < MB2PAGES(128)) - min_pages = MB2PAGES(8) + (totalram_pages >> 1); - else if (totalram_pages < MB2PAGES(512)) - min_pages = MB2PAGES(40) + (totalram_pages >> 2); - else if (totalram_pages < MB2PAGES(2048)) - min_pages = MB2PAGES(104) + (totalram_pages >> 3); - else if (totalram_pages < MB2PAGES(8192)) - min_pages = MB2PAGES(232) + (totalram_pages >> 4); + if (totalram < MB2PAGES(128)) + min_pages = MB2PAGES(8) + (totalram >> 1); + else if (totalram < MB2PAGES(512)) + min_pages = MB2PAGES(40) + (totalram >> 2); + else if (totalram < MB2PAGES(2048)) + min_pages = MB2PAGES(104) + (totalram >> 3); + else if (totalram < MB2PAGES(8192)) + min_pages = MB2PAGES(232) + (totalram >> 4); else - min_pages = MB2PAGES(488) + (totalram_pages >> 5); + min_pages = MB2PAGES(488) + (totalram >> 5); #undef MB2PAGES return min_pages; } diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c index dc385b7..6d61259 100644 --- a/drivers/md/dm-bufio.c +++ b/drivers/md/dm-bufio.c @@ -1887,8 +1887,9 @@ static int __init dm_bufio_init(void) dm_bufio_allocated_vmalloc = 0; dm_bufio_current_allocated = 0; - mem = (__u64)mult_frac(totalram_pages - totalhigh_pages, - DM_BUFIO_MEMORY_PERCENT, 100) << PAGE_SHIFT; + mem = (__u64)mult_frac(atomic_long_read(&totalram_pages) - + atomic_long_read(&totalhigh_pages), + DM_BUFIO_MEMORY_PERCENT, 100) << PAGE_SHIFT; if (mem > ULONG_MAX) mem = ULONG_MAX; diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 0481223..1c58f4c 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -2158,7 +2158,9 @@ static int crypt_wipe_key(struct crypt_config *cc) static void crypt_calculate_pages_per_client(void) { - unsigned long pages = (totalram_pages - totalhigh_pages) * DM_CRYPT_MEMORY_PERCENT / 100; + unsigned long pages = (atomic_long_read(&totalram_pages) - + atomic_long_read(&totalhigh_pages)) * + DM_CRYPT_MEMORY_PERCENT / 100; if (!dm_crypt_clients_n) return; diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c index bb3096b..d91c931 100644 --- a/drivers/md/dm-integrity.c +++ b/drivers/md/dm-integrity.c @@ -2843,7 +2843,9 @@ static int create_journal(struct dm_integrity_c *ic, char **error) journal_pages = roundup((__u64)ic->journal_sections * ic->journal_section_sectors, PAGE_SIZE >> SECTOR_SHIFT) >> (PAGE_SHIFT - SECTOR_SHIFT); journal_desc_size = journal_pages * sizeof(struct page_list); - if (journal_pages >= totalram_pages - totalhigh_pages || journal_desc_size > ULONG_MAX) { + if (journal_pages >= atomic_long_read(&totalram_pages) - + atomic_long_read(&totalhigh_pages) || + journal_desc_size > ULONG_MAX) { *error = "Journal doesn't fit into memory"; r = -ENOMEM; goto bad; diff --git a/drivers/md/dm-stats.c b/drivers/md/dm-stats.c index 21de30b..f154a07 100644 --- a/drivers/md/dm-stats.c +++ b/drivers/md/dm-stats.c @@ -85,7 +85,8 @@ static bool __check_shared_memory(size_t alloc_size) a = shared_memory_amount + alloc_size; if (a < shared_memory_amount) return false; - if (a >> PAGE_SHIFT > totalram_pages / DM_STATS_MEMORY_FACTOR) + if (a >> PAGE_SHIFT > atomic_long_read(&totalram_pages) / + DM_STATS_MEMORY_FACTOR) return false; #ifdef CONFIG_MMU if (a > (VMALLOC_END - VMALLOC_START) / DM_STATS_VMALLOC_FACTOR) diff --git a/drivers/media/platform/mtk-vpu/mtk_vpu.c b/drivers/media/platform/mtk-vpu/mtk_vpu.c index 616f78b..ee3654a 100644 --- a/drivers/media/platform/mtk-vpu/mtk_vpu.c +++ b/drivers/media/platform/mtk-vpu/mtk_vpu.c @@ -855,7 +855,8 @@ static int mtk_vpu_probe(struct platform_device *pdev) /* Set PTCM to 96K and DTCM to 32K */ vpu_cfg_writel(vpu, 0x2, VPU_TCM_CFG); - vpu->enable_4GB = !!(totalram_pages > (SZ_2G >> PAGE_SHIFT)); + vpu->enable_4GB = !!(atomic_long_read(&totalram_pages) > + (SZ_2G >> PAGE_SHIFT)); dev_info(dev, "4GB mode %u\n", vpu->enable_4GB); if (vpu->enable_4GB) { diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c index 9b0b3fa..0ac0fee 100644 --- a/drivers/misc/vmw_balloon.c +++ b/drivers/misc/vmw_balloon.c @@ -570,7 +570,7 @@ static int vmballoon_send_get_target(struct vmballoon *b) unsigned long status; unsigned long limit; - limit = totalram_pages; + limit = atomic_long_read(&totalram_pages); /* Ensure limit fits in 32-bits */ if (limit != (u32)limit) diff --git a/drivers/parisc/ccio-dma.c b/drivers/parisc/ccio-dma.c index 6148236..705df1a 100644 --- a/drivers/parisc/ccio-dma.c +++ b/drivers/parisc/ccio-dma.c @@ -1255,7 +1255,8 @@ void __init ccio_cujo20_fixup(struct parisc_device *cujo, u32 iovp) ** Hot-Plug/Removal of PCI cards. (aka PCI OLARD). */ - iova_space_size = (u32) (totalram_pages / count_parisc_driver(&ccio_driver)); + iova_space_size = (u32) (atomic_long_read(&totalram_pages) / + count_parisc_driver(&ccio_driver)); /* limit IOVA space size to 1MB-1GB */ @@ -1294,7 +1295,7 @@ void __init ccio_cujo20_fixup(struct parisc_device *cujo, u32 iovp) DBG_INIT("%s() hpa 0x%p mem %luMB IOV %dMB (%d bits)\n", __func__, ioc->ioc_regs, - (unsigned long) totalram_pages >> (20 - PAGE_SHIFT), + (unsigned long) atomic_long_read(&totalram_pages) >> (20 - PAGE_SHIFT), iova_space_size>>20, iov_order + PAGE_SHIFT); diff --git a/drivers/parisc/sba_iommu.c b/drivers/parisc/sba_iommu.c index 11de0ec..02f4ce9 100644 --- a/drivers/parisc/sba_iommu.c +++ b/drivers/parisc/sba_iommu.c @@ -1419,7 +1419,8 @@ static int setup_ibase_imask_callback(struct device *dev, void *data) ** for DMA hints - ergo only 30 bits max. */ - iova_space_size = (u32) (totalram_pages/global_ioc_cnt); + iova_space_size = (u32) (atomic_long_read(&totalram_pages)/ + global_ioc_cnt); /* limit IOVA space size to 1MB-1GB */ if (iova_space_size < (1 << (20 - PAGE_SHIFT))) { @@ -1444,7 +1445,7 @@ static int setup_ibase_imask_callback(struct device *dev, void *data) DBG_INIT("%s() hpa 0x%lx mem %ldMB IOV %dMB (%d bits)\n", __func__, ioc->ioc_hpa, - (unsigned long) totalram_pages >> (20 - PAGE_SHIFT), + (unsigned long) atomic_long_read(&totalram_pages) >> (20 - PAGE_SHIFT), iova_space_size>>20, iov_order + PAGE_SHIFT); diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c index 548bb02..64bd925 100644 --- a/drivers/staging/android/ion/ion_system_heap.c +++ b/drivers/staging/android/ion/ion_system_heap.c @@ -110,7 +110,7 @@ static int ion_system_heap_allocate(struct ion_heap *heap, unsigned long size_remaining = PAGE_ALIGN(size); unsigned int max_order = orders[0]; - if (size / PAGE_SIZE > totalram_pages / 2) + if (size / PAGE_SIZE > atomic_long_read(&totalram_pages) / 2) return -ENOMEM; INIT_LIST_HEAD(&pages); diff --git a/drivers/xen/xen-selfballoon.c b/drivers/xen/xen-selfballoon.c index 5165aa8..0b925fd 100644 --- a/drivers/xen/xen-selfballoon.c +++ b/drivers/xen/xen-selfballoon.c @@ -189,7 +189,7 @@ static void selfballoon_process(struct work_struct *work) bool reset_timer = false; if (xen_selfballooning_enabled) { - cur_pages = totalram_pages; + cur_pages = atomic_long_read(&totalram_pages); tgt_pages = cur_pages; /* default is no change */ goal_pages = vm_memory_committed() + totalreserve_pages + @@ -227,7 +227,8 @@ static void selfballoon_process(struct work_struct *work) if (tgt_pages < floor_pages) tgt_pages = floor_pages; balloon_set_new_target(tgt_pages + - balloon_stats.current_pages - totalram_pages); + balloon_stats.current_pages - + atomic_long_read(&totalram_pages)); reset_timer = true; } #ifdef CONFIG_FRONTSWAP @@ -569,7 +570,7 @@ int xen_selfballoon_init(bool use_selfballooning, bool use_frontswap_selfshrink) * much more reliably and response faster in some cases. */ if (!selfballoon_reserved_mb) { - reserve_pages = totalram_pages / 10; + reserve_pages = atomic_long_read(&totalram_pages) / 10; selfballoon_reserved_mb = PAGES2MB(reserve_pages); } schedule_delayed_work(&selfballoon_worker, selfballoon_interval * HZ); diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 582e28f..92f56d3 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -807,7 +807,8 @@ static inline int default_congestion_kb(void) * This allows larger machines to have larger/more transfers. * Limit the default to 256M */ - congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10); + congestion_kb = (16*int_sqrt(atomic_long_read(&totalram_pages))) << + (PAGE_SHIFT-10); if (congestion_kb > 256*1024) congestion_kb = 256*1024; diff --git a/fs/file_table.c b/fs/file_table.c index e03c8d1..5dde5c3 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -383,10 +383,13 @@ void __init files_init(void) void __init files_maxfiles_init(void) { unsigned long n; - unsigned long memreserve = (totalram_pages - nr_free_pages()) * 3/2; + unsigned long memreserve = (atomic_long_read(&totalram_pages) - + nr_free_pages()) * 3/2; - memreserve = min(memreserve, totalram_pages - 1); - n = ((totalram_pages - memreserve) * (PAGE_SIZE / 1024)) / 10; + memreserve = min(memreserve, + (unsigned long)atomic_long_read(&totalram_pages) - 1); + n = ((atomic_long_read(&totalram_pages) - memreserve) * + (PAGE_SIZE / 1024)) / 10; files_stat.max_files = max_t(unsigned long, n, NR_FILE); } diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 4727ef6..acdbaf7 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -825,8 +825,8 @@ static struct dentry *fuse_get_parent(struct dentry *child) static void sanitize_global_limit(unsigned *limit) { if (*limit == 0) - *limit = ((totalram_pages << PAGE_SHIFT) >> 13) / - sizeof(struct fuse_req); + *limit = ((atomic_long_read(&totalram_pages) + << PAGE_SHIFT) >> 13) / sizeof(struct fuse_req); if (*limit >= 1 << 16) *limit = (1 << 16) - 1; diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 586726a..e3663b7 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -2121,7 +2121,8 @@ int __init nfs_init_writepagecache(void) * This allows larger machines to have larger/more transfers. * Limit the default to 256M */ - nfs_congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10); + nfs_congestion_kb = (16*int_sqrt(atomic_long_read(&totalram_pages))) << + (PAGE_SHIFT-10); if (nfs_congestion_kb > 256*1024) nfs_congestion_kb = 256*1024; diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index e2fe0e9..e877558 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -99,7 +99,8 @@ static unsigned long nfsd_reply_cache_scan(struct shrinker *shrink, nfsd_cache_size_limit(void) { unsigned int limit; - unsigned long low_pages = totalram_pages - totalhigh_pages; + unsigned long low_pages = atomic_long_read(&totalram_pages) - + atomic_long_read(&totalhigh_pages); limit = (16 * int_sqrt(low_pages)) << (PAGE_SHIFT-10); return min_t(unsigned int, limit, 256*1024); diff --git a/fs/ntfs/malloc.h b/fs/ntfs/malloc.h index ab172e5..4ae6bbe 100644 --- a/fs/ntfs/malloc.h +++ b/fs/ntfs/malloc.h @@ -47,7 +47,7 @@ static inline void *__ntfs_malloc(unsigned long size, gfp_t gfp_mask) return kmalloc(PAGE_SIZE, gfp_mask & ~__GFP_HIGHMEM); /* return (void *)__get_free_page(gfp_mask); */ } - if (likely((size >> PAGE_SHIFT) < totalram_pages)) + if (likely((size >> PAGE_SHIFT) < atomic_long_read(&totalram_pages))) return __vmalloc(size, gfp_mask, PAGE_KERNEL); return NULL; } diff --git a/fs/proc/base.c b/fs/proc/base.c index ce34654..9ef26dc 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -530,7 +530,8 @@ static ssize_t lstats_write(struct file *file, const char __user *buf, static int proc_oom_score(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *task) { - unsigned long totalpages = totalram_pages + total_swap_pages; + unsigned long totalpages = atomic_long_read(&totalram_pages) + + total_swap_pages; unsigned long points = 0; points = oom_badness(task, NULL, NULL, totalpages) * diff --git a/include/linux/highmem.h b/include/linux/highmem.h index 0690679..84edaa2 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -36,7 +36,7 @@ static inline void invalidate_kernel_vmap_range(void *vaddr, int size) /* declarations for linux/mm/highmem.c */ unsigned int nr_free_highpages(void); -extern unsigned long totalhigh_pages; +extern atomic_long_t totalhigh_pages; void kmap_flush_unused(void); diff --git a/include/linux/mm.h b/include/linux/mm.h index fcf9cc9..af952fc 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -48,7 +48,7 @@ static inline void set_max_mapnr(unsigned long limit) static inline void set_max_mapnr(unsigned long limit) { } #endif -extern unsigned long totalram_pages; +extern atomic_long_t totalram_pages; extern void * high_memory; extern int page_cluster; diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 8555509..2639b05 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -428,14 +428,8 @@ struct zone { * Write access to present_pages at runtime should be protected by * mem_hotplug_begin/end(). Any reader who can't tolerant drift of * present_pages should get_online_mems() to get a stable value. - * - * Read access to managed_pages should be safe because it's unsigned - * long. Write access to zone->managed_pages and totalram_pages are - * protected by managed_page_count_lock at runtime. Idealy only - * adjust_managed_page_count() should be used instead of directly - * touching zone->managed_pages and totalram_pages. */ - unsigned long managed_pages; + atomic_long_t managed_pages; unsigned long spanned_pages; unsigned long present_pages; @@ -814,7 +808,7 @@ static inline bool is_dev_zone(const struct zone *zone) */ static inline bool managed_zone(struct zone *zone) { - return zone->managed_pages; + return atomic_long_read(&zone->managed_pages); } /* Returns true if a zone has memory */ diff --git a/include/linux/swap.h b/include/linux/swap.h index d098743..b34c6e7 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -309,7 +309,7 @@ struct vma_swap_readahead { } while (0) /* linux/mm/page_alloc.c */ -extern unsigned long totalram_pages; +extern atomic_long_t totalram_pages; extern unsigned long totalreserve_pages; extern unsigned long nr_free_buffer_pages(void); extern unsigned long nr_free_pagecache_pages(void); diff --git a/kernel/fork.c b/kernel/fork.c index 2f78d32..b6068c5 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -744,11 +744,11 @@ static void set_max_threads(unsigned int max_threads_suggested) * The number of threads shall be limited such that the thread * structures may only consume a small part of the available memory. */ - if (fls64(totalram_pages) + fls64(PAGE_SIZE) > 64) + if (fls64(atomic_long_read(&totalram_pages)) + fls64(PAGE_SIZE) > 64) threads = MAX_THREADS; else - threads = div64_u64((u64) totalram_pages * (u64) PAGE_SIZE, - (u64) THREAD_SIZE * 8UL); + threads = div64_u64((u64) atomic_long_read(&totalram_pages) * + (u64) PAGE_SIZE, (u64) THREAD_SIZE * 8UL); if (threads > max_threads_suggested) threads = max_threads_suggested; diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c index 86ef06d..ed85ddd 100644 --- a/kernel/kexec_core.c +++ b/kernel/kexec_core.c @@ -217,13 +217,14 @@ int sanity_check_segment_list(struct kimage *image) * wasted allocating pages, which can cause a soft lockup. */ for (i = 0; i < nr_segments; i++) { - if (PAGE_COUNT(image->segment[i].memsz) > totalram_pages / 2) + if (PAGE_COUNT(image->segment[i].memsz) > + atomic_long_read(&totalram_pages) / 2) return -EINVAL; total_pages += PAGE_COUNT(image->segment[i].memsz); } - if (total_pages > totalram_pages / 2) + if (total_pages > atomic_long_read(&totalram_pages) / 2) return -EINVAL; /* diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index b0308a2..142a3c76 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -105,7 +105,7 @@ void __init hibernate_reserved_size_init(void) void __init hibernate_image_size_init(void) { - image_size = ((totalram_pages * 2) / 5) * PAGE_SIZE; + image_size = ((atomic_long_read(&totalram_pages) * 2) / 5) * PAGE_SIZE; } /* diff --git a/lib/show_mem.c b/lib/show_mem.c index 0beaa1d..0701f63 100644 --- a/lib/show_mem.c +++ b/lib/show_mem.c @@ -28,7 +28,8 @@ void show_mem(unsigned int filter, nodemask_t *nodemask) continue; total += zone->present_pages; - reserved += zone->present_pages - zone->managed_pages; + reserved += zone->present_pages - + atomic_long_read(&zone->managed_pages); if (is_highmem_idx(zoneid)) highmem += zone->present_pages; diff --git a/mm/highmem.c b/mm/highmem.c index 59db322..93a45c0 100644 --- a/mm/highmem.c +++ b/mm/highmem.c @@ -105,7 +105,7 @@ static inline wait_queue_head_t *get_pkmap_wait_queue_head(unsigned int color) } #endif -unsigned long totalhigh_pages __read_mostly; +atomic_long_t totalhigh_pages __read_mostly; EXPORT_SYMBOL(totalhigh_pages); diff --git a/mm/huge_memory.c b/mm/huge_memory.c index d394d18..f2f18b5 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -420,7 +420,7 @@ static int __init hugepage_init(void) * where the extra memory used could hurt more than TLB overhead * is likely to save. The admin can still enable it through /sys. */ - if (totalram_pages < (512 << (20 - PAGE_SHIFT))) { + if (atomic_long_read(&totalram_pages) < (512 << (20 - PAGE_SHIFT))) { transparent_hugepage_flags = 0; return 0; } diff --git a/mm/kasan/quarantine.c b/mm/kasan/quarantine.c index b209dba..4d36aed 100644 --- a/mm/kasan/quarantine.c +++ b/mm/kasan/quarantine.c @@ -236,8 +236,8 @@ void quarantine_reduce(void) * Update quarantine size in case of hotplug. Allocate a fraction of * the installed memory to quarantine minus per-cpu queue limits. */ - total_size = (READ_ONCE(totalram_pages) << PAGE_SHIFT) / - QUARANTINE_FRACTION; + total_size = (READ_ONCE(atomic_long_read(&totalram_pages)) << + PAGE_SHIFT) / QUARANTINE_FRACTION; percpu_quarantines = QUARANTINE_PERCPU_SIZE * num_online_cpus(); new_quarantine_size = (total_size < percpu_quarantines) ? 0 : total_size - percpu_quarantines; diff --git a/mm/memblock.c b/mm/memblock.c index eddcac2..43f53e9 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -1627,7 +1627,7 @@ void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) for (; cursor < end; cursor++) { memblock_free_pages(pfn_to_page(cursor), cursor, 0); - totalram_pages++; + atomic_long_inc(&totalram_pages); } } @@ -2001,7 +2001,7 @@ void reset_node_managed_pages(pg_data_t *pgdat) struct zone *z; for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++) - z->managed_pages = 0; + atomic_long_set(&z->managed_pages, 0); } void __init reset_all_zones_managed_pages(void) @@ -2029,7 +2029,7 @@ unsigned long __init memblock_free_all(void) reset_all_zones_managed_pages(); pages = free_low_memory_core_early(); - totalram_pages += pages; + atomic_long_add(pages, &totalram_pages); return pages; } diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index dbbb945..0725984 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -657,10 +657,10 @@ void __online_page_free(struct page *page) static int generic_online_page(struct page *page, unsigned int order) { __free_pages_core(page, order); - totalram_pages += (1UL << order); + atomic_long_add((1UL << order), &totalram_pages); #ifdef CONFIG_HIGHMEM if (PageHighMem(page)) - totalhigh_pages += (1UL << order); + atomic_long_add((1UL << order), &totalhigh_pages); #endif return 0; } diff --git a/mm/mm_init.c b/mm/mm_init.c index 6838a53..93a6611 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -146,7 +146,8 @@ static void __meminit mm_compute_batch(void) s32 batch = max_t(s32, nr*2, 32); /* batch size set to 0.4% of (total memory/#cpus), or max int32 */ - memsized_batch = min_t(u64, (totalram_pages/nr)/256, 0x7fffffff); + memsized_batch = min_t(u64, (atomic_long_read(&totalram_pages)/nr)/256, + 0x7fffffff); vm_committed_as_batch = max_t(s32, memsized_batch, batch); } diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 6589f60..1a37d68 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -269,7 +269,7 @@ static enum oom_constraint constrained_alloc(struct oom_control *oc) } /* Default to all available memory */ - oc->totalpages = totalram_pages + total_swap_pages; + oc->totalpages = atomic_long_read(&totalram_pages) + total_swap_pages; if (!IS_ENABLED(CONFIG_NUMA)) return CONSTRAINT_NONE; diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 4bd858d..c7b26e3 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -121,10 +121,7 @@ }; EXPORT_SYMBOL(node_states); -/* Protect totalram_pages and zone->managed_pages */ -static DEFINE_SPINLOCK(managed_page_count_lock); - -unsigned long totalram_pages __read_mostly; +atomic_long_t totalram_pages __read_mostly; unsigned long totalreserve_pages __read_mostly; unsigned long totalcma_pages __read_mostly; @@ -1275,7 +1272,7 @@ void __free_pages_core(struct page *page, unsigned int order) set_page_count(p, 0); } - page_zone(page)->managed_pages += nr_pages; + atomic_long_add(nr_pages, &page_zone(page)->managed_pages); set_page_refcounted(page); __free_pages(page, order); } @@ -2254,7 +2251,8 @@ static void reserve_highatomic_pageblock(struct page *page, struct zone *zone, * Limit the number reserved to 1 pageblock or roughly 1% of a zone. * Check is race-prone but harmless. */ - max_managed = (zone->managed_pages / 100) + pageblock_nr_pages; + max_managed = (atomic_long_read(&zone->managed_pages) / 100) + + pageblock_nr_pages; if (zone->nr_reserved_highatomic >= max_managed) return; @@ -4658,7 +4656,7 @@ static unsigned long nr_free_zone_pages(int offset) struct zonelist *zonelist = node_zonelist(numa_node_id(), GFP_KERNEL); for_each_zone_zonelist(zone, z, zonelist, offset) { - unsigned long size = zone->managed_pages; + unsigned long size = atomic_long_read(&zone->managed_pages); unsigned long high = high_wmark_pages(zone); if (size > high) sum += size - high; @@ -4744,11 +4742,15 @@ long si_mem_available(void) void si_meminfo(struct sysinfo *val) { - val->totalram = totalram_pages; + val->totalram = atomic_long_read(&totalram_pages); val->sharedram = global_node_page_state(NR_SHMEM); val->freeram = global_zone_page_state(NR_FREE_PAGES); val->bufferram = nr_blockdev_pages(); - val->totalhigh = totalhigh_pages; +#ifdef CONFIG_HIGHMEM + val->totalhigh = atomic_long_read(&totalhigh_pages); +#else + val->totalhigh = 0; +#endif val->freehigh = nr_free_highpages(); val->mem_unit = PAGE_SIZE; } @@ -4765,7 +4767,7 @@ void si_meminfo_node(struct sysinfo *val, int nid) pg_data_t *pgdat = NODE_DATA(nid); for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++) - managed_pages += pgdat->node_zones[zone_type].managed_pages; + managed_pages += atomic_long_read(&pgdat->node_zones[zone_type].managed_pages); val->totalram = managed_pages; val->sharedram = node_page_state(pgdat, NR_SHMEM); val->freeram = sum_zone_node_page_state(nid, NR_FREE_PAGES); @@ -4774,7 +4776,7 @@ void si_meminfo_node(struct sysinfo *val, int nid) struct zone *zone = &pgdat->node_zones[zone_type]; if (is_highmem(zone)) { - managed_highpages += zone->managed_pages; + managed_highpages += atomic_long_read(&zone->managed_pages); free_highpages += zone_page_state(zone, NR_FREE_PAGES); } } @@ -4981,7 +4983,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask) K(zone_page_state(zone, NR_ZONE_UNEVICTABLE)), K(zone_page_state(zone, NR_ZONE_WRITE_PENDING)), K(zone->present_pages), - K(zone->managed_pages), + K(atomic_long_read(&zone->managed_pages)), K(zone_page_state(zone, NR_MLOCK)), zone_page_state(zone, NR_KERNEL_STACK_KB), K(zone_page_state(zone, NR_PAGETABLE)), @@ -5643,7 +5645,7 @@ static int zone_batchsize(struct zone *zone) * The per-cpu-pages pools are set to around 1000th of the * size of the zone. */ - batch = zone->managed_pages / 1024; + batch = atomic_long_read(&zone->managed_pages) / 1024; /* But no more than a meg. */ if (batch * PAGE_SIZE > 1024 * 1024) batch = (1024 * 1024) / PAGE_SIZE; @@ -5754,7 +5756,7 @@ static void pageset_set_high_and_batch(struct zone *zone, { if (percpu_pagelist_fraction) pageset_set_high(pcp, - (zone->managed_pages / + (atomic_long_read(&zone->managed_pages) / percpu_pagelist_fraction)); else pageset_set_batch(pcp, zone_batchsize(zone)); @@ -6309,7 +6311,7 @@ static void __meminit pgdat_init_internals(struct pglist_data *pgdat) static void __meminit zone_init_internals(struct zone *zone, enum zone_type idx, int nid, unsigned long remaining_pages) { - zone->managed_pages = remaining_pages; + atomic_long_set(&zone->managed_pages, remaining_pages); zone_set_nid(zone, nid); zone->name = zone_names[idx]; zone->zone_pgdat = NODE_DATA(nid); @@ -7061,14 +7063,12 @@ static int __init cmdline_parse_movablecore(char *p) void adjust_managed_page_count(struct page *page, long count) { - spin_lock(&managed_page_count_lock); - page_zone(page)->managed_pages += count; - totalram_pages += count; + atomic_long_add(count, &page_zone(page)->managed_pages); + atomic_long_add(count, &totalram_pages); #ifdef CONFIG_HIGHMEM if (PageHighMem(page)) - totalhigh_pages += count; + atomic_long_add(count, &totalhigh_pages); #endif - spin_unlock(&managed_page_count_lock); } EXPORT_SYMBOL(adjust_managed_page_count); @@ -7109,9 +7109,9 @@ unsigned long free_reserved_area(void *start, void *end, int poison, char *s) void free_highmem_page(struct page *page) { __free_reserved_page(page); - totalram_pages++; - page_zone(page)->managed_pages++; - totalhigh_pages++; + atomic_long_inc(&totalram_pages); + atomic_long_inc(&page_zone(page)->managed_pages); + atomic_long_inc(&totalhigh_pages); } #endif @@ -7160,10 +7160,10 @@ void __init mem_init_print_info(const char *str) physpages << (PAGE_SHIFT - 10), codesize >> 10, datasize >> 10, rosize >> 10, (init_data_size + init_code_size) >> 10, bss_size >> 10, - (physpages - totalram_pages - totalcma_pages) << (PAGE_SHIFT - 10), + (physpages - atomic_long_read(&totalram_pages) - totalcma_pages) << (PAGE_SHIFT - 10), totalcma_pages << (PAGE_SHIFT - 10), #ifdef CONFIG_HIGHMEM - totalhigh_pages << (PAGE_SHIFT - 10), + atomic_long_read(&totalhigh_pages) << (PAGE_SHIFT - 10), #endif str ? ", " : "", str ? str : ""); } @@ -7253,8 +7253,8 @@ static void calculate_totalreserve_pages(void) /* we treat the high watermark as reserved pages. */ max += high_wmark_pages(zone); - if (max > zone->managed_pages) - max = zone->managed_pages; + if (max > atomic_long_read(&zone->managed_pages)) + max = atomic_long_read(&zone->managed_pages); pgdat->totalreserve_pages += max; @@ -7278,7 +7278,7 @@ static void setup_per_zone_lowmem_reserve(void) for_each_online_pgdat(pgdat) { for (j = 0; j < MAX_NR_ZONES; j++) { struct zone *zone = pgdat->node_zones + j; - unsigned long managed_pages = zone->managed_pages; + unsigned long managed_pages = atomic_long_read(&zone->managed_pages); zone->lowmem_reserve[j] = 0; @@ -7296,7 +7296,7 @@ static void setup_per_zone_lowmem_reserve(void) lower_zone->lowmem_reserve[j] = managed_pages / sysctl_lowmem_reserve_ratio[idx]; } - managed_pages += lower_zone->managed_pages; + managed_pages += atomic_long_read(&lower_zone->managed_pages); } } } @@ -7315,14 +7315,14 @@ static void __setup_per_zone_wmarks(void) /* Calculate total number of !ZONE_HIGHMEM pages */ for_each_zone(zone) { if (!is_highmem(zone)) - lowmem_pages += zone->managed_pages; + lowmem_pages += atomic_long_read(&zone->managed_pages); } for_each_zone(zone) { u64 tmp; spin_lock_irqsave(&zone->lock, flags); - tmp = (u64)pages_min * zone->managed_pages; + tmp = (u64)pages_min * atomic_long_read(&zone->managed_pages); do_div(tmp, lowmem_pages); if (is_highmem(zone)) { /* @@ -7336,7 +7336,8 @@ static void __setup_per_zone_wmarks(void) */ unsigned long min_pages; - min_pages = zone->managed_pages / 1024; + min_pages = atomic_long_read(&zone->managed_pages) / + 1024; min_pages = clamp(min_pages, SWAP_CLUSTER_MAX, 128UL); zone->watermark[WMARK_MIN] = min_pages; } else { @@ -7353,7 +7354,7 @@ static void __setup_per_zone_wmarks(void) * ensure a minimum size on small systems. */ tmp = max_t(u64, tmp >> 2, - mult_frac(zone->managed_pages, + mult_frac(atomic_long_read(&zone->managed_pages), watermark_scale_factor, 10000)); zone->watermark[WMARK_LOW] = min_wmark_pages(zone) + tmp; @@ -7483,7 +7484,8 @@ static void setup_min_unmapped_ratio(void) pgdat->min_unmapped_pages = 0; for_each_zone(zone) - zone->zone_pgdat->min_unmapped_pages += (zone->managed_pages * + zone->zone_pgdat->min_unmapped_pages += + (atomic_long_read(&zone->managed_pages) * sysctl_min_unmapped_ratio) / 100; } @@ -7511,8 +7513,9 @@ static void setup_min_slab_ratio(void) pgdat->min_slab_pages = 0; for_each_zone(zone) - zone->zone_pgdat->min_slab_pages += (zone->managed_pages * - sysctl_min_slab_ratio) / 100; + zone->zone_pgdat->min_slab_pages += + (atomic_long_read(&zone->managed_pages) * + sysctl_min_slab_ratio) / 100; } int sysctl_min_slab_ratio_sysctl_handler(struct ctl_table *table, int write, diff --git a/mm/shmem.c b/mm/shmem.c index a6964ba..edd55db 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -109,12 +109,18 @@ struct shmem_falloc { #ifdef CONFIG_TMPFS static unsigned long shmem_default_max_blocks(void) { - return totalram_pages / 2; + return atomic_long_read(&totalram_pages) / 2; } static unsigned long shmem_default_max_inodes(void) { - return min(totalram_pages - totalhigh_pages, totalram_pages / 2); + return min((unsigned long)atomic_long_read(&totalram_pages) - +#ifdef CONFIG_HIGHMEM + (unsigned long) atomic_long_read(&totalhigh_pages), +#else + 0, +#endif + (unsigned long)atomic_long_read(&totalram_pages) / 2); } #endif @@ -3274,7 +3280,7 @@ static int shmem_parse_options(char *options, struct shmem_sb_info *sbinfo, size = memparse(value,&rest); if (*rest == '%') { size <<= PAGE_SHIFT; - size *= totalram_pages; + size *= atomic_long_read(&totalram_pages); do_div(size, 100); rest++; } diff --git a/mm/slab.c b/mm/slab.c index 2a5654b..70252b0 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -1248,7 +1248,8 @@ void __init kmem_cache_init(void) * page orders on machines with more than 32MB of memory if * not overridden on the command line. */ - if (!slab_max_order_set && totalram_pages > (32 << 20) >> PAGE_SHIFT) + if (!slab_max_order_set && atomic_long_read(&totalram_pages) > + (32 << 20) >> PAGE_SHIFT) slab_max_order = SLAB_MAX_ORDER_HI; /* Bootstrap is tricky, because several objects are allocated diff --git a/mm/swap.c b/mm/swap.c index aa48371..e85bc4a 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -1023,7 +1023,8 @@ unsigned pagevec_lookup_range_nr_tag(struct pagevec *pvec, */ void __init swap_setup(void) { - unsigned long megs = totalram_pages >> (20 - PAGE_SHIFT); + unsigned long megs = atomic_long_read(&totalram_pages) >> + (20 - PAGE_SHIFT); /* Use a smaller cluster for small-memory machines */ if (megs < 16) diff --git a/mm/util.c b/mm/util.c index 7f1f165..a3ae8ee 100644 --- a/mm/util.c +++ b/mm/util.c @@ -600,7 +600,7 @@ unsigned long vm_commit_limit(void) if (sysctl_overcommit_kbytes) allowed = sysctl_overcommit_kbytes >> (PAGE_SHIFT - 10); else - allowed = ((totalram_pages - hugetlb_total_pages()) + allowed = ((atomic_long_read(&totalram_pages) - hugetlb_total_pages()) * sysctl_overcommit_ratio / 100); allowed += total_swap_pages; diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 97d4b25..f177af8 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -1634,7 +1634,7 @@ void *vmap(struct page **pages, unsigned int count, might_sleep(); - if (count > totalram_pages) + if (count > atomic_long_read(&totalram_pages)) return NULL; size = (unsigned long)count << PAGE_SHIFT; @@ -1739,7 +1739,7 @@ void *__vmalloc_node_range(unsigned long size, unsigned long align, unsigned long real_size = size; size = PAGE_ALIGN(size); - if (!size || (size >> PAGE_SHIFT) > totalram_pages) + if (!size || (size >> PAGE_SHIFT) > atomic_long_read(&totalram_pages)) goto fail; area = __get_vm_area_node(size, align, VM_ALLOC | VM_UNINITIALIZED | diff --git a/mm/vmstat.c b/mm/vmstat.c index 6038ce5..20551e8 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -227,7 +227,7 @@ int calculate_normal_threshold(struct zone *zone) * 125 1024 10 16-32 GB 9 */ - mem = zone->managed_pages >> (27 - PAGE_SHIFT); + mem = atomic_long_read(&zone->managed_pages) >> (27 - PAGE_SHIFT); threshold = 2 * fls(num_online_cpus()) * (1 + fls(mem)); @@ -1569,7 +1569,7 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat, high_wmark_pages(zone), zone->spanned_pages, zone->present_pages, - zone->managed_pages); + atomic_long_read(&zone->managed_pages)); seq_printf(m, "\n protection: (%ld", diff --git a/mm/workingset.c b/mm/workingset.c index b15799d..dcd4e16 100644 --- a/mm/workingset.c +++ b/mm/workingset.c @@ -550,7 +550,7 @@ static int __init workingset_init(void) * double the initial memory by using totalram_pages as-is. */ timestamp_bits = BITS_PER_LONG - EVICTION_SHIFT; - max_order = fls_long(totalram_pages - 1); + max_order = fls_long(atomic_long_read(&totalram_pages) - 1); if (max_order > timestamp_bits) bucket_order = max_order - timestamp_bits; pr_info("workingset: timestamp_bits=%d max_order=%d bucket_order=%u\n", diff --git a/mm/zswap.c b/mm/zswap.c index cd91fd9..5d2d7b9 100644 --- a/mm/zswap.c +++ b/mm/zswap.c @@ -219,7 +219,7 @@ struct zswap_tree { static bool zswap_is_full(void) { - return totalram_pages * zswap_max_pool_percent / 100 < + return atomic_long_read(&totalram_pages) * zswap_max_pool_percent / 100 < DIV_ROUND_UP(zswap_pool_total_size, PAGE_SIZE); } diff --git a/net/dccp/proto.c b/net/dccp/proto.c index 875858c..4a92d11 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -1154,10 +1154,10 @@ static int __init dccp_init(void) * * The methodology is similar to that of the buffer cache. */ - if (totalram_pages >= (128 * 1024)) - goal = totalram_pages >> (21 - PAGE_SHIFT); + if (atomic_long_read(&totalram_pages) >= (128 * 1024)) + goal = atomic_long_read(&totalram_pages) >> (21 - PAGE_SHIFT); else - goal = totalram_pages >> (23 - PAGE_SHIFT); + goal = atomic_long_read(&totalram_pages) >> (23 - PAGE_SHIFT); if (thash_entries) goal = (thash_entries * diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c index 1c002c0..bb49b0f 100644 --- a/net/decnet/dn_route.c +++ b/net/decnet/dn_route.c @@ -1866,7 +1866,7 @@ void __init dn_route_init(void) dn_route_timer.expires = jiffies + decnet_dst_gc_interval * HZ; add_timer(&dn_route_timer); - goal = totalram_pages >> (26 - PAGE_SHIFT); + goal = atomic_long_read(&totalram_pages) >> (26 - PAGE_SHIFT); for(order = 0; (1UL << order) < goal; order++) /* NOTHING */; diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c index 03b51cd..d91bdab 100644 --- a/net/ipv4/tcp_metrics.c +++ b/net/ipv4/tcp_metrics.c @@ -1000,7 +1000,7 @@ static int __net_init tcp_net_metrics_init(struct net *net) slots = tcpmhash_entries; if (!slots) { - if (totalram_pages >= 128 * 1024) + if (atomic_long_read(&totalram_pages) >= 128 * 1024) slots = 16 * 1024; else slots = 8 * 1024; diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index ca1168d..3285df9 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -2267,11 +2267,11 @@ int nf_conntrack_init_start(void) * >= 4GB machines have 65536 buckets. */ nf_conntrack_htable_size - = (((totalram_pages << PAGE_SHIFT) / 16384) + = (((atomic_long_read(&totalram_pages) << PAGE_SHIFT) / 16384) / sizeof(struct hlist_head)); - if (totalram_pages > (4 * (1024 * 1024 * 1024 / PAGE_SIZE))) + if (atomic_long_read(&totalram_pages) > (4 * (1024 * 1024 * 1024 / PAGE_SIZE))) nf_conntrack_htable_size = 65536; - else if (totalram_pages > (1024 * 1024 * 1024 / PAGE_SIZE)) + else if (atomic_long_read(&totalram_pages) > (1024 * 1024 * 1024 / PAGE_SIZE)) nf_conntrack_htable_size = 16384; if (nf_conntrack_htable_size < 32) nf_conntrack_htable_size = 32; diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c index 3e7d259..3c79a0f 100644 --- a/net/netfilter/xt_hashlimit.c +++ b/net/netfilter/xt_hashlimit.c @@ -279,9 +279,9 @@ static int htable_create(struct net *net, struct hashlimit_cfg3 *cfg, if (cfg->size) { size = cfg->size; } else { - size = (totalram_pages << PAGE_SHIFT) / 16384 / + size = (atomic_long_read(&totalram_pages) << PAGE_SHIFT) / 16384 / sizeof(struct hlist_head); - if (totalram_pages > 1024 * 1024 * 1024 / PAGE_SIZE) + if (atomic_long_read(&totalram_pages) > 1024 * 1024 * 1024 / PAGE_SIZE) size = 8192; if (size < 16) size = 16; diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c index 9b277bd..4ca4def 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -1426,10 +1426,10 @@ static __init int sctp_init(void) * The methodology is similar to that of the tcp hash tables. * Though not identical. Start by getting a goal size */ - if (totalram_pages >= (128 * 1024)) - goal = totalram_pages >> (22 - PAGE_SHIFT); + if (atomic_long_read(&totalram_pages) >= (128 * 1024)) + goal = atomic_long_read(&totalram_pages) >> (22 - PAGE_SHIFT); else - goal = totalram_pages >> (24 - PAGE_SHIFT); + goal = atomic_long_read(&totalram_pages) >> (24 - PAGE_SHIFT); /* Then compute the page order for said goal */ order = get_order(goal); diff --git a/security/integrity/ima/ima_kexec.c b/security/integrity/ima/ima_kexec.c index 16bd187..8bb32ad 100644 --- a/security/integrity/ima/ima_kexec.c +++ b/security/integrity/ima/ima_kexec.c @@ -106,7 +106,7 @@ void ima_add_kexec_buffer(struct kimage *image) kexec_segment_size = ALIGN(ima_get_binary_runtime_size() + PAGE_SIZE / 2, PAGE_SIZE); if ((kexec_segment_size == ULONG_MAX) || - ((kexec_segment_size >> PAGE_SHIFT) > totalram_pages / 2)) { + ((kexec_segment_size >> PAGE_SHIFT) > atomic_long_read(&totalram_pages) / 2)) { pr_err("Binary measurement list too large.\n"); return; } -- 1.9.1 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
