The patch titled
Subject: powerpc: query dynamic DEBUG_PAGEALLOC setting
has been added to the -mm tree. Its filename is
powerpc-query-dynamic-debug_pagealloc-setting.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/powerpc-query-dynamic-debug_pagealloc-setting.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/powerpc-query-dynamic-debug_pagealloc-setting.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Subject: powerpc: query dynamic DEBUG_PAGEALLOC setting
We can disable debug_pagealloc processing even if the code is compiled
with CONFIG_DEBUG_PAGEALLOC. This patch changes the code to query whether
it is enabled or not in runtime.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/kernel/traps.c | 5 +---
arch/powerpc/mm/hash_utils_64.c | 36 ++++++++++++++++--------------
arch/powerpc/mm/init_32.c | 8 +++---
3 files changed, 26 insertions(+), 23 deletions(-)
diff -puN arch/powerpc/kernel/traps.c~powerpc-query-dynamic-debug_pagealloc-setting arch/powerpc/kernel/traps.c
--- a/arch/powerpc/kernel/traps.c~powerpc-query-dynamic-debug_pagealloc-setting
+++ a/arch/powerpc/kernel/traps.c
@@ -203,9 +203,8 @@ static int __kprobes __die(const char *s
#ifdef CONFIG_SMP
printk("SMP NR_CPUS=%d ", NR_CPUS);
#endif
-#ifdef CONFIG_DEBUG_PAGEALLOC
- printk("DEBUG_PAGEALLOC ");
-#endif
+ if (debug_pagealloc_enabled())
+ printk("DEBUG_PAGEALLOC ");
#ifdef CONFIG_NUMA
printk("NUMA ");
#endif
diff -puN arch/powerpc/mm/hash_utils_64.c~powerpc-query-dynamic-debug_pagealloc-setting arch/powerpc/mm/hash_utils_64.c
--- a/arch/powerpc/mm/hash_utils_64.c~powerpc-query-dynamic-debug_pagealloc-setting
+++ a/arch/powerpc/mm/hash_utils_64.c
@@ -255,8 +255,10 @@ int htab_bolt_mapping(unsigned long vsta
if (ret < 0)
break;
+
#ifdef CONFIG_DEBUG_PAGEALLOC
- if ((paddr >> PAGE_SHIFT) < linear_map_hash_count)
+ if (debug_pagealloc_enabled() &&
+ (paddr >> PAGE_SHIFT) < linear_map_hash_count)
linear_map_hash_slots[paddr >> PAGE_SHIFT] = ret | 0x80;
#endif /* CONFIG_DEBUG_PAGEALLOC */
}
@@ -512,17 +514,17 @@ static void __init htab_init_page_sizes(
if (mmu_has_feature(MMU_FTR_16M_PAGE))
memcpy(mmu_psize_defs, mmu_psize_defaults_gp,
sizeof(mmu_psize_defaults_gp));
- found:
-#ifndef CONFIG_DEBUG_PAGEALLOC
- /*
- * Pick a size for the linear mapping. Currently, we only support
- * 16M, 1M and 4K which is the default
- */
- if (mmu_psize_defs[MMU_PAGE_16M].shift)
- mmu_linear_psize = MMU_PAGE_16M;
- else if (mmu_psize_defs[MMU_PAGE_1M].shift)
- mmu_linear_psize = MMU_PAGE_1M;
-#endif /* CONFIG_DEBUG_PAGEALLOC */
+found:
+ if (!debug_pagealloc_enabled()) {
+ /*
+ * Pick a size for the linear mapping. Currently, we only
+ * support 16M, 1M and 4K which is the default
+ */
+ if (mmu_psize_defs[MMU_PAGE_16M].shift)
+ mmu_linear_psize = MMU_PAGE_16M;
+ else if (mmu_psize_defs[MMU_PAGE_1M].shift)
+ mmu_linear_psize = MMU_PAGE_1M;
+ }
#ifdef CONFIG_PPC_64K_PAGES
/*
@@ -721,10 +723,12 @@ static void __init htab_initialize(void)
prot = pgprot_val(PAGE_KERNEL);
#ifdef CONFIG_DEBUG_PAGEALLOC
- linear_map_hash_count = memblock_end_of_DRAM() >> PAGE_SHIFT;
- linear_map_hash_slots = __va(memblock_alloc_base(linear_map_hash_count,
- 1, ppc64_rma_size));
- memset(linear_map_hash_slots, 0, linear_map_hash_count);
+ if (debug_pagealloc_enabled()) {
+ linear_map_hash_count = memblock_end_of_DRAM() >> PAGE_SHIFT;
+ linear_map_hash_slots = __va(memblock_alloc_base(
+ linear_map_hash_count, 1, ppc64_rma_size));
+ memset(linear_map_hash_slots, 0, linear_map_hash_count);
+ }
#endif /* CONFIG_DEBUG_PAGEALLOC */
/* On U3 based machines, we need to reserve the DART area and
diff -puN arch/powerpc/mm/init_32.c~powerpc-query-dynamic-debug_pagealloc-setting arch/powerpc/mm/init_32.c
--- a/arch/powerpc/mm/init_32.c~powerpc-query-dynamic-debug_pagealloc-setting
+++ a/arch/powerpc/mm/init_32.c
@@ -112,10 +112,10 @@ void __init MMU_setup(void)
if (strstr(boot_command_line, "noltlbs")) {
__map_without_ltlbs = 1;
}
-#ifdef CONFIG_DEBUG_PAGEALLOC
- __map_without_bats = 1;
- __map_without_ltlbs = 1;
-#endif
+ if (debug_pagealloc_enabled()) {
+ __map_without_bats = 1;
+ __map_without_ltlbs = 1;
+ }
}
/*
_
Patches currently in -mm which might be from iamjoonsoo.kim@xxxxxxx are
mm-slab-fix-stale-code-comment.patch
mm-slab-remove-useless-structure-define.patch
mm-slab-remove-the-checks-for-slab-implementation-bug.patch
mm-slab-activate-debug_pagealloc-in-slab-when-it-is-actually-enabled.patch
mm-slab-use-more-appropriate-condition-check-for-debug_pagealloc.patch
mm-slab-clean-up-debug_pagealloc-processing-code.patch
mm-slab-alternative-implementation-for-debug_slab_leak.patch
mm-slab-remove-object-status-buffer-for-debug_slab_leak.patch
mm-slab-put-the-freelist-at-the-end-of-slab-page.patch
mm-slab-align-cache-size-first-before-determination-of-off_slab-candidate.patch
mm-slab-clean-up-cache-type-determination.patch
mm-slab-do-not-change-cache-size-if-debug-pagealloc-isnt-possible.patch
mm-slab-make-criteria-for-off-slab-determination-robust-and-simple.patch
mm-slab-factor-out-slab-list-fixup-code.patch
mm-slab-factor-out-debugging-initialization-in-cache_init_objs.patch
mm-slab-introduce-new-slab-management-type-objfreelist_slab.patch
mm-slab-introduce-new-slab-management-type-objfreelist_slab-fix.patch
mm-slab-re-implement-pfmemalloc-support.patch
mm-slub-support-left-red-zone.patch
mm-compaction-fix-invalid-free_pfn-and-compact_cached_free_pfn.patch
mm-compaction-pass-only-pageblock-aligned-range-to-pageblock_pfn_to_page.patch
mm-compaction-speed-up-pageblock_pfn_to_page-when-zone-is-contiguous.patch
mm-vmalloc-query-dynamic-debug_pagealloc-setting.patch
mm-slub-query-dynamic-debug_pagealloc-setting.patch
mm-slub-query-dynamic-debug_pagealloc-setting-v2.patch
sound-query-dynamic-debug_pagealloc-setting.patch
powerpc-query-dynamic-debug_pagealloc-setting.patch
tile-query-dynamic-debug_pagealloc-setting.patch
--
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