Subject: + mm-per-thread-vma-caching-fix-fix.patch added to -mm tree
To: akpm@xxxxxxxxxxxxxxxxxxxx,davidlohr@xxxxxx,riel@xxxxxxxxxx,torvalds@xxxxxxxxxxxxxxxxxxxx,walken@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 04 Mar 2014 12:00:33 -0800
The patch titled
Subject: mm-per-thread-vma-caching-fix-fix
has been added to the -mm tree. Its filename is
mm-per-thread-vma-caching-fix-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-per-thread-vma-caching-fix-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-per-thread-vma-caching-fix-fix.patch
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From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-per-thread-vma-caching-fix-fix
document vmacache_valid() logic
Cc: Davidlohr Bueso <davidlohr@xxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Michel Lespinasse <walken@xxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmacache.c | 6 ++++++
1 file changed, 6 insertions(+)
diff -puN mm/vmacache.c~mm-per-thread-vma-caching-fix-fix mm/vmacache.c
--- a/mm/vmacache.c~mm-per-thread-vma-caching-fix-fix
+++ a/mm/vmacache.c
@@ -40,6 +40,12 @@ static bool vmacache_valid(struct mm_str
{
struct task_struct *curr = current;
+ /*
+ * This task may be accessing a foreign mm via (for example)
+ * get_user_pages()->find_vma(). The vmacache is task-local and this
+ * task's vmacache pertains to a different mm (ie, its own). There is
+ * nothing we can do here.
+ */
if (mm != curr->mm)
return false;
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
origin.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
i-need-old-gcc.patch
maintainers-akpm-maintenance.patch
input-route-kbd-leds-through-the-generic-leds-layer.patch
ocfs2-add-dlm_recover_callback_support-in-sysfs-fix.patch
ocfs2-flock-drop-cross-node-lock-when-failed-locally-checkpatch-fixes.patch
mm.patch
mm-hugetlb-improve-page-fault-scalability-fix.patch
mm-vmstat-fix-up-zone-state-accounting-fix.patch
mm-keep-page-cache-radix-tree-nodes-in-check-fix-fix.patch
mm-process_vm_accessc-mark-function-as-static-fix.patch
mm-hugetlbfs-fix-rmapping-for-anonymous-hugepages-with-page_pgoff-v3-fix.patch
pagewalk-update-page-table-walker-core-fix-end-address-calculation-in-walk_page_range-fix.patch
pagewalk-remove-argument-hmask-from-hugetlb_entry-fix-fix.patch
mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
drop_caches-add-some-documentation-and-info-message.patch
mmnuma-reorganize-change_pmd_range-fix.patch
drivers-lguest-page_tablesc-rename-do_set_pte.patch
mm-add-debugfs-tunable-for-fault_around_order-checkpatch-fixes.patch
mm-per-thread-vma-caching-fix.patch
mm-per-thread-vma-caching-fix-fix.patch
zram-use-zcomp-compressing-backends-fix.patch
do_shared_fault-check-that-mmap_sem-is-held.patch
include-linux-syscallsh-add-sys32_quotactl-prototype-fix.patch
sys_sysfs-add-config_sysfs_syscall-fix.patch
kernel-groupsc-remove-return-value-of-set_groups-fix.patch
ncpfs-convert-dprintk-ddprintk-to-ncp_dbg-fix.patch
ncpfs-convert-dprintk-ddprintk-to-ncp_dbg-fix-fix.patch
hfsplus-fix-concurrent-acess-of-alloc_blocks-fix.patch
hfsplus-fix-concurrent-acess-of-alloc_blocks-fix-fix.patch
kmod-run-usermodehelpers-only-on-cpus-allowed-for-kthreadd-v2-fix.patch
kmod-run-usermodehelpers-only-on-cpus-allowed-for-kthreadd-v2-checkpatch-fixes.patch
include-linux-crash_dumph-add-vmcore_cleanup-prototype-fix.patch
kernel-panicc-display-reason-at-end-pr_emerg-fix.patch
fault-injection-set-bounds-on-what-proc-self-make-it-fail-accepts-fix.patch
initramfs-debug-detected-compression-method-fix.patch
linux-next.patch
debugging-keep-track-of-page-owners.patch
journal_add_journal_head-debug.patch
kernel-forkc-export-kernel_thread-to-modules.patch
mutex-subsystem-synchro-test-module.patch
slab-leaks3-default-y.patch
put_bh-debug.patch
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