The patch titled
Subject: mm-fix-slab-page-flags-corruption-fix
has been added to the -mm tree. Its filename is
mm-fix-slab-page-flags-corruption-fix.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** 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: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-fix-slab-page-flags-corruption-fix
tweak comment text, fix comment layout, fix label indenting
Cc: Amey Bhide <abhide@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
Cc: Pravin B Shelar <pshelar@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/swap.c | 21 +++++++++++----------
1 file changed, 11 insertions(+), 10 deletions(-)
diff -puN mm/swap.c~mm-fix-slab-page-flags-corruption-fix mm/swap.c
--- a/mm/swap.c~mm-fix-slab-page-flags-corruption-fix
+++ a/mm/swap.c
@@ -83,13 +83,14 @@ static void put_compound_page(struct pag
get_page_unless_zero(page_head))) {
unsigned long flags;
- /* THP can not break up slab pages, avoid taking
- * compound_lock(). Slab prefer non atomic bit ops
- * on page->flags for better performance. In particular
- * slab_unlock() in slub used to be a hot path
- * item. It is still hot on arches that do not support
- * this_cpu_cmpxchg_double. */
-
+ /*
+ * THP can not break up slab pages so avoid taking
+ * compound_lock(). Slab performs non-atomic bit ops
+ * on page->flags for better performance. In particular
+ * slab_unlock() in slub used to be a hot path. It is
+ * still hot on arches that do not support
+ * this_cpu_cmpxchg_double().
+ */
if (PageSlab(page_head)) {
if (PageTail(page)) {
if (put_page_testzero(page_head))
@@ -110,10 +111,10 @@ static void put_compound_page(struct pag
if (unlikely(!PageTail(page))) {
/* __split_huge_page_refcount run before us */
compound_unlock_irqrestore(page_head, flags);
- skip_lock:
+skip_lock:
if (put_page_testzero(page_head))
__put_single_page(page_head);
- out_put_single:
+out_put_single:
if (put_page_testzero(page))
__put_single_page(page);
return;
@@ -134,7 +135,7 @@ static void put_compound_page(struct pag
VM_BUG_ON(atomic_read(&page->_count) != 0);
compound_unlock_irqrestore(page_head, flags);
- skip_lock_tail:
+skip_lock_tail:
if (put_page_testzero(page_head)) {
if (PageHead(page_head))
__put_compound_page(page_head);
_
Subject: Subject: mm-fix-slab-page-flags-corruption-fix
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
origin.patch
linux-next.patch
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
drivers-block-nvmec-stop-breaking-my-i386-build.patch
drivers-staging-zsmalloc-zsmalloc-mainc-unbork.patch
arch-x86-platform-iris-irisc-register-a-platform-device-and-a-platform-driver.patch
thermal-add-generic-cpufreq-cooling-implementation-fix.patch
thermal-exynos5-add-exynos5-thermal-sensor-driver-support-fix.patch
thermal-exynos-register-the-tmu-sensor-with-the-kernel-thermal-layer-fix.patch
fs-symlink-restrictions-on-sticky-directories.patch
fs-hardlink-creation-restrictions.patch
mm.patch
hugetlb-use-mmu_gather-instead-of-a-temporary-linked-list-for-accumulating-pages-fix.patch
hugetlb-use-mmu_gather-instead-of-a-temporary-linked-list-for-accumulating-pages-fix-fix.patch
memcg-add-hugetlb-extension-fix-fix.patch
hugetlbfs-add-memcg-control-files-for-hugetlbfs-use-scnprintf-instead-of-sprintf-fix.patch
memcg-move-hugetlb-resource-count-to-parent-cgroup-on-memcg-removal-fix.patch
memcg-move-hugetlb-resource-count-to-parent-cgroup-on-memcg-removal-fix-fix.patch
hugetlb-migrate-memcg-info-from-oldpage-to-new-page-during-migration-fix.patch
mm-mmapc-find_vma-remove-unnecessary-ifmm-check-fix.patch
mm-correctly-synchronize-rss-counters-at-exit-exec.patch
mm-do_migrate_pages-calls-migrate_to_node-even-if-task-is-already-on-a-correct-node-fix.patch
mm-do_migrate_pages-rename-arguments.patch
mm-memcg-count-pte-references-from-every-member-of-the-reclaimed-hierarchy-fix.patch
mm-rename-is_mlocked_vma-to-mlocked_vma_newpage-fix.patch
mm-page_allocc-remove-pageblock_default_order.patch
mm-remove-sparsemem-allocation-details-from-the-bootmem-allocator-fix.patch
mm-page_allocc-cleanups.patch
mm-fix-slab-page-flags-corruption-fix.patch
mm-push-lru-index-into-shrink_active_list-fix.patch
memcg-fix-error-code-in-hugetlb_force_memcg_empty-v2-checkpatch-fixes.patch
mm-memcg-print-statistics-from-live-counters-checkpatch-fixes.patch
memcg-always-free-struct-memcg-through-schedule_work-fix.patch
memcg-decrement-static-keys-at-real-destroy-time-v6-fix.patch
security-keys-keyctlc-suppress-memory-allocation-failure-warning.patch
isdn-add-missing-kern_cont-fix.patch
nmi-watchdog-fix-for-lockup-detector-breakage-on-resume-fix.patch
nmi-watchdog-fix-for-lockup-detector-breakage-on-resume-fix-fix.patch
nmi-watchdog-fix-for-lockup-detector-breakage-on-resume-v2-fix.patch
kernel-irq-managec-use-the-pr_foo-infrastructure-to-prefix-printks.patch
vsprintf-correctly-handle-width-when-flag-used-in-%p-format-checkpatch-fixes.patch
vsprintf-further-optimize-decimal-conversion-checkpatch-fixes.patch
drivers-video-backlight-apple_blc-include-header-for-exported-symbol-prototypes-fix.patch
backlight-add-lm3533-backlight-driver-fix.patch
backlight-add-lm3533-backlight-driver-fix-fix.patch
backlight-use-pr_warn-and-pr_debug-instead-of-printk-fix.patch
backlight-apple_bl-use-pr_debug-pr_err-instead-of-printk-fix.patch
backlight-cr_bllcd-use-pr_err-pr_info-instead-of-printk-fix.patch
backlight-generic_bl-use-pr_info-instead-of-printk-fix.patch
backlight-jornada720-use-pr_err-pr_info-instead-of-printk-fix.patch
backlight-omap1-use-pr_info-instead-of-printk-fix.patch
backlight-progear-use-pr_err-instead-of-printk-fix.patch
leds-led-module-for-da9052-53-pmic-v2-fix.patch
leds-add-led-driver-for-lm3556-chip-checkpatch-fixes.patch
leds-add-led-driver-for-lm3556-chip-fix-fix.patch
leds-heartbeat-stop-on-shutdown-checkpatch-fixes.patch
drivers-leds-leds-pca955xc-fix-race-condition-while-setting-brightness-on-several-leds-fix.patch
lib-string_helpersc-make-arrays-static.patch
lib-bitmapc-fix-documentation-for-scnprintf-functions.patch
drivers-rtc-rtc-pcf8563c-add-rtc_vl_read-rtc_vl_clr-ioctl-feature-fix.patch
rtc-rename-config_rtc_mxc-to-config_rtc_drv_mxc-fix.patch
kmod-avoid-deadlock-by-recursive-kmod-call.patch
proc-clean-up-proc-pid-environ-handling-checkpatch-fixes.patch
kernel-cpuc-document-clear_tasks_mm_cpumask.patch
kernel-cpuc-document-clear_tasks_mm_cpumask-fix.patch
ipc-mqueue-improve-performance-of-send-recv-fix.patch
ipc-mqueue-correct-mq_attr_ok-test-fix.patch
ipc-mqueue-strengthen-checks-on-mqueue-creation-fix.patch
tools-selftests-add-mq_perf_tests-checkpatch-fixes.patch
ipc-mqueue-add-rbtree-node-caching-support-checkpatch-fixes.patch
pidns-make-killed-children-autoreap-checkpatch-fixes.patch
pidns-guarantee-that-the-pidns-init-will-be-the-last-pidns-process-reaped-v2-fix.patch
fs-nls-add-apple-nls-fix.patch
eventfd-change-int-to-__u64-in-eventfd_signal-fix.patch
syscalls-x86-add-__nr_kcmp-syscall-v8.patch
syscalls-x86-add-__nr_kcmp-syscall-v8-comment-update-fix.patch
c-r-prctl-simplify-pr_set_mm-on-mm-code-data-assignment-fix.patch
c-r-prctl-add-ability-to-get-clear_tid_address.patch
notify_change-check-that-i_mutex-is-held.patch
journal_add_journal_head-debug.patch
mutex-subsystem-synchro-test-module-fix.patch
slab-leaks3-default-y.patch
put_bh-debug.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
