The patch titled
Subject: mm-compaction-acquire-the-zone-lru_lock-as-late-as-possible-fix-fix
has been added to the -mm tree. Its filename is
mm-compaction-acquire-the-zone-lru_lock-as-late-as-possible-fix-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-compaction-acquire-the-zone-lru_lock-as-late-as-possible-fix-fix
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/compaction.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff -puN mm/compaction.c~mm-compaction-acquire-the-zone-lru_lock-as-late-as-possible-fix-fix mm/compaction.c
--- a/mm/compaction.c~mm-compaction-acquire-the-zone-lru_lock-as-late-as-possible-fix-fix
+++ a/mm/compaction.c
@@ -414,9 +414,10 @@ isolate_migratepages_range(struct zone *
* splitting and collapsing (collapsing has already happened
* if PageLRU is set) but the lock is not necessarily taken
* here and it is wasteful to take it just to check transhuge.
- * Check transhuge without lock and skip if it's either a
- * transhuge or hugetlbfs page because calling compound_order()
- * requires lru_lock to exclude isolation and splitting.
+ * Check TransHuge without lock and skip the whole pageblock if
+ * it's either a transhuge or hugetlbfs page, as calling
+ * compound_order() without preventing THP from splitting the
+ * page underneath us may return surprising results.
*/
if (PageTransHuge(page)) {
if (!locked)
_
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
cpu_hotplug-unmap-cpu2node-when-the-cpu-is-hotremoved-fix.patch
arch-x86-platform-iris-irisc-register-a-platform-device-and-a-platform-driver.patch
arch-x86-tools-insn_sanityc-identify-source-of-messages.patch
audith-replace-defines-with-c-stubs.patch
audith-replace-defines-with-c-stubs-fix.patch
prctl-use-access_ok-instead-of-task_size-in-prctl_set_mm-fix-fix.patch
mm.patch
x86-pat-separate-the-pfn-attribute-tracking-for-remap_pfn_range-and-vm_insert_pfn-fix.patch
mm-kill-vma-flag-vm_reserved-and-mm-reserved_vm-counter-fix.patch
mm-fix-nonuniform-page-status-when-writing-new-file-with-small-buffer-fix.patch
mm-fix-nonuniform-page-status-when-writing-new-file-with-small-buffer-fix-fix.patch
mm-vmscan-scale-number-of-pages-reclaimed-by-reclaim-compaction-based-on-failures-fix.patch
mm-mmu_notifier-fix-inconsistent-memory-between-secondary-mmu-and-host-fix.patch
rbtree-performance-and-correctness-test-fix.patch
mm-cma-discard-clean-pages-during-contiguous-allocation-instead-of-migration-fix-fix.patch
mm-fix-tracing-in-free_pcppages_bulk-fix.patch
cma-count-free-cma-pages-fix.patch
memory-hotplug-fix-pages-missed-by-race-rather-than-failng-fix.patch
atomic-implement-generic-atomic_dec_if_positive-fix.patch
swap-add-a-simple-detector-for-inappropriate-swapin-readahead-fix.patch
mm-compaction-abort-compaction-loop-if-lock-is-contended-or-run-too-long.patch
mm-compaction-abort-compaction-loop-if-lock-is-contended-or-run-too-long-fix.patch
mm-compaction-abort-compaction-loop-if-lock-is-contended-or-run-too-long-fix-2.patch
mm-compaction-acquire-the-zone-lru_lock-as-late-as-possible-fix-fix.patch
mm-page_alloc-refactor-out-__alloc_contig_migrate_alloc-checkpatch-fixes.patch
mm-fix-invalidate_complete_page2-lock-ordering.patch
mm-numa-reclaim-from-all-nodes-within-reclaim-distance-fix.patch
mm-move-all-mmu-notifier-invocations-to-be-done-outside-the-pt-lock.patch
sections-fix-section-conflicts-in-arch-h8300-checkpatch-fixes.patch
sections-fix-section-conflicts-in-drivers-macintosh-checkpatch-fixes.patch
sectons-fix-const-sections-for-crc32-table-checkpatch-fixes.patch
drivers-misc-lis3lv02d-lis3lv02d_spic-add-dt-matching-table-passthru-code.patch
drivers-misc-lis3lv02d-lis3lv02d_spic-add-lis3lv02d-device-tree-init.patch
drivers-misc-lis3lv02d-lis3lv02d_i2cc-add-lis3lv02d-device-tree-init.patch
backlight-add-backlight-driver-for-lm3630-chip-fix.patch
backlight-add-new-lm3639-backlight-driver-fix.patch
backlight-platform-lcd-add-support-for-device-tree-based-probe-fix.patch
idr-rename-max_level-to-max_idr_level-fix.patch
idr-rename-max_level-to-max_idr_level-fix-fix-2.patch
idr-rename-max_level-to-max_idr_level-fix-3.patch
lib-parserc-avoid-overflow-in-match_number-fix.patch
lib-spinlock_debug-avoid-livelock-in-do_raw_spin_lock-fix.patch
drivers-firmware-dmi_scanc-check-dmi-version-when-get-system-uuid-fix.patch
drivers-firmware-dmi_scanc-fetch-dmi-version-from-smbios-if-it-exists-checkpatch-fixes.patch
rtc-add-dallas-ds2404-driver-fix.patch
rtc-snvs-add-freescale-rtc-snvs-driver-fix.patch
hfsplus-add-support-of-manipulation-by-attributes-file-checkpatch-fixes.patch
fs-fat-fix-all-other-checkpatch-issues-in-dirc-fix.patch
fat-simplify-writeback_inode-checkpatch-fixes.patch
fat-simplify-writeback_inode-checkpatch-fixes-fix.patch
coredump-make-core-dump-functionality-optional-fix-fix.patch
coredump-use-suid_dumpable_enabled-rather-than-hardcoded-1-checkpatch-fixes.patch
proc-use-kzalloc-instead-of-kmalloc-and-memset-fix.patch
journal_add_journal_head-debug.patch
kernel-forkc-export-kernel_thread-to-modules.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
