The patch titled Subject: mm-compaction-acquire-the-zone-lru_lock-as-late-as-possible-fix has been added to the -mm tree. Its filename is mm-compaction-acquire-the-zone-lru_lock-as-late-as-possible-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: Minchan Kim <minchan@xxxxxxxxxx> Subject: mm-compaction-acquire-the-zone-lru_lock-as-late-as-possible-fix augment comment Cc: Mel Gorman <mgorman@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/compaction.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff -puN mm/compaction.c~mm-compaction-acquire-the-zone-lru_lock-as-late-as-possible-fix mm/compaction.c --- a/mm/compaction.c~mm-compaction-acquire-the-zone-lru_lock-as-late-as-possible-fix +++ a/mm/compaction.c @@ -415,7 +415,8 @@ isolate_migratepages_range(struct zone * * 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. + * transhuge or hugetlbfs page because calling compound_order() + * requires lru_lock to exclude isolation and splitting. */ if (PageTransHuge(page)) { if (!locked) _ Patches currently in -mm which might be from minchan@xxxxxxxxxx are linux-next.patch mm-remove-__gfp_no_kswapd.patch mm-fix-nonuniform-page-status-when-writing-new-file-with-small-buffer.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-compaction-update-comment-in-try_to_compact_pages.patch mm-vmscan-scale-number-of-pages-reclaimed-by-reclaim-compaction-based-on-failures.patch mm-vmscan-scale-number-of-pages-reclaimed-by-reclaim-compaction-based-on-failures-fix.patch mm-compaction-capture-a-suitable-high-order-page-immediately-when-it-is-made-available.patch mm-cma-discard-clean-pages-during-contiguous-allocation-instead-of-migration.patch mm-cma-discard-clean-pages-during-contiguous-allocation-instead-of-migration-fix.patch mm-cma-discard-clean-pages-during-contiguous-allocation-instead-of-migration-fix-fix.patch mm-fix-tracing-in-free_pcppages_bulk.patch mm-fix-tracing-in-free_pcppages_bulk-fix.patch cma-fix-counting-of-isolated-pages.patch cma-count-free-cma-pages.patch cma-count-free-cma-pages-fix.patch cma-fix-watermark-checking.patch cma-fix-watermark-checking-fix.patch mm-page_alloc-use-get_freepage_migratetype-instead-of-page_private.patch mm-remain-migratetype-in-freed-page.patch memory-hotplug-bug-fix-race-between-isolation-and-allocation.patch memory-hotplug-fix-pages-missed-by-race-rather-than-failing.patch memory-hotplug-fix-pages-missed-by-race-rather-than-failng-fix.patch swap-add-a-simple-detector-for-inappropriate-swapin-readahead.patch swap-add-a-simple-detector-for-inappropriate-swapin-readahead-fix.patch mm-memblock-reduce-overhead-in-binary-search.patch mm-memblock-use-existing-interface-to-set-nid.patch mm-memblock-cleanup-early_node_map-related-comments.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-move-fatal-signal-check-out-of-compact_checklock_irqsave.patch mm-compaction-acquire-the-zone-lru_lock-as-late-as-possible-fix.patch mm-compaction-acquire-the-zone-lock-as-late-as-possible.patch revert-mm-have-order-0-compaction-start-off-where-it-left.patch mm-page_alloc-refactor-out-__alloc_contig_migrate_alloc.patch mm-page_alloc-refactor-out-__alloc_contig_migrate_alloc-checkpatch-fixes.patch memory-hotplug-dont-replace-lowmem-pages-with-highmem.patch mm-enable-config_compaction-by-default.patch mm-numa-reclaim-from-all-nodes-within-reclaim-distance.patch mm-numa-reclaim-from-all-nodes-within-reclaim-distance-fix.patch mm-revert-0def08e3-mm-mempolicyc-check-return-code-of-check_range.patch mm-revert-0def08e3-mm-mempolicyc-check-return-code-of-check_range-fix.patch memory-hotplug-fix-zone-stat-mismatch.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