diff options
| author |   Wei Yang <richardw.yang@linux.intel.com> | 2020-01-30 22:14:35 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-01-31 10:30:39 -0800 |
| commit | afb971729a0bca7676606013e913025bc5619301 (patch) | |
| tree | d625d921deb159a523da36eb14abd0d7f0012fd4 /mm | |
| parent | mm/huge_memory.c: use head to emphasize the purpose of page (diff) | |
| download | linux-dev-afb971729a0bca7676606013e913025bc5619301.tar.xz linux-dev-afb971729a0bca7676606013e913025bc5619301.zip | |
mm/huge_memory.c: reduce critical section protected by split_queue_lock
split_queue_lock protects data in struct deferred_split. We can release
the lock after delete the page from deferred_split_queue.
This patch moves the THP accounting out of the lock protection, which is
introduced in commit 65c453778aea ("mm, rmap: account shmem thp pages").
Link: http://lkml.kernel.org/r/20200110025516.23996-1-richardw.yang@linux.intel.com
Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/huge_memory.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 4439e91f8443..5b2876942639 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2799,6 +2799,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list) ds_queue->split_queue_len--; list_del(page_deferred_list(head)); } + spin_unlock(&ds_queue->split_queue_lock); if (mapping) { if (PageSwapBacked(head)) __dec_node_page_state(head, NR_SHMEM_THPS); @@ -2806,7 +2807,6 @@ int split_huge_page_to_list(struct page *page, struct list_head *list) __dec_node_page_state(head, NR_FILE_THPS); } - spin_unlock(&ds_queue->split_queue_lock); __split_huge_page(page, list, end, flags); if (PageSwapCache(head)) { swp_entry_t entry = { .val = page_private(head) }; |