Commit 06d3eff6 authored by Kirill A. Shutemov's avatar Kirill A. Shutemov Committed by Linus Torvalds

mm/thp: fix node page state in split_huge_page_to_list()

Make sure split_huge_page_to_list() handles the state of shmem THP and
file THP properly.

Link: http://lkml.kernel.org/r/20191017164223.2762148-3-songliubraving@fb.com
Fixes: 60fbf0ab ("mm,thp: stats for file backed THP")
Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: default avatarSong Liu <songliubraving@fb.com>
Tested-by: default avatarSong Liu <songliubraving@fb.com>
Acked-by: default avatarYang Shi <yang.shi@linux.alibaba.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 2be5fbf9
...@@ -2789,8 +2789,13 @@ int split_huge_page_to_list(struct page *page, struct list_head *list) ...@@ -2789,8 +2789,13 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
ds_queue->split_queue_len--; ds_queue->split_queue_len--;
list_del(page_deferred_list(head)); list_del(page_deferred_list(head));
} }
if (mapping) if (mapping) {
__dec_node_page_state(page, NR_SHMEM_THPS); if (PageSwapBacked(page))
__dec_node_page_state(page, NR_SHMEM_THPS);
else
__dec_node_page_state(page, NR_FILE_THPS);
}
spin_unlock(&ds_queue->split_queue_lock); spin_unlock(&ds_queue->split_queue_lock);
__split_huge_page(page, list, end, flags); __split_huge_page(page, list, end, flags);
if (PageSwapCache(head)) { if (PageSwapCache(head)) {
......
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