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Subject[RFC 4/5] swap: Remove unnecessary page release
Date
This patch series changes remove_from_page_cache's page ref counting
rule. page cache ref count is decreased in remove_from_page_cache.
So we don't need call again in caller context.

Cc:Hugh Dickins <hughd@google.com>
Cc: linux-mm@kvack.org
Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
---
mm/shmem.c | 1 -
1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index fa9acc9..16800f2 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1091,7 +1091,6 @@ static int shmem_writepage(struct page *page, struct writeback_control *wbc)
spin_unlock(&info->lock);
swap_shmem_alloc(swap);
BUG_ON(page_mapped(page));
- page_cache_release(page); /* pagecache ref */
swap_writepage(page, wbc);
if (inode) {
mutex_lock(&shmem_swaplist_mutex);
--
1.7.0.4


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