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    Subject[RFC 5/5] truncate: 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: Nick Piggin <npiggin@suse.de>
    Cc: Al Viro <viro@zeniv.linux.org.uk>
    Cc: linux-mm@kvack.org
    Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
    ---
    mm/truncate.c | 1 -
    1 files changed, 0 insertions(+), 1 deletions(-)

    diff --git a/mm/truncate.c b/mm/truncate.c
    index 9ee5673..8decb93 100644
    --- a/mm/truncate.c
    +++ b/mm/truncate.c
    @@ -114,7 +114,6 @@ truncate_complete_page(struct address_space *mapping, struct page *page)
    * calls cleancache_put_page (and note page->mapping is now NULL)
    */
    cleancache_flush_page(mapping, page);
    - page_cache_release(page); /* pagecache ref */
    return 0;
    }

    --
    1.7.0.4


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