From: Yunlei He Date: Wed, 1 Mar 2017 10:07:10 +0000 (+0800) Subject: f2fs: skip writeback meta pages if cp_mutex acquire failed X-Git-Tag: v4.14-rc1~967^2~94 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a29d0e0bc0eeefad2a50a8aa7e3f4b98f72c7feb;p=platform%2Fkernel%2Flinux-rpi.git f2fs: skip writeback meta pages if cp_mutex acquire failed Skip writeback meta pages if cp_mutex lock acquire failed, cp will flush dirty pages instead. Signed-off-by: Yunlei He Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim --- diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 3c3d2d0..22348c7 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -275,10 +275,11 @@ static int f2fs_write_meta_pages(struct address_space *mapping, get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META)) goto skip_write; - trace_f2fs_writepages(mapping->host, wbc, META); + /* if locked failed, cp will flush dirty pages instead */ + if (!mutex_trylock(&sbi->cp_mutex)) + goto skip_write; - /* if mounting is failed, skip writing node pages */ - mutex_lock(&sbi->cp_mutex); + trace_f2fs_writepages(mapping->host, wbc, META); diff = nr_pages_to_write(sbi, META, wbc); written = sync_meta_pages(sbi, META, wbc->nr_to_write); mutex_unlock(&sbi->cp_mutex);