Skip writeback meta pages if cp_mutex lock acquire failed, cp will
flush dirty pages instead.
Signed-off-by: Yunlei He <heyun...@huawei.com>
---
fs/f2fs/checkpoint.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 0339daf..5ce24b1 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -275,13 +275,15 @@ 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)) {
+ diff = nr_pages_to_write(sbi, META, wbc);
+ written = sync_meta_pages(sbi, META, wbc->nr_to_write);
+ } else
+ goto skip_write;
- /* if mounting is failed, skip writing node pages */
- mutex_lock(&sbi->cp_mutex);
- diff = nr_pages_to_write(sbi, META, wbc);
- written = sync_meta_pages(sbi, META, wbc->nr_to_write);
mutex_unlock(&sbi->cp_mutex);
+ trace_f2fs_writepages(mapping->host, wbc, META);
wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
return 0;
--
2.10.1
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