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f2fs: fix to avoid potential deadlock

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[ Upstream commit df77fbd8c5b222c680444801ffd20e8bbc90a56e ]

Using f2fs_trylock_op() in f2fs_write_compressed_pages() to avoid potential
deadlock like we did in f2fs_write_single_data_page().

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chao Yu 2022-01-27 13:44:49 +08:00 committed by Greg Kroah-Hartman
parent 005f9cdab7
commit 0478ccdc8e
2 changed files with 10 additions and 2 deletions
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6
fs/f2fs/data.c
View File

@ -2467,8 +2467,12 @@ static int __f2fs_write_data_pages(struct address_space *mapping,
/* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */
if (wbc->sync_mode == WB_SYNC_ALL)
atomic_inc(&sbi->wb_sync_req[DATA]);
else if (atomic_read(&sbi->wb_sync_req[DATA]))
else if (atomic_read(&sbi->wb_sync_req[DATA])) {
/* to avoid potential deadlock */
if (current->plug)
blk_finish_plug(current->plug);
goto skip_write;
}
if (__should_serialize_io(inode, wbc)) {
mutex_lock(&sbi->writepages);

6
fs/f2fs/node.c
View File

@ -1995,8 +1995,12 @@ static int f2fs_write_node_pages(struct address_space *mapping,
if (wbc->sync_mode == WB_SYNC_ALL)
atomic_inc(&sbi->wb_sync_req[NODE]);
else if (atomic_read(&sbi->wb_sync_req[NODE]))
else if (atomic_read(&sbi->wb_sync_req[NODE])) {
/* to avoid potential deadlock */
if (current->plug)
blk_finish_plug(current->plug);
goto skip_write;
}
trace_f2fs_writepages(mapping->host, wbc, NODE);