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f2fs: fix to commit bio cache after flushing node pages 

In sync_node_pages, we won't check and commit last merged pages in private
bio cache of f2fs, as these pages were taged as writeback, someone who is
waiting for writebacking of the page will be blocked until the cache was
committed by someone else.

We need to commit node type bio cache to avoid potential deadlock or long
delay of waiting writeback.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
hifive-unleashed-5.1
Chao Yu 2016-09-29 18:50:10 +08:00 committed by Jaegeuk Kim
parent fc0065adb2
commit 3f5f4959b1
1 changed files with 16 additions and 2 deletions
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18
fs/f2fs/node.c
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@ -1312,6 +1312,7 @@ int fsync_node_pages(struct f2fs_sb_info *sbi, struct inode *inode,
struct page *last_page = NULL;
bool marked = false;
nid_t ino = inode->i_ino;
int nwritten = 0;
if (atomic) {
last_page = last_fsync_dnode(sbi, ino);
@ -1385,7 +1386,10 @@ continue_unlock:
unlock_page(page);
f2fs_put_page(last_page, 0);
break;
} else {
nwritten++;
}
if (page == last_page) {
f2fs_put_page(page, 0);
marked = true;
@ -1407,6 +1411,9 @@ continue_unlock:
unlock_page(last_page);
goto retry;
}
if (nwritten)
f2fs_submit_merged_bio_cond(sbi, NULL, NULL, ino, NODE, WRITE);
return ret ? -EIO: 0;
}
@ -1416,6 +1423,7 @@ int sync_node_pages(struct f2fs_sb_info *sbi, struct writeback_control *wbc)
struct pagevec pvec;
int step = 0;
int nwritten = 0;
int ret = 0;
pagevec_init(&pvec, 0);
@ -1436,7 +1444,8 @@ next_step:
if (unlikely(f2fs_cp_error(sbi))) {
pagevec_release(&pvec);
return -EIO;
ret = -EIO;
goto out;
}
/*
@ -1487,6 +1496,8 @@ continue_unlock:
if (NODE_MAPPING(sbi)->a_ops->writepage(page, wbc))
unlock_page(page);
else
nwritten++;
if (--wbc->nr_to_write == 0)
break;
@ -1504,7 +1515,10 @@ continue_unlock:
step++;
goto next_step;
}
return nwritten;
out:
if (nwritten)
f2fs_submit_merged_bio(sbi, NODE, WRITE);
return ret;
}
int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino)