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| author | Kazuya Mio <k-mio@sx.jp.nec.com> | 2011-10-20 19:23:08 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-10-20 19:23:08 -0400 |
| commit | 8de49e674a1133ab8998914a6e933ceb4b5f4b07 (patch) | |
| tree | 19d7d5de54b166f0d4e0ea9f57d6bcf0b451e52b /fs/ext4/inode.c | |
| parent | 09e0834fb0ce1ea2a63885177015bd5d7d2bc22d (diff) | |
| download | linux-8de49e674a1133ab8998914a6e933ceb4b5f4b07.tar.gz linux-8de49e674a1133ab8998914a6e933ceb4b5f4b07.tar.bz2 linux-8de49e674a1133ab8998914a6e933ceb4b5f4b07.zip | |
ext4: fix the deadlock in mpage_da_map_and_submit()
If ext4_jbd2_file_inode() in mpage_da_map_and_submit() fails due to
journal abort, this function returns to caller without unlocking the
page. It leads to the deadlock, and the patch fixes this issue by
calling mpage_da_submit_io().
Signed-off-by: Kazuya Mio <k-mio@sx.jp.nec.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/inode.c')
| -rw-r--r-- | fs/ext4/inode.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index ecb572591924..ff6aace0bb3c 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1552,9 +1552,11 @@ static void mpage_da_map_and_submit(struct mpage_da_data *mpd) if (ext4_should_order_data(mpd->inode)) { err = ext4_jbd2_file_inode(handle, mpd->inode); - if (err) + if (err) { /* Only if the journal is aborted */ - return; + mpd->retval = err; + goto submit_io; + } } } @@ -2294,11 +2296,12 @@ retry: ret = 0; } else if (ret == MPAGE_DA_EXTENT_TAIL) { /* - * got one extent now try with - * rest of the pages + * Got one extent now try with rest of the pages. + * If mpd.retval is set -EIO, journal is aborted. + * So we don't need to write any more. */ pages_written += mpd.pages_written; - ret = 0; + ret = mpd.retval; io_done = 1; } else if (wbc->nr_to_write) /* |