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| author | Yongqiang Yang <xiaoqiangnk@gmail.com> | 2011-11-19 13:34:29 +0400 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2011-11-22 04:20:53 +0400 |
| commit | 8c111b3f56332a216b18cd57950bdf04ac8f2a98 (patch) | |
| tree | 9295744be006082391c9bfeed2cabf43b29cc4ea /fs/jbd/commit.c | |
| parent | 63894ab9f63a688f6b0b8cdd01ac0a9f36d507b8 (diff) | |
| download | linux-8c111b3f56332a216b18cd57950bdf04ac8f2a98.tar.xz | |
jbd: clear revoked flag on buffers before a new transaction started
Currently, we clear revoked flag only when a block is reused. However,
this can tigger a false journal error. Consider a situation when a block
is used as a meta block and is deleted(revoked) in ordered mode, then the
block is allocated as a data block to a file. At this moment, user changes
the file's journal mode from ordered to journaled and truncates the file.
The block will be considered re-revoked by journal because it has revoked
flag still pending from the last transaction and an assertion triggers.
We fix the problem by keeping the revoked status more uptodate - we clear
revoked flag when switching revoke tables to reflect there is no revoked
buffers in current transaction any more.
Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/jbd/commit.c')
| -rw-r--r-- | fs/jbd/commit.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/jbd/commit.c b/fs/jbd/commit.c index 8799207df058..f2b9a571f4cf 100644 --- a/fs/jbd/commit.c +++ b/fs/jbd/commit.c @@ -392,6 +392,12 @@ void journal_commit_transaction(journal_t *journal) jbd_debug (3, "JBD: commit phase 1\n"); /* + * Clear revoked flag to reflect there is no revoked buffers + * in the next transaction which is going to be started. + */ + journal_clear_buffer_revoked_flags(journal); + + /* * Switch to a new revoke table. */ journal_switch_revoke_table(journal); |