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| author | Jan Kara <jack@suse.cz> | 2011-05-24 11:52:40 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-05-24 11:52:40 -0400 |
| commit | 81be12c8179c1c397d3f179cdd9b3f7146cf47f1 (patch) | |
| tree | b535687e88af17fc6b25329decf28563ed519395 /include/linux/jbd2.h | |
| parent | b221349fa8b45d13c3650089f0514df7d1eb36c3 (diff) | |
| download | lwn-81be12c8179c1c397d3f179cdd9b3f7146cf47f1.tar.gz lwn-81be12c8179c1c397d3f179cdd9b3f7146cf47f1.zip | |
jbd2: fix sending of data flush on journal commit
In data=ordered mode, it's theoretically possible (however rare) that
an inode is filed to transaction's t_inode_list and a flusher thread
writes all the data and inode is reclaimed before the transaction
starts to commit. In such a case, we could erroneously omit sending a
flush to file system device when it is different from the journal
device (because data can still be in disk cache only).
Fix the problem by setting a flag in a transaction when some inode is added
to it and then send disk flush in the commit code when the flag is set.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'include/linux/jbd2.h')
| -rw-r--r-- | include/linux/jbd2.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index a32dcaec04e1..4d57955061f4 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -658,7 +658,9 @@ struct transaction_s * waiting for it to finish. */ unsigned int t_synchronous_commit:1; - unsigned int t_flushed_data_blocks:1; + + /* Disk flush needs to be sent to fs partition [no locking] */ + int t_need_data_flush; /* * For use by the filesystem to store fs-specific data |