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| author | Jan Kara <jack@suse.cz> | 2010-01-06 17:20:35 +0100 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2010-03-05 00:20:19 +0100 |
| commit | 26245c949c8473ea7352907b5a54bc34487eb87f (patch) | |
| tree | 1b20554c273b42f179f96a8beca9d9314e652847 /Documentation | |
| parent | 3a5b27bf6f29574d667230c7e76e4b83fe3014e0 (diff) | |
| download | op-kernel-dev-26245c949c8473ea7352907b5a54bc34487eb87f.zip op-kernel-dev-26245c949c8473ea7352907b5a54bc34487eb87f.tar.gz | |
quota: Cleanup S_NOQUOTA handling
Cleanup handling of S_NOQUOTA inode flag and document it a bit. The flag
does not have to be set under dqptr_sem. Only functions modifying inode's
dquot pointers have to check the flag under dqptr_sem before going forward
with the modification. This way we are sure that we cannot add new dquot
pointers to the inode which is just becoming a quota file.
The good thing about this cleanup is that there are no more places in quota
code which enforce i_mutex vs. dqptr_sem lock ordering (in particular that
dqptr_sem -> i_mutex of quota file). This should silence some (false) lockdep
warnings with ext4 + quota and generally make life of some filesystems easier.
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions
