diff options
| author | Jan Kara <jack@suse.com> | 2015-12-07 14:29:17 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2015-12-07 14:29:17 -0500 |
| commit | 17048e8a083fec7ad841d88ef0812707fbc7e39f (patch) | |
| tree | a5f6ac206edfbe5807e6f9834d6dfe663e9b31c6 /block | |
| parent | ea3d7209ca01da209cda6f0dea8be9cc4b7a933b (diff) | |
| download | linux-17048e8a083fec7ad841d88ef0812707fbc7e39f.tar.bz2 | |
ext4: move unlocked dio protection from ext4_alloc_file_blocks()
Currently ext4_alloc_file_blocks() was handling protection against
unlocked DIO. However we now need to sometimes call it under i_mmap_sem
and sometimes not and DIO protection ranks above it (although strictly
speaking this cannot currently create any deadlocks). Also
ext4_zero_range() was actually getting & releasing unlocked DIO
protection twice in some cases. Luckily it didn't introduce any real bug
but it was a land mine waiting to be stepped on. So move DIO protection
out from ext4_alloc_file_blocks() into the two callsites.
Signed-off-by: Jan Kara <jack@suse.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions