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| author | Mike Snitzer <snitzer@redhat.com> | 2012-10-13 00:02:07 +0400 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2012-10-13 00:02:07 +0400 |
| commit | 28eed34e7662d7602da6753b0ba2563006b8e7a2 (patch) | |
| tree | 0aeeda160b7cccfb77be58d47084a8e606905bf7 /drivers/remoteproc | |
| parent | 0bcf08798eb9fc3cd0fe2e6b74b25f3f57fa8af2 (diff) | |
| download | linux-28eed34e7662d7602da6753b0ba2563006b8e7a2.tar.xz | |
dm thin: support discard with non power of two block size
Support discards when the pool's block size is not a power of 2.
The block layer assumes discard_granularity is a power of 2 (in
blkdev_issue_discard), so we set this to the largest power of 2 that is
a divides into the number of sectors in each block, but never less than
DATA_DEV_BLOCK_SIZE_MIN_SECTORS.
This patch eliminates the "Discard support must be disabled when the
block size is not a power of 2" constraint that was imposed in commit
55f2b8b ("dm thin: support for non power of 2 pool blocksize"). That
commit was incomplete: using a block size that is not a power of 2
shouldn't mean disabling discard support on the device completely.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/remoteproc')
0 files changed, 0 insertions, 0 deletions