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author | Mike Snitzer | 2013-04-05 16:36:34 +0200 |
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committer | Alasdair G Kergon | 2013-04-05 16:36:34 +0200 |
commit | 19b0092e265fe9ab129902373c3127c0e0be3376 (patch) | |
tree | 1aae9fbcc44e25af28816cb317c684cbd259e503 /drivers/scsi/sym53c8xx_2/sym_glue.h | |
parent | dm cache: fix writes to cache device in writethrough mode (diff) | |
download | kernel-qcow2-linux-19b0092e265fe9ab129902373c3127c0e0be3376.tar.gz kernel-qcow2-linux-19b0092e265fe9ab129902373c3127c0e0be3376.tar.xz kernel-qcow2-linux-19b0092e265fe9ab129902373c3127c0e0be3376.zip |
dm cache: reduce bio front_pad size in writeback mode
A recent patch to fix the dm cache target's writethrough mode extended
the bio's front_pad to include a 1056-byte struct dm_bio_details.
Writeback mode doesn't need this, so this patch reduces the
per_bio_data_size to 16 bytes in this case instead of 1096.
The dm_bio_details structure was added in "dm cache: fix writes to
cache device in writethrough mode" which fixed commit e2e74d617e ("dm
cache: fix race in writethrough implementation"). In writeback mode
we avoid allocating the writethrough-specific members of the
per_bio_data structure (the dm_bio_details structure included).
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/scsi/sym53c8xx_2/sym_glue.h')
0 files changed, 0 insertions, 0 deletions