block: add notion of a chunk size for request merging

Browse source

Some drivers have different limits on what size a request should
optimally be, depending on the offset of the request. Similar to
dividing a device into chunks. Add a setting that allows the driver
to inform the block layer of such a chunk size. The block layer will
then prevent merging across the chunks.

This is needed to optimally support NVMe with a non-zero stripe size.

Signed-off-by: Jens Axboe <axboe@fb.com>

...

This commit is contained in:

Jens Axboe 2014-06-05 13:38:39 -06:00

parent 046f153343

commit 762380ad93

3 changed files with 41 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

3

block/bio.c

View file

18

block/blk-settings.c

View file

22

include/linux/blkdev.h

View file