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authorJens Axboe <axboe@fb.com>2014-06-05 13:38:39 -0600
committerJens Axboe <axboe@fb.com>2014-06-05 13:38:39 -0600
commit762380ad9322951cea4ce9d24864265f9c66a916 (patch)
tree9ec3fe551583dcb9243d02a9728511e99216dcdc /drivers/scsi/st.c
parent046f153343e33dcad1be7f6249ea6ff1c6fd9b58 (diff)
downloadlinux-next-762380ad9322951cea4ce9d24864265f9c66a916.tar.gz
block: add notion of a chunk size for request merging
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>
Diffstat (limited to 'drivers/scsi/st.c')
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