ee1b6f7aff94019c09e73837054979063f722046 - linux

commit	ee1b6f7aff94019c09e73837054979063f722046	[log] [tgz]
author	Shaohua Li <shli@fb.com>	Thu Jan 15 17:32:25 2015 -0800
committer	Jens Axboe <axboe@fb.com>	Fri Jan 23 14:15:46 2015 -0700
tree	79c7b943d7c6d62fec1874afd2c50964de054aa0
parent	bb5c3cdda37aad22996d6da2addd58cadc0436c0 [diff]

block: support different tag allocation policy

The libata tag allocation is using a round-robin policy. Next patch will
make libata use block generic tag allocation, so let's add a policy to
tag allocation.

Currently two policies: FIFO (default) and round-robin.

Cc: Jens Axboe <axboe@fb.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

block/blk-tag.c[diff]
drivers/block/osdblk.c[diff]
drivers/scsi/scsi_scan.c[diff]
include/linux/blkdev.h[diff]
include/scsi/scsi_host.h[diff]
include/scsi/scsi_tcq.h[diff]

6 files changed

tree: 79c7b943d7c6d62fec1874afd2c50964de054aa0