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author	Shaohua Li <shli@fb.com>
	Fri, 16 Jan 2015 01:32:25 +0000 (17:32 -0800)
committer	Jens Axboe <axboe@fb.com>
	Fri, 23 Jan 2015 21:15:46 +0000 (14:15 -0700)
commit	ee1b6f7aff94019c09e73837054979063f722046
tree	79c7b943d7c6d62fec1874afd2c50964de054aa0	tree \| snapshot (tar.gz zip)
parent	bb5c3cdda37aad22996d6da2addd58cadc0436c0	commit \| 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 \| blob \| blame \| history
drivers/block/osdblk.c		diff \| blob \| blame \| history
drivers/scsi/scsi_scan.c		diff \| blob \| blame \| history
include/linux/blkdev.h		diff \| blob \| blame \| history
include/scsi/scsi_host.h		diff \| blob \| blame \| history
include/scsi/scsi_tcq.h		diff \| blob \| blame \| history

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