Ming Lei 8a05aa4ce3 mtip32xx: avoid to read HOST_CAP from HW in .queue_rq() ... It is observed reading the register from HW takes a bit long, for example in my box, the following difference of 'perf report --no-children fio ...' can be seen when running I/O: 1) V4.12 without patch + 9.28% fio [mtip32xx] [k] mtip_irq_handler + 8.48% fio [mtip32xx] [k] mtip_init_cmd_header 2) V4.12 with the following patch + 9.14% fio [mtip32xx] [k] mtip_irq_handler ...... + 1.14% fio [mtip32xx] [k] mtip_init_cmd_header IOPS can be increased by ~5% with this patch too. Fixes: a4e84aae8139(mtip32xx: use runtime tag to initialize command header) Signed-off-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2017-07-05 12:11:26 -06:00
..
Kconfig	Remove GENERIC_HARDIRQ config option	2013-09-13 15:09:52 +02:00
Makefile
mtip32xx.c	mtip32xx: avoid to read HOST_CAP from HW in .queue_rq()	2017-07-05 12:11:26 -06:00
mtip32xx.h	mtip32xx: avoid to read HOST_CAP from HW in .queue_rq()	2017-07-05 12:11:26 -06:00