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Alan D. Brunelle ac9fafa124 block: Skip I/O merges when disabled ... The block I/O + elevator + I/O scheduler code spend a lot of time trying to merge I/Os -- rightfully so under "normal" circumstances. However, if one were to know that the incoming I/O stream was /very/ random in nature, the cycles are wasted. This patch adds a per-request_queue tunable that (when set) disables merge attempts (beyond the simple one-hit cache check), thus freeing up a non-trivial amount of CPU cycles. Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>		17 years ago
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Kconfig	…
Kconfig.iosched	…
Makefile	…
as-iosched.c	…
blk-barrier.c	block: rename and export rq_init()	17 years ago
blk-core.c	block: add large command support	17 years ago
blk-exec.c	…
blk-ioc.c	…
blk-map.c	block: add dma alignment and padding support to blk_rq_map_kern	17 years ago
blk-merge.c	block: make queue flags non-atomic	17 years ago
blk-settings.c	block: make queue flags non-atomic	17 years ago
blk-sysfs.c	block: Skip I/O merges when disabled	17 years ago
blk-tag.c	block: make queue flags non-atomic	17 years ago
blk.h	block: rename and export rq_init()	17 years ago
blktrace.c	…
bsg.c	…
cfq-iosched.c	…
compat_ioctl.c	…
deadline-iosched.c	…
elevator.c	block: Skip I/O merges when disabled	17 years ago
genhd.c	…
ioctl.c	…
noop-iosched.c	…
scsi_ioctl.c	block: no need to initialize rq->cmd with blk_get_request	17 years ago