block: unify request timeout handling
Right now SCSI and others do their own command timeout handling.
Move those bits to the block layer.
Instead of having a timer per command, we try to be a bit more clever
and simply have one per-queue. This avoids the overhead of having to
tear down and setup a timer for each command, so it will result in a lot
less timer fiddling.
Signed-off-by: Mike Anderson <andmike@linux.vnet.ibm.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/block/Makefile b/block/Makefile
index 0da976c..bfe7304 100644
--- a/block/Makefile
+++ b/block/Makefile
@@ -4,8 +4,8 @@
obj-$(CONFIG_BLOCK) := elevator.o blk-core.o blk-tag.o blk-sysfs.o \
blk-barrier.o blk-settings.o blk-ioc.o blk-map.o \
- blk-exec.o blk-merge.o blk-softirq.o ioctl.o genhd.o \
- scsi_ioctl.o cmd-filter.o
+ blk-exec.o blk-merge.o blk-softirq.o blk-timeout.o \
+ ioctl.o genhd.o scsi_ioctl.o cmd-filter.o
obj-$(CONFIG_BLK_DEV_BSG) += bsg.o
obj-$(CONFIG_IOSCHED_NOOP) += noop-iosched.o