b70c864d3c
After the fresh boot: ionice -c3 -p $$ echo cfq >> /sys/block/XXX/queue/scheduler dd if=/dev/XXX of=/dev/null bs=512 count=1 Now dd hangs in D state and the queue is completely stalled for approximately INITIAL_JIFFIES + CFQ_IDLE_GRACE jiffies. This is because cfq_init_queue() forgets to initialize cfq_data->last_end_request. (I guess this patch is not complete, overflow is still possible) Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Jens Axboe <jens.axboe@oracle.com> |
||
|---|---|---|
| .. | ||
| as-iosched.c | ||
| blktrace.c | ||
| bsg.c | ||
| cfq-iosched.c | ||
| compat_ioctl.c | ||
| deadline-iosched.c | ||
| elevator.c | ||
| genhd.c | ||
| ioctl.c | ||
| Kconfig | ||
| Kconfig.iosched | ||
| ll_rw_blk.c | ||
| Makefile | ||
| noop-iosched.c | ||
| scsi_ioctl.c | ||