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block: unify request timeout handling

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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>
This commit is contained in:
Jens Axboe
2008-09-14 05:55:09 -07:00
parent 608aeef17a
commit 242f9dcb8b
39 changed files with 399 additions and 339 deletions
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2
drivers/scsi/libsas/sas_internal.h
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@ -55,7 +55,7 @@ void sas_unregister_phys(struct sas_ha_struct *sas_ha);
int sas_register_ports(struct sas_ha_struct *sas_ha);
void sas_unregister_ports(struct sas_ha_struct *sas_ha);
enum scsi_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *);
enum blk_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *);
int sas_init_queue(struct sas_ha_struct *sas_ha);
int sas_init_events(struct sas_ha_struct *sas_ha);