On 10/16/2013 09:22 PM, James Bottomley wrote:
On Mon, 2013-07-01 at 08:50 +0200, Hannes Reinecke wrote:
This patchs adds an 'eh_deadline' sysfs attribute to the scsi
host which limits the overall runtime of the SCSI EH.
The 'eh_deadline' value is stored in the now obsolete field
'resetting'.
On Wed, 2013-10-23 at 11:25 +0200, Hannes Reinecke wrote:
On 10/16/2013 09:22 PM, James Bottomley wrote:
On Mon, 2013-07-01 at 08:50 +0200, Hannes Reinecke wrote:
This patchs adds an 'eh_deadline' sysfs attribute to the scsi
host which limits the overall runtime of the SCSI EH.
The
On 10/23/2013 09:46 AM, James Bottomley wrote:
On Wed, 2013-10-23 at 11:25 +0200, Hannes Reinecke wrote:
On 10/16/2013 09:22 PM, James Bottomley wrote:
On Mon, 2013-07-01 at 08:50 +0200, Hannes Reinecke wrote:
This patchs adds an 'eh_deadline' sysfs attribute to the scsi
host which limits the
On Wed, 2013-10-16 at 19:22 +, James Bottomley wrote:
What about instead:
static int scsi_host_eh_past_deadline(struct Scsi_Host *shost, int percent) {
if (!shost-last_reset || !shost-eh_deadline)
return 0;
if (time_before(jiffies,
On Mon, 2013-07-01 at 08:50 +0200, Hannes Reinecke wrote:
This patchs adds an 'eh_deadline' sysfs attribute to the scsi
host which limits the overall runtime of the SCSI EH.
The 'eh_deadline' value is stored in the now obsolete field
'resetting'.
When a command is failed the start time of the
This patchs adds an 'eh_deadline' sysfs attribute to the scsi
host which limits the overall runtime of the SCSI EH.
The 'eh_deadline' value is stored in the now obsolete field
'resetting'.
When a command is failed the start time of the EH is stored
in 'last_reset'. If the overall runtime of the
On 06/28/2013 09:29 AM, Bart Van Assche wrote:
On 06/10/13 13:11, Hannes Reinecke wrote:
+static int sdev_eh_deadline(struct Scsi_Host *shost,
+ unsigned long eh_start)
+{
+if (!shost-eh_deadline)
+return 0;
+
+if (shost-last_reset != 0
+
On Fri, 2013-06-28 at 09:14 +0200, Hannes Reinecke wrote:
@@ -232,6 +272,9 @@ int scsi_eh_scmd_add(struct scsi_cmnd *scmd, int
eh_flag)
if (scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY))
goto out_unlock;
+ if (sdev-eh_deadline !shost-last_reset)
The eh_deadline changes allow for a significant improvement
in multipath failover time. It works very well in our testing.
I do have a few corrections, see below:
On Mon, 2013-06-10 at 13:11 +0200, Hannes Reinecke wrote:
This patchs adds an 'eh_deadline' attribute to the scsi
host which limits
This patchs adds an 'eh_deadline' attribute to the scsi
host which limits the overall runtime of the SCSI EH.
When a command is failed the start time of the EH is stored
in 'last_reset'. If the overall runtime of the SCSI EH is longer
than last_reset + eh_deadline, the EH is short-circuited and
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