[dm-devel] [PATCH] dm mpath: Skip calling activate_path if the path is already failed

[Hannes Reinecke]

Moger, Babu wrote:
> Alasdair, Can you please pick up this patch in your next update..
> 
> Hannes, Any comments from you? I know you have already reviewed this in another thread.
> 
> Thanks
> Babu Moger 
> 
>> -----Original Message-----
>> From: dm-devel-bounces at redhat.com [mailto:dm-devel-bounces at redhat.com] On
>> Behalf Of Moger, Babu
>> Sent: Wednesday, July 29, 2009 10:47 AM
>> To: dm-devel at redhat.com
>> Subject: [dm-devel] [PATCH] dm mpath: Skip calling activate_path if the
>> path is already failed
>>
>> This patch adds a check to skip failed paths while calling activate_path.
>> If the path is already failed then activate_path will fail for sure. We
>> don't have to call in that case.
>>
>> Signed-off-by: Babu Moger <babu.moger at lsi.com>
>> ---
>>
>>
>> --- linux-2.6.31-rc3/drivers/md/dm-mpath.c.orig	2009-07-27
>> 10:30:39.000000000 -0500
>> +++ linux-2.6.31-rc3/drivers/md/dm-mpath.c	2009-07-27
>> 10:35:50.000000000 -0500
>> @@ -454,6 +454,10 @@ static void process_queued_ios(struct wo
>>  		m->pg_init_count++;
>>  		m->pg_init_required = 0;
>>  		list_for_each_entry(tmp, &pgpath->pg->pgpaths, list) {
>> +			/* Skip failed paths */
>> +			if (!tmp->is_active)
>> +				continue;
>> +
>>  			if (queue_work(kmpath_handlerd, &tmp->activate_path))
>>  				m->pg_init_in_progress++;
>>  		}
>>
>>
>>
>> --
>> dm-devel mailing list
>> dm-devel at redhat.com
>> https://www.redhat.com/mailman/listinfo/dm-devel
Patch is fine. And, indeed, we really should be adding it.

Acked-by: Hannes Reinecke <hare at suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare at suse.de			      +49 911 74053 688
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