From: Hannes Reinecke <hare@suse.de>
To: Christoph Hellwig <hch@lst.de>,
Christophe Varoqui <christophe.varoqui@opensvc.com>
Cc: device-mapper development <dm-devel@redhat.com>,
Mike Snitzer <snitzer@redhat.com>,
linux-scsi@vger.kernel.org
Subject: Re: [dm-devel] [PATCH] dm-mpath: always return reservation conflict
Date: Thu, 16 Jul 2015 16:40:34 +0200 [thread overview]
Message-ID: <55A7C262.6060204@suse.de> (raw)
In-Reply-To: <20150716075450.GA23334@lst.de>
On 07/16/2015 09:54 AM, Christoph Hellwig wrote:
> On Thu, Jul 16, 2015 at 05:07:03AM +0000, Christophe Varoqui wrote:
>> For reference the opensvc crm does use type 5 pr, and aims for all paths
>> registered. It still does not make use of the multipathd pr janitoring
>> features, and uses sg_persist directly for pr status and actions.
>
> The type doesn't matter here. It's important to set the ALL_TG_PT bit
> when registering the key. As dm-mpath opens the underlying devices
> exclusively, and doesn't give you a choice which path to send to you're
> in a world of pain without that.
>
Second that.
I would even put this in the manpage somewhere.
Cheers,
Hannes
--
Dr. Hannes Reinecke zSeries & Storage
hare@suse.de +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
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next prev parent reply other threads:[~2015-07-16 14:40 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-15 11:23 [PATCH] dm-mpath: always return reservation conflict Hannes Reinecke
2015-07-15 11:35 ` James Bottomley
2015-07-15 11:52 ` Hannes Reinecke
2015-07-15 11:56 ` Christoph Hellwig
2015-07-15 12:02 ` Hannes Reinecke
2015-07-15 12:01 ` James Bottomley
2015-07-15 12:15 ` Hannes Reinecke
2015-07-15 13:20 ` Mike Snitzer
2015-07-16 5:07 ` [PATCH] " Christophe Varoqui
2015-07-16 7:54 ` [dm-devel] " Christoph Hellwig
2015-07-16 14:40 ` Hannes Reinecke [this message]
-- strict thread matches above, loose matches on Subject: below --
2016-08-02 12:36 [PING / RESEND] handling reservation conflicts in dm-mpath Christoph Hellwig
2016-08-02 12:36 ` [PATCH] dm-mpath: always return reservation conflict Christoph Hellwig
2016-08-11 18:38 ` [dm-devel] " Christoph Hellwig
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