From: Christophe Varoqui <christophe.varoqui@free.fr>
To: jens.axboe@oracle.com, james.bottomley@hansenpartnership.com,
alasdair.kergon@redhat.com
Cc: linux-scsi@vger.kernel.org, dm-devel@redhat.com
Subject: [BUG] dm-mpath and scsi persistent reservation
Date: Tue, 21 Oct 2008 23:19:10 +0200 [thread overview]
Message-ID: <20081021231910.0fdbeb75@plop> (raw)
Hi,
the dm-mpath multipathing driver enqueues write ios returned by
the scsi layer with a "reservation conflict" error (on assymetric
storage controllers, like Clariion, where queue_if_no_path is enabled).
This is wrong, and a potent data-corrupter : wio sent to a reserved
scsi device should never be retried on this same device.
Can someone advise on a viable solution for this problem ? I
understand the Device Mapper being a block remapper, it is not expected
to receive scsi errors directly ... but maybe some kind of translation
might be acceptable. Or is there hope in the request-based remapper ?
Jens, James, Alasdair, ... as maintainers of the involved subsystems,
would you care to give some advise on the issue.
Regards,
cvaroqui
next reply other threads:[~2008-10-21 21:19 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-21 21:19 Christophe Varoqui [this message]
2008-10-21 22:48 ` [BUG] dm-mpath and scsi persistent reservation Chandra Seetharaman
2008-10-22 19:54 ` Christophe Varoqui
2008-10-22 20:30 ` [dm-devel] " James Bottomley
2008-10-23 2:53 ` Mike Christie
2008-10-22 21:21 ` Chandra Seetharaman
2008-10-23 19:30 ` Christophe Varoqui
2008-10-23 21:03 ` Christophe Varoqui
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