From: Mike Christie <mchristi@redhat.com>
To: Christophe Varoqui <christophe.varoqui@opensvc.com>
Cc: device-mapper development <dm-devel@redhat.com>
Subject: Re: [PATCH 0/4] multipath-tools: Ceph rbd support
Date: Fri, 8 Jul 2016 10:46:19 -0500 [thread overview]
Message-ID: <ac72c03f-1428-ed9a-ffdc-9586f2a155fa@redhat.com> (raw)
In-Reply-To: <CABr-Gnc34cJ9oRB4J=0Rv1jgZ_Cr=uvMHwHAy_49XHGuBy33XQ@mail.gmail.com>
On 07/08/2016 03:15 AM, Christophe Varoqui wrote:
> Hi Mike,
>
> this patchset was broken by the resync with hannes rcu v2 branch.
> Can you rebase it in the light of the changes to the conf pointer access
> applied in dbd9ad6f0e555707335ec71e1c5bec1723e02f79 ?
>
Yeah, no problem.
> Thanks.
>
> On Tue, Jul 5, 2016 at 10:12 AM, Mike Christie <mchristi@redhat.com
> <mailto:mchristi@redhat.com>> wrote:
>
> The following patches add Ceph rbd support for handling
> blacklisted devices. This does not support features like
> multibus.
>
> My specific use is for exporting rbd images through multiple
> LIO instances. In this case, we have one rbd instance that
> has the exclusive lock and send WRITE requests. If that host
> becomes unreachable, then another host will grab the lock,
> and blacklist the original host to prevent it from sending stale
> IO (when blacklisted IO will be failed by the OSD).
>
> To recover from this, this patchset adds a repair() callout
> to the checker. If the path is in the PATH_DOWN state this
> callout can be used to fix it up. For my case, I am remapping
> the device to flush stale IO and cleanup the old lock,
> and then unblacklisting myself.
>
>
>
>
>
> --
> dm-devel mailing list
> dm-devel@redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
>
prev parent reply other threads:[~2016-07-08 15:46 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-05 8:12 [PATCH 0/4] multipath-tools: Ceph rbd support Mike Christie
2016-07-05 8:12 ` [PATCH 1/4] multipath-tools: add rbd discovery detection Mike Christie
2016-07-05 8:12 ` [PATCH 2/4] multipath-tools: add checker callout to repair path Mike Christie
2016-07-05 8:12 ` [PATCH 3/4] multipath-tools: Add rbd checker Mike Christie
2016-07-05 8:12 ` [PATCH 4/4] multipath-tools: Add rbd to the hwtable Mike Christie
2016-07-08 8:15 ` [PATCH 0/4] multipath-tools: Ceph rbd support Christophe Varoqui
2016-07-08 15:46 ` Mike Christie [this message]
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