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From: Eric Blake <eblake@redhat.com>
To: Kevin Wolf <kwolf@redhat.com>, qemu-block@nongnu.org
Cc: jsnow@redhat.com, qemu-devel@nongnu.org, mreitz@redhat.com
Subject: Re: [PATCH v2 0/2] mirror: Fix hang (operation waiting for itself/circular dependency)
Date: Thu, 26 Mar 2020 10:53:20 -0500
Message-ID: <3c799e1c-2a59-eac9-4f13-30d3415b24c7@redhat.com> (raw)
In-Reply-To: <20200326153628.4869-1-kwolf@redhat.com>

On 3/26/20 10:36 AM, Kevin Wolf wrote:
> The recent fix didn't actually fix the whole problem. Operations can't
> only wait for themselves, but we can also end up with circular
> dependencies like two operations waiting for each other to complete.
> This reverts the first fix and implements another approach.
> v2:
> - Mark active mirror operations as in-flight, too
> Kevin Wolf (2):
>    Revert "mirror: Don't let an operation wait for itself"
>    mirror: Wait only for in-flight operations

Reviewed-by: Eric Blake <eblake@redhat.com>

Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org

      parent reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-26 15:36 Kevin Wolf
2020-03-26 15:36 ` [PATCH v2 1/2] Revert "mirror: Don't let an operation wait for itself" Kevin Wolf
2020-03-26 15:36 ` [PATCH v2 2/2] mirror: Wait only for in-flight operations Kevin Wolf
2020-03-26 18:27   ` Max Reitz
2020-03-26 15:53 ` Eric Blake [this message]

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