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Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging
From: |
Paolo Bonzini |
Subject: |
Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu |
Date: |
Wed, 13 May 2020 13:58:23 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 |
On 13/05/20 13:26, Daniel P. Berrangé wrote:
> Are you referring to the in-kernel NFS client hangs here ? AFAIK, it is
> impossible to do anything to get out of those hangs from userspace, because
> the thread is stuck in an uninterruptable sleep in kernel space.
>
> If using the in-QEMU NFS client, then there is a network connection that
> can be yanked just like the NBD client.
But it's a bad idea to yank it (and also the NBD client) because you're
not sure which wites have made it to the server (and to the medium) and
which haven't.
Effectively, the in-QEMU NFS client and NBD client are always operating
in "soft" mode, but we should always treat that as a bug (which cannot
be fixed) and not a feature for read-write images.
Paolo
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, (continued)
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Dr. David Alan Gilbert, 2020/05/11
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Lukas Straub, 2020/05/12
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Daniel P . Berrangé, 2020/05/12
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Dr. David Alan Gilbert, 2020/05/12
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Daniel P . Berrangé, 2020/05/13
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Lukas Straub, 2020/05/12
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Kevin Wolf, 2020/05/13
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Dr. David Alan Gilbert, 2020/05/13
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Kevin Wolf, 2020/05/13
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Daniel P . Berrangé, 2020/05/13
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu,
Paolo Bonzini <=
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Dr. David Alan Gilbert, 2020/05/13
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Kevin Wolf, 2020/05/13
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Kevin Wolf, 2020/05/13
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Dr. David Alan Gilbert, 2020/05/13
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Daniel P . Berrangé, 2020/05/13
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Dr. David Alan Gilbert, 2020/05/13
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Eric Blake, 2020/05/13
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Kevin Wolf, 2020/05/13
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Eric Blake, 2020/05/13
- Re: [PATCH 0/5] Introduce 'yank' oob qmp command to recover from hanging qemu, Lukas Straub, 2020/05/11