From: Luiz Capitulino <lcapitulino@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: kwolf@redhat.com, aliguori@us.ibm.com, qemu-devel@nongnu.org,
armbru@redhat.com
Subject: Re: [Qemu-devel] [PATCH v2 0/5]: QMP: Proper thin provisioning support
Date: Wed, 3 Aug 2011 15:11:38 -0300 [thread overview]
Message-ID: <20110803151138.28850d1c@doriath> (raw)
In-Reply-To: <20110803163131.GA8411@lst.de>
On Wed, 3 Aug 2011 18:31:31 +0200
Christoph Hellwig <hch@lst.de> wrote:
> > It's already possible for QMP clients to implement this feature by using
> > the BLOCK_IO_ERROR event. However, the event can be missed. When this
> > happens QMP clients need a way to query if any block device has hit a
> > no space condition.
>
> We have a mode where we stop the VM when it hits ENOSPC, and that is
> the only reliably way to handle it.
This series just complements that mode by allowing a mngt application
to query which device triggered the ENOSPC. Well, that's my intention :)
> One that ENOSPC gets returned
> to the guest we don't know that it was an ENOSPC, and the guest will
> usually simply shut the filesystem down. This could be worked around
> by implementing full T10 logical provisioning support, but very few
> guests actually support it properly. And it won't work with ide disks
> at all, and for virtio we'd have to implement it first.
Seems interesting, but the current solution is guest independent.
next prev parent reply other threads:[~2011-08-03 18:11 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-03 15:19 [Qemu-devel] [PATCH v2 0/5]: QMP: Proper thin provisioning support Luiz Capitulino
2011-08-03 15:19 ` [Qemu-devel] [PATCH 1/5] block: Introduce get_iostatus() device model operation Luiz Capitulino
2011-08-03 15:19 ` [Qemu-devel] [PATCH 2/5] QMP/HMP: Add the 'io-status' field to query-block and info block Luiz Capitulino
2011-08-03 15:19 ` [Qemu-devel] [PATCH 3/5] virtio-blk: Support I/O status Luiz Capitulino
2011-08-03 15:19 ` [Qemu-devel] [PATCH 4/5] ide: " Luiz Capitulino
2011-08-03 15:19 ` [Qemu-devel] [PATCH 5/5] scsi-disk: " Luiz Capitulino
2011-08-03 15:39 ` [Qemu-devel] [PATCH v2 0/5]: QMP: Proper thin provisioning support Kevin Wolf
2011-08-03 18:08 ` Luiz Capitulino
2011-08-04 8:10 ` Kevin Wolf
2011-08-04 9:19 ` Markus Armbruster
2011-08-04 13:42 ` Luiz Capitulino
2011-08-03 16:31 ` Christoph Hellwig
2011-08-03 18:11 ` Luiz Capitulino [this message]
2011-08-03 18:26 ` Christoph Hellwig
2011-08-03 18:36 ` Luiz Capitulino
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