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From: | Markus Armbruster |
Subject: | Re: [Qemu-devel] [PATCH v3 0/6]: block: Add I/O status support |
Date: | Tue, 27 Sep 2011 20:40:47 +0200 |
User-agent: | Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux) |
Luiz Capitulino <address@hidden> writes: > This series adds support to the block layer to keep track of devices' > I/O status. That information is also made available in QMP and HMP. > > The goal here is to allow management applications that miss the > BLOCK_IO_ERROR event to able to query the VM to determine if any device has > caused the VM to stop and which device caused it. > > Here's an HMP example: > > (qemu) info status > VM status: paused (io-error) > (qemu) info block > ide0-hd0: removable=0 io-status=ok file=disks/test2.img ro=0 drv=qcow2 > encrypted=0 > ide0-hd1: removable=0 io-status=nospace file=/dev/vg_doriath/kvmtest ro=0 > drv=qcow2 encrypted=0 > ide1-cd0: removable=1 locked=0 io-status=ok [not inserted] > floppy0: removable=1 locked=0 [not inserted] > sd0: removable=1 locked=0 [not inserted] > > The session above shows that the VM is stopped due to an I/O error. By using > the info block command it's possible to determine that the 'ide0-hd1' device > caused the error, which turns out to be due to no space. Reviewed-by: Markus Armbruster <address@hidden>
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