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[Xen-devel] [PATCH 1 of 1] xen-backwatch: Deal with broken frontend/back
| To: | Xen <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH 1 of 1] xen-backwatch: Deal with broken frontend/backend ring I/O |
| From: | Daniel Stodden <daniel.stodden@xxxxxxxxxx> |
| Date: | Mon, 20 Jun 2011 01:26:30 -0700 |
| Delivery-date: | Mon, 20 Jun 2011 01:29:18 -0700 |
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| In-reply-to: | <patchbomb.1308558389@xxxxxxxxxxxxxxxxxxxxxxx> |
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Adds tool support to debug backends which expose I/O ring state in sysfs. Currently supports /sys/devices/xen-backend/vbd-*-*/io_ring nodes for block I/O, where implemented. Primary function is to observe ring state make progress over a period of time, then report stuck message queue halves where pending consumer/event are not moving. Adding --kick will re-issue event notifications to frontends, and/or kick backends out of wait state. Signed-off-by: Daniel Stodden <daniel.stodden@xxxxxxxxxx>
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