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On Jun,Monday 6 2011, at 12:26 PM, Hugo Silva wrote:

> Hello,
> Some days ago I installed a new -current 5.99.52 Xen dom0 from one of
> the available nyftp images.
> Just noticed this in messages @ the dom0:
> /netbsd: xbdback backend/vbd/8/1: DIOCCACHESYNC returned -4
> /netbsd: xbdback backend/vbd/8/1: DIOCCACHESYNC returned -4
> last message repeated 10 times
> This rang a bell, and indeed:

Right now LVM just sends DIOCCACHESYNC to physical device behind


return VOP_IOCTL(tlc->pdev->pdev_vnode,  DIOCCACHESYNC, &cmd,
            FREAD|FWRITE, kauth_cred_get());

So to me it looks like this error comes from disk device itself.

> Since that post I've been running various NetBSD domUs in various
> versions of -current and this issue has not manifested, so I assume a
> recent change caused this?
> Or maybe I fscked up somewhere. Feedback welcome :)
> Hugo



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