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Re: [Xen-devel] Unstableness in grant table block drivers
| To: | Anthony Liguori <aliguori@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Unstableness in grant table block drivers |
| From: | Kip Macy <kip.macy@xxxxxxxxx> |
| Date: | Wed, 13 Apr 2005 19:55:08 -0700 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx, Steven Hand <Steven.Hand@xxxxxxxxxxxx> |
| Delivery-date: | Thu, 14 Apr 2005 02:55:03 +0000 |
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| Reply-to: | Kip Macy <kip.macy@xxxxxxxxx> |
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If I do
3 VMs x 40 iSCSI LUNs/VM x foreach (lun) dd if=/dev/zero of=/dev/xbd<n> bs=64k
iscsi ops will stop going across the wire in 2 - 3 minutes. Access to
the LUNs from DOM0 still works. I haven't had a chance to try a
smaller configuration. This is all scripted so it only takes a minute
to set up, but I'm busy trying to get FreeBSD to run (and not have
DOM0 lockup) on a recent -unstable.
-Kip
On 4/13/05, Anthony Liguori <aliguori@xxxxxxxxxx> wrote:
> Kip Macy wrote:
>
> >I think it is safe to say that the blkback/blkfront still have some
> >serious bugs to be fixed even in the absences of grant tables.
> >
> >
> How many is a lot of VBDs? I've done quite a bit of testing of the
> devices (with Xend and with VM-Tools) and I've found the block drivers
> to be very reliable. I've not gone much higher than 3 or 4 VBDs for
> each domain though.
>
> Regards,
> Anthony Liguoris
>
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