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Re: [Xen-users] GPLPV and LUN's on a storage

To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-users] GPLPV and LUN's on a storage
From: Klaus Steinberger <klaus.steinberger@xxxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 27 Oct 2009 10:38:15 +0100
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Pasi Kärkkäinen schrieb:
On Tue, Oct 27, 2009 at 07:35:22AM +0100, Klaus Steinberger wrote:
Do you use phy:, file: or tap:aio: ?
phy:


Ok. Hmm.. that should be safe.

The pygrub problem is most probably different issue, since with pygrub
you have two different programs accessing the same storage: domU with
for example phy: driver, and then the dom0 userspace pygrub using normal
non-direct calls, which causes the problem.

Redhat fixed pygrub by making pygrub use O_DIRECT to bypass dom0 kernel
caches.

What's your dom0 OS/kernel/Xen? RHEL5.4?

Scientific Linux 5.3  (same as RHEL 5.3) kernel-2.6.18-128.7.1

Sincerly,
Klaus

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