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

[Klaus Steinberger <klaus.steinberger@xxxxxxxxxxxxxxxxxxxxxx>]

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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