From: Marcelo Tosatti <mtosatti@redhat.com>
To: Gerd von Egidy <lists@egidy.de>
Cc: kvm-devel@lists.sourceforge.net
Subject: Re: disappointing speed with virtio_blk
Date: Wed, 16 Apr 2008 20:40:55 -0300 [thread overview]
Message-ID: <20080416234055.GA4869@dmt> (raw)
In-Reply-To: <200804170105.50963.lists@egidy.de>
On Thu, Apr 17, 2008 at 01:05:50AM +0200, Gerd von Egidy wrote:
> Hi Marcelo,
>
> > virtio-blk is doing synchronous IO which blocks the guest CPU.
> >
> > This is especially bad for write intensive loads where the guest
> > will hang in the host write throttling logic.
> >
> > In the meantime please try the following patch:
> >
> > http://www.mail-archive.com/kvm-devel@lists.sourceforge.net/msg14732.html
>
> Thank you for this hint.
>
> I tried it this evening with kvm 66 - which should include your patch, right?
Hi Gerd,
No its not included. The issue is being worked on.
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next prev parent reply other threads:[~2008-04-16 23:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-13 21:04 disappointing speed with virtio_blk Gerd von Egidy
2008-04-13 21:22 ` Charles Duffy
2008-04-13 21:55 ` Gerd von Egidy
2008-04-14 0:29 ` Marcelo Tosatti
2008-04-16 23:05 ` Gerd von Egidy
2008-04-16 23:40 ` Marcelo Tosatti [this message]
2008-04-18 21:27 ` Gerd von Egidy
2008-04-18 21:49 ` Marcelo Tosatti
2008-04-18 22:32 ` Gerd von Egidy
2008-04-14 1:41 ` Anthony Liguori
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