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From: Rusty Russell <rusty@rustcorp.com.au>
To: Avi Kivity <avi@redhat.com>
Cc: Pierre Ossman <drzeus-list@drzeus.cx>,
	Minchan Kim <minchan.kim@gmail.com>,
	kvm@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
	linux-mm@kvack.org, Wu Fengguang <fengguang.wu@intel.com>,
	KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	Rik van Riel <riel@redhat.com>
Subject: Re: Page allocation failures in guest
Date: Wed, 12 Aug 2009 12:49:51 +0930	[thread overview]
Message-ID: <200908121249.51973.rusty@rustcorp.com.au> (raw)
In-Reply-To: <4A811545.5090209@redhat.com>

On Tue, 11 Aug 2009 04:22:53 pm Avi Kivity wrote:
> On 08/11/2009 09:32 AM, Pierre Ossman wrote:
> > On Mon, 13 Jul 2009 23:59:52 +0900
> > Minchan Kim<minchan.kim@gmail.com>  wrote:
> > Any ideas here? Is the virtio net driver very GFP_ATOMIC happy so it
> > drains all those pages? And why is this triggered by a kernel upgrade
> > in the host?
> >
> > Avi? 
> 
> Rusty?

It's kind of the nature of networking devices :(

I'd say your host now offers GSO features, so the guest allocates big
packets.

> > I doesn't get out of it though, or at least the virtio net driver
> > wedges itself.

There's a fixme to retry when this happens, but this is the first report
I've received.  I'll check it out.

Thanks,
Rusty.

WARNING: multiple messages have this Message-ID (diff)
From: Rusty Russell <rusty@rustcorp.com.au>
To: Avi Kivity <avi@redhat.com>
Cc: Pierre Ossman <drzeus-list@drzeus.cx>,
	Minchan Kim <minchan.kim@gmail.com>,
	kvm@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
	linux-mm@kvack.org, Wu Fengguang <fengguang.wu@intel.com>,
	KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	Rik van Riel <riel@redhat.com>
Subject: Re: Page allocation failures in guest
Date: Wed, 12 Aug 2009 12:49:51 +0930	[thread overview]
Message-ID: <200908121249.51973.rusty@rustcorp.com.au> (raw)
In-Reply-To: <4A811545.5090209@redhat.com>

On Tue, 11 Aug 2009 04:22:53 pm Avi Kivity wrote:
> On 08/11/2009 09:32 AM, Pierre Ossman wrote:
> > On Mon, 13 Jul 2009 23:59:52 +0900
> > Minchan Kim<minchan.kim@gmail.com>  wrote:
> > Any ideas here? Is the virtio net driver very GFP_ATOMIC happy so it
> > drains all those pages? And why is this triggered by a kernel upgrade
> > in the host?
> >
> > Avi? 
> 
> Rusty?

It's kind of the nature of networking devices :(

I'd say your host now offers GSO features, so the guest allocates big
packets.

> > I doesn't get out of it though, or at least the virtio net driver
> > wedges itself.

There's a fixme to retry when this happens, but this is the first report
I've received.  I'll check it out.

Thanks,
Rusty.

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  reply	other threads:[~2009-08-12  3:19 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-07-13  9:51 Page allocation failures in guest Pierre Ossman
2009-07-13 14:59 ` Minchan Kim
2009-07-13 14:59   ` Minchan Kim
2009-08-11  6:32   ` Pierre Ossman
2009-08-11  6:52     ` Avi Kivity
2009-08-11  6:52       ` Avi Kivity
2009-08-12  3:19       ` Rusty Russell [this message]
2009-08-12  3:19         ` Rusty Russell
2009-08-12  5:31         ` Rusty Russell
2009-08-12  5:31           ` Rusty Russell
2009-08-12  5:41           ` Avi Kivity
2009-08-12  5:41             ` Avi Kivity
2009-08-12  6:56             ` Rusty Russell
2009-08-12  6:56               ` Rusty Russell
2009-08-13 20:25           ` Pierre Ossman
2009-08-26  2:17             ` Rusty Russell
2009-08-26  2:17               ` Rusty Russell
2009-08-26  4:55               ` Pierre Ossman
2009-08-26 12:18                 ` Rusty Russell
2009-08-26 12:18                   ` Rusty Russell
2009-08-26 19:22                   ` David Miller
2009-08-26 19:22                     ` David Miller
2009-08-12  6:19         ` Pierre Ossman
2009-08-12  7:43           ` Avi Kivity
2009-08-12  7:43             ` Avi Kivity
2009-08-12  8:22             ` Pierre Ossman
2009-08-12  8:35               ` Avi Kivity
2009-08-12  8:35                 ` Avi Kivity

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