From: Rusty Russell <rusty@rustcorp.com.au>
To: Adam Litke <agl@us.ibm.com>
Cc: qemu-devel@nongnu.org, "Anthony Liguori" <aliguori@us.ibm.com>,
Avi Kivity <avi@redhat.com>,
virtualization@lists.linux-foundation.org,
linux-kernel@vger.kernel.org
Subject: Re: virtio: Add memory statistics reporting to the balloon driver
Date: Tue, 10 Nov 2009 13:12:02 +1030 [thread overview]
Message-ID: <200911101312.02650.rusty@rustcorp.com.au> (raw)
In-Reply-To: <1257784326.2835.16.camel@aglitke>
On Tue, 10 Nov 2009 03:02:06 am Adam Litke wrote:
> A simpler approach is to collect memory statistics in the virtio
> balloon driver and communicate them to the host via the device config space.
There are two issues I see with this. First, there's an atomicity problem
since you can't tell when the stats are consistent. Second, polling is
ugly.
A stats vq might solve this more cleanly?
Rusty.
WARNING: multiple messages have this Message-ID (diff)
From: Rusty Russell <rusty@rustcorp.com.au>
To: Adam Litke <agl@us.ibm.com>
Cc: linux-kernel@vger.kernel.org,
Anthony Liguori <aliguori@us.ibm.com>,
virtualization@lists.linux-foundation.org, qemu-devel@nongnu.org,
Avi Kivity <avi@redhat.com>
Subject: [Qemu-devel] Re: virtio: Add memory statistics reporting to the balloon driver
Date: Tue, 10 Nov 2009 13:12:02 +1030 [thread overview]
Message-ID: <200911101312.02650.rusty@rustcorp.com.au> (raw)
In-Reply-To: <1257784326.2835.16.camel@aglitke>
On Tue, 10 Nov 2009 03:02:06 am Adam Litke wrote:
> A simpler approach is to collect memory statistics in the virtio
> balloon driver and communicate them to the host via the device config space.
There are two issues I see with this. First, there's an atomicity problem
since you can't tell when the stats are consistent. Second, polling is
ugly.
A stats vq might solve this more cleanly?
Rusty.
next prev parent reply other threads:[~2009-11-10 2:42 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-09 16:07 [Qemu-devel] [RFC] virtio: Report new guest memory statistics pertinent to memory ballooning (V2) Adam Litke
2009-11-09 16:32 ` virtio: Add memory statistics reporting to the balloon driver Adam Litke
2009-11-09 16:32 ` [Qemu-devel] " Adam Litke
2009-11-10 2:42 ` Rusty Russell
2009-11-10 2:42 ` [Qemu-devel] " Rusty Russell
2009-11-10 2:42 ` Rusty Russell [this message]
2009-11-10 2:42 ` Rusty Russell
2009-11-10 14:36 ` Anthony Liguori
2009-11-10 14:36 ` Anthony Liguori
2009-11-10 14:36 ` Anthony Liguori
2009-11-10 14:43 ` Avi Kivity
2009-11-10 14:43 ` Avi Kivity
2009-11-10 14:58 ` Anthony Liguori
2009-11-10 14:58 ` Anthony Liguori
2009-11-10 14:58 ` Anthony Liguori
2009-11-11 9:24 ` Jamie Lokier
2009-11-11 9:24 ` Jamie Lokier
2009-11-11 10:12 ` Daniel P. Berrange
2009-11-11 10:12 ` Daniel P. Berrange
2009-11-11 13:26 ` Adam Litke
2009-11-11 13:26 ` Adam Litke
2009-11-11 13:26 ` Adam Litke
2009-11-11 15:00 ` Avi Kivity
2009-11-11 15:00 ` Avi Kivity
2009-11-11 15:00 ` Avi Kivity
2009-11-11 10:12 ` Daniel P. Berrange
2009-11-11 9:24 ` Jamie Lokier
2009-11-10 14:43 ` Avi Kivity
2009-11-10 23:59 ` Rusty Russell
2009-11-10 23:59 ` Rusty Russell
2009-11-10 23:59 ` Rusty Russell
2009-11-10 21:52 ` Anthony Liguori
2009-11-10 21:52 ` Anthony Liguori
2009-11-10 21:52 ` [Qemu-devel] " Anthony Liguori
2009-11-11 0:02 ` Rusty Russell
2009-11-11 0:02 ` Rusty Russell
2009-11-11 0:02 ` [Qemu-devel] " Rusty Russell
2009-11-11 0:07 ` Anthony Liguori
2009-11-11 0:07 ` [Qemu-devel] " Anthony Liguori
2009-11-11 2:43 ` Rusty Russell
2009-11-11 2:43 ` [Qemu-devel] " Rusty Russell
2009-11-11 15:08 ` Adam Litke
2009-11-11 15:08 ` Adam Litke
2009-11-11 15:08 ` [Qemu-devel] " Adam Litke
2009-11-12 2:29 ` Rusty Russell
2009-11-12 2:29 ` Rusty Russell
2009-11-12 2:29 ` [Qemu-devel] " Rusty Russell
2009-11-11 2:43 ` Rusty Russell
2009-11-11 0:07 ` Anthony Liguori
2009-11-10 2:42 ` [Qemu-devel] " Rusty Russell
2009-11-09 16:32 ` Adam Litke
2009-11-09 19:00 ` [Qemu-devel] [RFC] virtio: Report new guest memory statistics pertinent to memory ballooning (V2) Jamie Lokier
2009-11-09 19:16 ` Adam Litke
2009-11-09 21:15 ` Anthony Liguori
2009-11-10 13:23 ` Jamie Lokier
2009-11-09 19:01 ` Jamie Lokier
2009-11-09 19:23 ` Adam Litke
-- strict thread matches above, loose matches on Subject: below --
2009-11-05 22:50 [Qemu-devel] [RFC] virtio: Report new guest memory statistics pertinent to memory ballooning Adam Litke
2009-11-05 23:02 ` [Qemu-devel] virtio: Add memory statistics reporting to the balloon driver Adam Litke
2009-11-05 23:39 ` Anthony Liguori
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