From: Gleb Natapov <gleb@redhat.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: kvm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 03/11] Handle asynchronous page fault in a PV guest.
Date: Tue, 3 Nov 2009 16:25:33 +0200 [thread overview]
Message-ID: <20091103142533.GN27911@redhat.com> (raw)
In-Reply-To: <20091103141423.GC10084@amt.cnet>
On Tue, Nov 03, 2009 at 12:14:23PM -0200, Marcelo Tosatti wrote:
> On Sun, Nov 01, 2009 at 01:56:22PM +0200, Gleb Natapov wrote:
> > Asynchronous page fault notifies vcpu that page it is trying to access
> > is swapped out by a host. In response guest puts a task that caused the
> > fault to sleep until page is swapped in again. When missing page is
> > brought back into the memory guest is notified and task resumes execution.
>
> Can't you apply this to non-paravirt guests, and continue to deliver
> interrupts while waiting for the swapin?
>
> It should allow the guest to schedule a different task.
But how can I make the guest to not run the task that caused the fault?
--
Gleb.
WARNING: multiple messages have this Message-ID (diff)
From: Gleb Natapov <gleb@redhat.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: kvm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 03/11] Handle asynchronous page fault in a PV guest.
Date: Tue, 3 Nov 2009 16:25:33 +0200 [thread overview]
Message-ID: <20091103142533.GN27911@redhat.com> (raw)
In-Reply-To: <20091103141423.GC10084@amt.cnet>
On Tue, Nov 03, 2009 at 12:14:23PM -0200, Marcelo Tosatti wrote:
> On Sun, Nov 01, 2009 at 01:56:22PM +0200, Gleb Natapov wrote:
> > Asynchronous page fault notifies vcpu that page it is trying to access
> > is swapped out by a host. In response guest puts a task that caused the
> > fault to sleep until page is swapped in again. When missing page is
> > brought back into the memory guest is notified and task resumes execution.
>
> Can't you apply this to non-paravirt guests, and continue to deliver
> interrupts while waiting for the swapin?
>
> It should allow the guest to schedule a different task.
But how can I make the guest to not run the task that caused the fault?
--
Gleb.
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next prev parent reply other threads:[~2009-11-03 14:25 UTC|newest]
Thread overview: 112+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-01 11:56 [PATCH 00/11] KVM: Add asynchronous page fault for PV guest Gleb Natapov
2009-11-01 11:56 ` Gleb Natapov
2009-11-01 11:56 ` [PATCH 01/11] Add shared memory hypercall to PV Linux guest Gleb Natapov
2009-11-01 11:56 ` Gleb Natapov
2009-11-02 4:27 ` Rik van Riel
2009-11-02 4:27 ` Rik van Riel
2009-11-02 7:07 ` Gleb Natapov
2009-11-02 7:07 ` Gleb Natapov
2009-11-02 12:18 ` Avi Kivity
2009-11-02 12:18 ` Avi Kivity
2009-11-02 16:18 ` Gleb Natapov
2009-11-02 16:18 ` Gleb Natapov
2009-11-03 5:15 ` Avi Kivity
2009-11-03 5:15 ` Avi Kivity
2009-11-03 7:16 ` Gleb Natapov
2009-11-03 7:16 ` Gleb Natapov
2009-11-03 7:40 ` Avi Kivity
2009-11-03 7:40 ` Avi Kivity
2009-11-01 11:56 ` [PATCH 02/11] Add "handle page fault" PV helper Gleb Natapov
2009-11-01 11:56 ` Gleb Natapov
2009-11-02 9:22 ` Ingo Molnar
2009-11-02 9:22 ` Ingo Molnar
2009-11-02 16:04 ` Gleb Natapov
2009-11-02 16:04 ` Gleb Natapov
2009-11-02 16:12 ` Ingo Molnar
2009-11-02 16:12 ` Ingo Molnar
2009-11-02 16:22 ` Gleb Natapov
2009-11-02 16:22 ` Gleb Natapov
2009-11-02 16:29 ` Ingo Molnar
2009-11-02 16:29 ` Ingo Molnar
2009-11-02 16:31 ` Gleb Natapov
2009-11-02 16:31 ` Gleb Natapov
2009-11-02 17:42 ` Gleb Natapov
2009-11-02 17:42 ` Gleb Natapov
2009-11-08 11:36 ` Ingo Molnar
2009-11-08 11:36 ` Ingo Molnar
2009-11-08 12:43 ` Avi Kivity
2009-11-08 12:43 ` Avi Kivity
2009-11-08 12:51 ` Ingo Molnar
2009-11-08 12:51 ` Ingo Molnar
2009-11-08 13:01 ` Avi Kivity
2009-11-08 13:01 ` Avi Kivity
2009-11-08 13:05 ` Ingo Molnar
2009-11-08 13:05 ` Ingo Molnar
2009-11-08 13:08 ` Avi Kivity
2009-11-08 13:08 ` Avi Kivity
2009-11-08 16:44 ` H. Peter Anvin
2009-11-08 16:44 ` H. Peter Anvin
2009-11-08 16:47 ` Ingo Molnar
2009-11-08 16:47 ` Ingo Molnar
2009-11-02 19:03 ` Rik van Riel
2009-11-02 19:03 ` Rik van Riel
2009-11-02 19:33 ` Avi Kivity
2009-11-02 19:33 ` Avi Kivity
2009-11-02 23:35 ` Rik van Riel
2009-11-02 23:35 ` Rik van Riel
2009-11-03 4:57 ` Avi Kivity
2009-11-03 4:57 ` Avi Kivity
2009-11-03 4:57 ` Avi Kivity
2009-11-05 6:44 ` Tian, Kevin
2009-11-05 6:44 ` Tian, Kevin
2009-11-05 8:22 ` Avi Kivity
2009-11-05 8:22 ` Avi Kivity
2009-11-05 8:22 ` Avi Kivity
2009-11-01 11:56 ` [PATCH 03/11] Handle asynchronous page fault in a PV guest Gleb Natapov
2009-11-01 11:56 ` Gleb Natapov
2009-11-02 12:38 ` Avi Kivity
2009-11-02 12:38 ` Avi Kivity
2009-11-02 15:54 ` Gleb Natapov
2009-11-02 15:54 ` Gleb Natapov
2009-11-03 14:14 ` Marcelo Tosatti
2009-11-03 14:14 ` Marcelo Tosatti
2009-11-03 14:25 ` Gleb Natapov [this message]
2009-11-03 14:25 ` Gleb Natapov
2009-11-03 14:32 ` Marcelo Tosatti
2009-11-03 14:32 ` Marcelo Tosatti
2009-11-03 14:38 ` Avi Kivity
2009-11-03 14:38 ` Avi Kivity
2009-11-01 11:56 ` [PATCH 04/11] Export __get_user_pages_fast Gleb Natapov
2009-11-01 11:56 ` Gleb Natapov
2009-11-02 9:23 ` Ingo Molnar
2009-11-02 9:23 ` Ingo Molnar
2009-11-01 11:56 ` [PATCH 05/11] Add get_user_pages() variant that fails if major fault is required Gleb Natapov
2009-11-01 11:56 ` Gleb Natapov
2009-11-02 19:05 ` Rik van Riel
2009-11-02 19:05 ` Rik van Riel
2009-11-01 11:56 ` [PATCH 06/11] Inject asynchronous page fault into a guest if page is swapped out Gleb Natapov
2009-11-01 11:56 ` Gleb Natapov
2009-11-02 12:56 ` Avi Kivity
2009-11-02 12:56 ` Avi Kivity
2009-11-02 15:41 ` Gleb Natapov
2009-11-02 15:41 ` Gleb Natapov
2009-11-01 11:56 ` [PATCH 07/11] Retry fault before vmentry Gleb Natapov
2009-11-01 11:56 ` Gleb Natapov
2009-11-02 13:03 ` Avi Kivity
2009-11-02 13:03 ` Avi Kivity
2009-11-01 11:56 ` [PATCH 08/11] Add "wait for page" hypercall Gleb Natapov
2009-11-01 11:56 ` Gleb Natapov
2009-11-02 13:05 ` Avi Kivity
2009-11-02 13:05 ` Avi Kivity
2009-11-02 15:13 ` Gleb Natapov
2009-11-02 15:13 ` Gleb Natapov
2009-11-02 15:19 ` Avi Kivity
2009-11-02 15:19 ` Avi Kivity
2009-11-01 11:56 ` [PATCH 09/11] Maintain preemptability count even for !CONFIG_PREEMPT kernels Gleb Natapov
2009-11-01 11:56 ` Gleb Natapov
2009-11-02 9:24 ` Ingo Molnar
2009-11-02 9:24 ` Ingo Molnar
2009-11-01 11:56 ` [PATCH 10/11] Handle async PF in non preemptable context Gleb Natapov
2009-11-01 11:56 ` Gleb Natapov
2009-11-01 11:56 ` [PATCH 11/11] Send async PF when guest is not in userspace too Gleb Natapov
2009-11-01 11:56 ` Gleb Natapov
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