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From: Mike Waychison <mikew@google.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Frank Swiderski <fes@google.com>,
	Rusty Russell <rusty@rustcorp.com.au>,
	Rik van Riel <riel@redhat.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	virtualization@lists.linux-foundation.org,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	kvm@vger.kernel.org
Subject: Re: [PATCH] Add a page cache-backed balloon device driver.
Date: Tue, 30 Oct 2012 09:25:49 -0700	[thread overview]
Message-ID: <CAGTjWtAyoqDS9vAc1HShBLfsdfuBy4-Aev+_Rn-f0H2V2C1PTg@mail.gmail.com> (raw)
In-Reply-To: <20121030152925.GA7023@redhat.com>

On Tue, Oct 30, 2012 at 8:29 AM, Michael S. Tsirkin <mst@redhat.com> wrote:
> On Tue, Sep 11, 2012 at 12:10:18AM +0300, Michael S. Tsirkin wrote:
>> > On the plus side, having an exit taken here on each page turns out to
>> > be relatively cheap, as the vmexit from the page fault should be
>> > faster to process as it is fully handled within the host kernel.
>> >
>> > Perhaps some combination of both methods is required? I'm not sure :\
>>
>> Perhaps some benchmarking is in order :)
>> Can you try telling host, potentially MADV_WILL_NEED
>> in that case like qemu does, then run your proprietary test
>> and see if things work well enough?
>
> Ping. Had a chance to try that?

Not yet.  We've been focused on other things recently and probably
won't have a chance to return to this for a couple months at best.
Sorry :(

WARNING: multiple messages have this Message-ID (diff)
From: Mike Waychison <mikew@google.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Frank Swiderski <fes@google.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Rik van Riel <riel@redhat.com>,
	kvm@vger.kernel.org,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	virtualization@lists.linux-foundation.org
Subject: Re: [PATCH] Add a page cache-backed balloon device driver.
Date: Tue, 30 Oct 2012 09:25:49 -0700	[thread overview]
Message-ID: <CAGTjWtAyoqDS9vAc1HShBLfsdfuBy4-Aev+_Rn-f0H2V2C1PTg@mail.gmail.com> (raw)
In-Reply-To: <20121030152925.GA7023@redhat.com>

On Tue, Oct 30, 2012 at 8:29 AM, Michael S. Tsirkin <mst@redhat.com> wrote:
> On Tue, Sep 11, 2012 at 12:10:18AM +0300, Michael S. Tsirkin wrote:
>> > On the plus side, having an exit taken here on each page turns out to
>> > be relatively cheap, as the vmexit from the page fault should be
>> > faster to process as it is fully handled within the host kernel.
>> >
>> > Perhaps some combination of both methods is required? I'm not sure :\
>>
>> Perhaps some benchmarking is in order :)
>> Can you try telling host, potentially MADV_WILL_NEED
>> in that case like qemu does, then run your proprietary test
>> and see if things work well enough?
>
> Ping. Had a chance to try that?

Not yet.  We've been focused on other things recently and probably
won't have a chance to return to this for a couple months at best.
Sorry :(

  reply	other threads:[~2012-10-30 16:26 UTC|newest]

Thread overview: 60+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-26 20:32 [PATCH] Add a page cache-backed balloon device driver Frank Swiderski
2012-06-26 20:40 ` Rik van Riel
2012-06-26 20:40   ` Rik van Riel
2012-06-26 21:31   ` Frank Swiderski
2012-06-26 21:31     ` Frank Swiderski
2012-06-26 21:45     ` Rik van Riel
2012-06-26 21:45       ` Rik van Riel
2012-06-26 23:45       ` Frank Swiderski
2012-06-27  9:04         ` Michael S. Tsirkin
2012-06-27  9:04           ` Michael S. Tsirkin
2012-06-26 21:47     ` Michael S. Tsirkin
2012-06-26 21:47       ` Michael S. Tsirkin
2012-06-26 23:21       ` Frank Swiderski
2012-06-26 23:21         ` Frank Swiderski
2012-06-27  9:02         ` Michael S. Tsirkin
2012-06-27  9:02           ` Michael S. Tsirkin
2012-07-02  0:29         ` Rusty Russell
2012-07-02  0:29           ` Rusty Russell
2012-09-03  6:35           ` Paolo Bonzini
2012-09-03  6:35             ` Paolo Bonzini
2012-09-06  1:35             ` Rusty Russell
2012-09-06  1:35               ` Rusty Russell
2012-06-26 21:41 ` Michael S. Tsirkin
2012-06-26 21:41   ` Michael S. Tsirkin
2012-06-27  2:56   ` Rusty Russell
2012-06-27  2:56     ` Rusty Russell
2012-06-27 15:48     ` Frank Swiderski
2012-06-27 15:48       ` Frank Swiderski
2012-06-27 16:06       ` Michael S. Tsirkin
2012-06-27 16:06         ` Michael S. Tsirkin
2012-06-27 16:08         ` Frank Swiderski
2012-06-27 16:08           ` Frank Swiderski
2012-06-27  9:40 ` Amit Shah
2012-06-27  9:40   ` Amit Shah
2012-08-30  8:57 ` Michael S. Tsirkin
2012-08-30  8:57   ` Michael S. Tsirkin
2012-09-03 15:09 ` Avi Kivity
2012-09-03 15:09   ` Avi Kivity
2012-09-10  9:05 ` Michael S. Tsirkin
2012-09-10  9:05   ` Michael S. Tsirkin
2012-09-10 17:37   ` Mike Waychison
2012-09-10 17:37     ` Mike Waychison
2012-09-10 18:04     ` Rik van Riel
2012-09-10 18:04       ` Rik van Riel
2012-09-10 18:29       ` Mike Waychison
2012-09-10 18:29         ` Mike Waychison
2012-09-10 19:59     ` Michael S. Tsirkin
2012-09-10 19:59       ` Michael S. Tsirkin
2012-09-10 19:59       ` Michael S. Tsirkin
2012-09-10 20:49       ` Mike Waychison
2012-09-10 20:49         ` Mike Waychison
2012-09-10 21:10         ` Michael S. Tsirkin
2012-09-10 21:10           ` Michael S. Tsirkin
2012-10-30 15:29           ` Michael S. Tsirkin
2012-10-30 15:29             ` Michael S. Tsirkin
2012-10-30 16:25             ` Mike Waychison [this message]
2012-10-30 16:25               ` Mike Waychison
2012-09-12  5:25         ` Rusty Russell
2012-09-12  5:25           ` Rusty Russell
2012-06-26 20:32 Frank Swiderski

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