linux-kernel - Re: [PATCH v3 00/12] KVM: Add host swap event notifications for PV guest

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <fdaac4d51001060217h16ffb331mcc0db195630f4de4@mail.gmail.com>
Date:	Wed, 6 Jan 2010 19:17:30 +0900
From:	Jun Koi <junkoi2004@...il.com>
To:	Avi Kivity <avi@...hat.com>
Cc:	Gleb Natapov <gleb@...hat.com>, kvm@...r.kernel.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org, mingo@...e.hu,
	a.p.zijlstra@...llo.nl, tglx@...utronix.de, hpa@...or.com,
	riel@...hat.com, cl@...ux-foundation.org
Subject: Re: [PATCH v3 00/12] KVM: Add host swap event notifications for PV 
	guest

On Wed, Jan 6, 2010 at 1:04 AM, Avi Kivity <avi@...hat.com> wrote:
> On 01/05/2010 05:05 PM, Jun Koi wrote:
>>
>> Is it true that to make this work, we will need a (PV) kernel driver
>> for each guest OS (Windows, Linux, ...)?
>>
>>
>
> It's partially usable even without guest modifications; while servicing a
> host page fault we can still deliver interrupts to the guest (which might
> cause a context switch and thus further progress to be made).

Lets say, in the case the guest has no PV driver. When we find that a
guest page is swapped out, we can send a pagefault
to the guest to trick it to load that page in. And we dont need the
driver at all.

Is that a reasonable solution?

Thanks,
J
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/