Re: status of reducing context switching overhead in KVM

2014-06-21 Thread Rik van Riel
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

On 06/21/2014 04:55 AM, Xuekun Hu wrote:
> Hi, Rik
> 
> I saw your presentation at last year 2013 kvm submit. 
> (http://www.linux-kvm.org/wiki/images/2/27/Kvm-forum-2013-idle-latency.pdf).
>
> 
You said there will have some patches later, but I didn't find them.
> Are you continuing to do the optimization work? Any updates? :-)

I have gotten side-tracked by the automatic NUMA balancing work,
but Michael Tsirkin has been doing some work on reducing idle
latencies.

- -- 
All rights reversed
-BEGIN PGP SIGNATURE-
Version: GnuPG v1
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/

iQEcBAEBAgAGBQJTpYFnAAoJEM553pKExN6DcDcH/1UlBofa3KmGaercqfBk19Sj
78T8JgiAog4WBanFn3znVqbvdu1icMztVdUw/CoqVwgyeRmgyfXt5uf1lHtCe7zx
HS/BDIAYJSXt0uXPd7bBUThFdTLusL/VSf7WBV6ex3Qcw8qywBooS2VdA4wYP8t4
oMclOSR6imjhwSPYLP+723duzYowu35wXC1Fojhrm1AidAbLSIiClVGrDtkFjp5p
iuM+J6hHDPH3E/hwSWYE8EBeOC5CrvhmMdguv+7R4Z5qI9Qz+K6Ol8U1P33BcDfL
IXMoW/76UUEwmK3BOjTvYFUYJTUb94znY/e3q3zK1UZCoIpMqUyUjLUNiEZKjXc=
=rmno
-END PGP SIGNATURE-
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html


Re: [Qemu-devel] Why I advise against using ivshmem

2014-06-21 Thread Stefan Hajnoczi
On Wed, Jun 18, 2014 at 10:57 PM, David Marchand
 wrote:
> On 06/18/2014 12:48 PM, Stefan Hajnoczi wrote:
>>
>> One more thing to add to the list:
>>
>> static void ivshmem_read(void *opaque, const uint8_t * buf, int flags)
>>
>> The "flags" argument should be "size".  Size should be checked before
>> accessing buf.
>
>
> You are welcome to send a fix and I will review it.

I don't plan to send ivshmem patches in the near future because I
don't use or support it.

I thought you were interested in bringing ivshmem up to a level where
distros feel comfortable enabling and supporting it.  Getting there
will require effort from you to audit, clean up, and achieve test
coverage.  That's what a maintainer needs to do in a case like this.

Stefan
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html


status of reducing context switching overhead in KVM

2014-06-21 Thread Xuekun Hu
Hi, Rik

I saw your presentation at last year 2013 kvm submit.
(http://www.linux-kvm.org/wiki/images/2/27/Kvm-forum-2013-idle-latency.pdf).
You said there will have some patches later, but I didn't find them.
Are you continuing to do the optimization work? Any updates? :-)
Many thanks.

Thx, Xuekun
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html