From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dor Laor Subject: Re: kvm with usb slow Date: Mon, 07 Jan 2008 00:03:27 +0200 Message-ID: <4781502F.9010304@qumranet.com> References: <20080106164153.GO4981@gamma.logic.tuwien.ac.at> Reply-To: dor.laor-atKUWr5tajBWk0Htik3J/w@public.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0173319382==" Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, Arnon Gilboa To: Norbert Preining Return-path: In-Reply-To: <20080106164153.GO4981-DqSSrKF0TaySnEC3TeqHn5dqbFPxfnh/@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org This is a multi-part message in MIME format. --===============0173319382== Content-Type: multipart/alternative; boundary="------------080707040501040607080800" This is a multi-part message in MIME format. --------------080707040501040607080800 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Norbert Preining wrote: > > Hi all, > > (please Cc, thanks) > > I am running kernel 2.6.24-rc6 and kvm-56 (or was it 55) and as soon as > I plug an usb device with usb enabled it is getting terrible slow. I > have searched a bit and it seems to be related to async i/o not being > implemented. > Can you please tell the device type, is it usb2.0 or usb1.1 ? Is running with -no-kvm improve something? > > Is this expected behaviour, and if yes, are there patches floating around > for testing? > Arnon will send updated patches soon. > > Best wishes > > Norbert > > ------------------------------------------------------------------------------- > Dr. Norbert Preining Vienna University of > Technology > Debian Developer Debian > TeX Group > gpg DSA: 0x09C5B094 fp: 14DF 2E6C 0307 BE6D AD76 A9C0 D2BF 4AA3 > 09C5 B094 > ------------------------------------------------------------------------------- > HASTINGS (pl.n.) > Things said on the spur of the moment to explain to someone who comes > into a room unexpectedly precisely what it is you are doing. > --- Douglas Adams, The Meaning of Liff > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2005. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > kvm-devel mailing list > kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org > https://lists.sourceforge.net/lists/listinfo/kvm-devel > --------------080707040501040607080800 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Norbert Preining wrote:
[kvm-devel] kvm with usb slow

Hi all,

(please Cc, thanks)

I am running kernel 2.6.24-rc6 and kvm-56 (or was it 55) and as soon as
I plug an usb device with usb enabled it is getting terrible slow. I
have searched a bit and it seems to be related to async i/o not being
implemented.

Can you please tell the device type, is it usb2.0 or usb1.1 ?
Is running with -no-kvm improve something?

Is this expected behaviour, and if yes, are there patches floating around
for testing?

Arnon will send updated patches soon.

Best wishes

Norbert

-------------------------------------------------------------------------------
Dr. Norbert Preining <preining-DX+603jRYB8@public.gmane.org>        Vienna University of Technology
Debian Developer <preining-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>                         Debian TeX Group
gpg DSA: 0x09C5B094      fp: 14DF 2E6C 0307 BE6D AD76  A9C0 D2BF 4AA3 09C5 B094
-------------------------------------------------------------------------------
HASTINGS (pl.n.)
Things said on the spur of the moment to explain to someone who comes
into a room unexpectedly precisely what it is you are doing.
                        --- Douglas Adams, The Meaning of Liff

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2005.
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