From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brian Hays Subject: Re: 1850/2850 hangs under I/O load Date: Wed, 13 Jul 2005 12:43:44 -0400 Message-ID: References: Reply-To: Brian Hays Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Keir Fraser Cc: xen-devel@lists.xensource.com, barryf-lists@flanagan.ie, davidh.davidh@gmail.com, rob@rsee.net List-Id: xen-devel@lists.xenproject.org Hi all, I'm also about to install Xen on a Poweredge 1850. Is this the recommended set up (patch referenced below) for that hardware? If so, is there any thing else that may take a hit as far as performance or reliablity after making the change suggested? Thank you, Brian On 7/13/05, Keir Fraser wrote: >=20 > Looking back over the emails on this topic, someone pointed out a > patch for Linux 2.6.10 that disabled software IRQ affinity for > 1850/2850 systems. >=20 > You can try a similar fix on Xen (either 2.0.x or unstable) by editing > arch/x86/irq.c:pirq_guest_bind(), and remove the following lines: >=20 > if ( desc->handler->set_affinity !=3D NULL ) > desc->handler->set_affinity(); >=20 > If this fixes the I/O hangs for you, it is a nicer fix than > ignorebiostables. I can add a boot parameter to have the same effect, > and also probably have the fix applied automatically for 1850/2850 > systems in the unstable tree (just like Linux). >=20 > Let me know how it works out. >=20 > -- Keir >=20 > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel >