From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeremy Fitzhardinge Subject: Re: Re: pv_ops dom0 USB fixed Date: Fri, 19 Dec 2008 09:39:09 -0800 Message-ID: <494BDC3D.1070804@goop.org> References: <4940210C.1060401@goop.org> <4942D0F9.7080903@goop.org> <4942E6FD.6080601@goop.org> <1e16a9ed0812131102s79d231depef1466fda8e2b897@mail.gmail.com> <1e16a9ed0812131753m3412e3ffgd9028185c90c2c40@mail.gmail.com> <1229334549.25349.82.camel@zakaz.uk.xensource.com> <1e16a9ed0812151015v50867776l100c1830380f8411@mail.gmail.com> <4946BBF5.30508@goop.org> <49493182.9070707@redhat.com> <49495403.1000400@goop.org> <494A1335.60609@redhat.com> <494AB29C.7030902@goop.org> <494B919A.9070803@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <494B919A.9070803@redhat.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Gerd Hoffmann Cc: deshantm@gmail.com, Aviv Grafi , Xen-devel , Andrew Lyon , Ian Campbell List-Id: xen-devel@lists.xenproject.org Gerd Hoffmann wrote: > Jeremy Fitzhardinge wrote: > >> Can you try changing include/linux/libata.h: >> >> -#undef ATA_DEBUG /* debugging output */ >> +#define ATA_DEBUG /* debugging output */ >> > > Log became a bit longer ... > http://kraxel.fedorapeople.org/for-jeremy/ > > There is also a (maybe related) BUG in there. > > It fails notably faster now, early in the init scripts. Some race > maybe? The timing changes due to the excessive debug output makes it > happen more likely? > Well, it doesn't explain why it happens instantly for everyone else, unless there's some really odd timing issue going on. Is your xen the xen-unstable tip? Do you have DEBUG=y enabled? >> Also, does swiotlb=0 make any difference? >> > > It doesn't. Hmm, from the boot messages it looks like it doesn't > actually disable the swiotb ... Oh, maybe "iommu=off" then? J