Kostik Belousov wrote: > On Wed, Sep 09, 2009 at 01:38:59PM -0400, John Baldwin wrote: > >> On Wednesday 09 September 2009 12:32:51 pm Vincent Hoffman wrote: >> >>> Hi all, >>> I've been running the 8.0-BETAs in a xen virtual machine >>> (hvm/fully virtualised) for testing and something between r196730 and >>> r196746 causes a general protection fault on boot. I'll try and narrow >>> it down if i get a chance but I'm a a bit busy at the moment. >>> >>> backtrace is available at >>> http://unsane.co.uk/~jhary/freebsd/GPF-09-09-09.gif >>> Xen dom0 is a centos5.3 box using the xen-3.3.1 rpms from >>> http://www.gitco.de/linux/i386/centos/5/rpms/ if thats of any use. >>> >>> Let me know if I need to provide any more info. >>> >> Hmm, can you try reverting 196737? Or actually, can you print out the value >> of %ebx ('p $ebx' in ddb will work I think)? I wonder if this patch would >> fix it: >> >> Index: pmap.c >> =================================================================== >> --- pmap.c (revision 196974) >> +++ pmap.c (working copy) >> @@ -999,7 +999,7 @@ >> * coherence domain. >> */ >> mfence(); >> - for (; sva < eva; sva += cpu_clflush_line_size) >> + for (; sva <= eva; sva += cpu_clflush_line_size) >> clflush(sva); >> mfence(); >> } else { >> > > Oh, no, another pointy hat to me :(. > > Please, try this patch instead. > > diff --git a/sys/i386/xen/pmap.c b/sys/i386/xen/pmap.c > index 4b81aae..122318c 100644 > --- a/sys/i386/xen/pmap.c > +++ b/sys/i386/xen/pmap.c > @@ -1004,8 +1004,8 @@ pmap_invalidate_cache_range(vm_offset_t sva, > vm_offset_t eva) > * coherence domain. > */ > mfence(); > - for (; eva < sva; eva += cpu_clflush_line_size) > - clflush(eva); > + for (; sva < eva; sva += cpu_clflush_line_size) > + clflush(sva); > mfence(); > } else { > > Hi, I tried this this morning with no joy i'm afraid. not much change but new backtrace (with p $ebx) at http://www.unsane.co.uk/~jhary/freebsd/10-09-09.gif
Just to check I'm not in need of more coffee as i'm still learning svn (and my coding skills such as they are lie in shell and perl) krill# svn info Path: . URL: svn://svn.freebsd.org/base/stable/8 Repository Root: svn://svn.freebsd.org/base Repository UUID: ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f Revision: 196740 Node Kind: directory Schedule: normal Last Changed Author: rnoland Last Changed Rev: 196737 Last Changed Date: 2009-09-01 17:41:28 +0100 (Tue, 01 Sep 2009) krill# sed -n '1010,1017p' sys/i386/xen/pmap.c * coherence domain. */ mfence(); for (; sva < eva; sva += cpu_clflush_line_size) clflush(sva); mfence(); } else { krill# Happy to give vnc access to the console of the machine if that would help. Vince _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"