Date: Wed, 9 Sep 2009 22:02:28 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-stable@freebsd.org, Vincent Hoffman <vince@unsane.co.uk> Subject: Re: general protection fault on boot. Message-ID: <20090909190228.GC47688@deviant.kiev.zoral.com.ua> In-Reply-To: <200909091339.00193.jhb@freebsd.org> References: <4AA7D8B3.1010203@unsane.co.uk> <200909091339.00193.jhb@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
--w2Ze1fp8mKggy7lw Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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. > > =20 > > backtrace is available at > > http://unsane.co.uk/~jhary/freebsd/GPF-09-09-09.gif=20 > > 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. > >=20 > > Let me know if I need to provide any more info. >=20 > Hmm, can you try reverting 196737? Or actually, can you print out the va= lue=20 > of %ebx ('p $ebx' in ddb will work I think)? I wonder if this patch woul= d=20 > fix it: >=20 > Index: pmap.c > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > --- pmap.c (revision 196974) > +++ pmap.c (working copy) > @@ -999,7 +999,7 @@ > * coherence domain. > */ > mfence(); > - for (; sva < eva; sva +=3D cpu_clflush_line_size) > + for (; sva <=3D eva; sva +=3D 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_offse= t_t eva) * coherence domain. */ mfence(); - for (; eva < sva; eva +=3D cpu_clflush_line_size) - clflush(eva); + for (; sva < eva; sva +=3D cpu_clflush_line_size) + clflush(sva); mfence(); } else { =20 --w2Ze1fp8mKggy7lw Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (FreeBSD) iEYEARECAAYFAkqn+8IACgkQC3+MBN1Mb4iLZACfc8+868+lMdSftGZ1wH2sIcSr 0VoAnjqHi69YrBcjQlrmPgOcx9vJfBPg =wZdP -----END PGP SIGNATURE----- --w2Ze1fp8mKggy7lw--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20090909190228.GC47688>