Re: oops in __bounce_end_io_read under kvm

Christoph Hellwig
2009-01-01T21:08:49Z

On Sun, Dec 28, 2008 at 07:25:00PM +0100, Jens Axboe wrote:
> On Sun, Dec 28 2008, Christoph Hellwig wrote:
> > On Sun, Dec 28, 2008 at 07:10:59PM +0100, Jens Axboe wrote:
> > > Is this -rc9 stock + xfs patches, or does it include -mm or -next
> > > patches (or the block patches)?
> >
> > Just -rc9 and xfs updates. The only change outside of fs/xfs/ is a new
> > define in fs.h and a couple new helpers in inode.c
>
> OK, then it's surely a new bug. Could you do a gdb l *0xbla on that
> address to check where it's faulting?

It took a while to reproduce it again, but I got it again today.

(gdb) l *0xc01a5444
0xc01a5444 is in __bounce_end_io_read
(/home/hch/work/xfs/arch/x86/include/asm/string_32.h:35).
30 extern size_t strlen(const char *s);
31
32 static __always_inline void *__memcpy(void *to, const void *from, size_t n)
33 {
34 int d0, d1, d2;
35 asm volatile("rep ; movsl\n\t"
36 "movl %4,%%ecx\n\t"
37 "andl $3,%%ecx\n\t"
38 "jz 1f\n\t"
39 "rep ; movsb\n\t"