[Xen-devel] trouble with the new mmap-batch interface

[Brendan Cully <brendan@xxxxxxxxx>]

Hi all,

I'm having some trouble with the new mmap-batch ioctl. With ioemu
revision a0066d "use new (replacement) mmap-batch ioctl" applied, my
HVM domain dies as soon as it is unpaused. The first suspicious line
in xm dmesg is

(XEN) HVM3:  - REP INSB across page boundaries ... Bad value at 0x005ffffc: saw 
00000000 e
(XEN) HVM3: xpected ff000000
(XEN) HVM3: Bad value at 0x00601000: saw 00000000 expected 000000ff
(XEN) HVM3: failed

and the qemu log ends at
cirrus vga map change while on lfb mode

If I revert to ioemu 3b531c "passthrough: fix a printf format
specifier" then the INSB test passes and the domain runs fine.

I'm running 32-bit 2.6.18.8 dom0 (984:0bec29c94ce9), 32-bit HVM guest,
and 64-bit xen (Tue Jan 19 15:44:54 2010 +0000 20824:07f95839e431)

It seems unlikely to me that this is actual breakage, but I've built
world a couple of times. Before I put printfs everywhere I thought I'd
ask if anyone else had seen this or had any ideas.

Thanks,
Brendan

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