> The workaround doesn't seem to work for 64bit,
>
> Can anyone suggest one?
I currently have no xen-3.2.0 64-bit linux system where I could
test such a kmdb patch / workaround.
But after a quick look at the snv_85 64-bit i86xpv code,
it should work like this:
Boot the snv_85 64-bit domU kernel with options "-kd",
so that we stop in the kernel debugger before the kernel
gets started.
And in kmdb:
gnttab_init+0xce/W 403
(this should report that a value of "3" is replaced with "403")
:c
That should start the domU installation from the installation media;
and the same workaround should be used the first time you start
the snv_85 64-bit domU kernel from the installed virtual hdd.
For the 64-bit snv_85 domU kernel, you can make the workaround
permanent by patching the same changed flag values into the
/platform/i86xpv/kernel/amd64/unix file:
# mdb -w /platform/i86xpv/kernel/amd64/unix
gnttab_init+0xce/W 403
$q
(So for 64-bit, you don't have to BFU to snv_87;
the extra flag bit can be directly patched into the
/platform/i86xpv/kernel/amd64/unix file)
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