[OpenAFS-devel] Fwd: XEN and openafs-modules-source

[Chaskiel M Grundman]

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--On Saturday, October 08, 2005 11:59:42 PM -0400 Chaskiel M Grundman=20
<cg2v@andrew.cmu.edu> wrote:

> 2) Xen appears to support spin_lock_irq{,save} and
> local_irq_{enable,disable}, so I don't know what the user is actually
> complaining about. I suppose I could boot my xen kernel and try to
> compile/load afs on it...

Well, there is some sort of problem. osi_linux_mask triggers a GPF on xenU=20
kernels, inside SIGMASK_LOCK(), which is the thing that calls=20
spin_lock_irq.

There's an actual cli instruction visible in the disassembly. _that_ is the =

bug:

00058ad7 <osi_linux_mask>:
   58ad7:       53                      push   %ebx
   58ad8:       fa                      cli
   58ad9:       bb 00 e0 ff ff          mov    $0xffffe000,%ebx
   58ade:       21 e3                   and    %esp,%ebx
   58ae0:       83 43 14 01             addl   $0x1,0x14(%ebx)


This appears to be because things think ARCH=3Di686 and not ARCH=3Dxen. if =
I=20
munge the MakefileProto.LINUX to say ARCH=3Dxen when it calls into kbuild,=20
then it works. When real xen support is added to the tree, a sane way of=20
dealing with this will need to be thought out.
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