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Re: [Xen-devel] xen.git branch reorg / crash with 2.6.30-rc3 pv_ops dom0

To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-devel] xen.git branch reorg / crash with 2.6.30-rc3 pv_ops dom0
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Sat, 25 Apr 2009 16:34:00 -0700
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Pasi Kärkkäinen wrote:
On Thu, Apr 23, 2009 at 11:32:14AM -0700, Jeremy Fitzhardinge wrote:
Pasi Kärkkäinen wrote:
I'll try upgrading from dom0/hackery to xen-tip/next and see how it works
for me.

It seems latest tree crashes for me (happened yesterday, and also today, just 
rebuilt the latest commits):

This is xen-tip/next? Does master work any better? How about running as domU?


Zone PFN ranges:
  DMA      0x00000010 -> 0x00001000
  Normal   0x00001000 -> 0x000229fe
  HighMem  0x000229fe -> 0x00040000
Movable zone start PFN for each node
early_node_map[3] active PFN ranges
    0: 0x00000010 -> 0x0000009f
    0: 0x00000100 -> 0x00001167
    0: 0x00001268 -> 0x00040000
(XEN) d0:v0: unhandled page fault (ec=0003)
(XEN) Pagetable walk from c1268000:
(XEN)  L3[0x003] = 000000003c8f0001 000008f0
(XEN) L2[0x009] = 000000003d276067 00001276 (XEN) L1[0x068] = 000000003d268061 00001268
(XEN) domain_crash_sync called from entry.S (ff19f70e)
(XEN) Domain 0 (vcpu#0) crashed on cpu#0:
(XEN) ----[ Xen-3.3.1-11.fc11  x86_32p  debug=n  Not tainted ]----
(XEN) CPU:    0
(XEN) EIP:    e019:[<c088adae>]
(XEN) EFLAGS: 00000206   EM: 1   CONTEXT: pv guest
(XEN) eax: 00000000   ebx: 00800000   ecx: 00200000   edx: c1268000
(XEN) esi: 01268000   edi: c1268000   ebp: c086de5c   esp: c086de1c
(XEN) cr0: 8005003b   cr4: 000006f0   cr3: 3c85c000   cr2: c1268000
(XEN) ds: e021   es: e021   fs: e021   gs: e021   ss: e021   cs: e019
(XEN) Guest stack trace from esp=c086de1c:

[root@dom0test linux-2.6-xen]# gdb ./vmlinux
(gdb) x/i 0xc086de1c
0xc086de1c <init_thread_union+3612>:    add    %al,(%eax)

32b PAE dom0, 32b PAE hypervisor.

Btw how does dom0 upstreaming look at the moment? Ingo sent pull request
about some changes, and those got merged, but how about the rest?
Ingo basically ignored all the Xen changes in the leadup to the merge window, then stomped on my attempt to get them merged with Linus, which was all pretty annoying. It had the doubly-irritating side-effect of casting doubt over the controversy-free domU changes, so they didn't get merged in the merge window either; by the time Ingo got around to OKing them, the window had closed. So all that got merged in the end was the must-have bug fixes.

Yeah.. :( I really hope next merge window will be better..

Linus isn't going to pull any more major functionality changes in the -rc kernels, and certainly isn't going to make an exception for Xen. So we're stuck with waiting for the .31 merge window.

I think it might be a good idea to start sending the patches already now, so
they get enough review before the .31 merge window..
-- Pasi

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