Re: [Xen-devel] [PATCH] xen,tools: pincpu use vcpu and cpumap_t

[Mike Wray <mike.wray@xxxxxx>]

Ryan Harper wrote:
> Here is an update to the previous pincpu patches.  This patch updates
> the pincpu dom0op to use a cpumap_t pointer, rather than specifying a
> size in the interface.  cpumap_t is current typedef'ed to an unsigned
> long.  xm list -v now truncates the cpumap field to only show the bits
> of the map that are relevant.  That is, if you have four VCPUS, you will
> only see the first four bits of the cpumap.  
>
> This patch compiles against current unstable tree, but I could not test
> it as the current unstable tree crashes dom0 when booting domU.  I back
> ported the patch to 20050420 snapshot and it worked there.
This patch causes the dom0 crash I reported on the current unstable
(attached) so it needs fixing before applying.

Mike

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To:	xen-devel@xxxxxxxxxxxxxxxxxxx
Subject:	[Xen-devel] Reproducible dom-0 crash
From:	Mike Wray <mike.wray@xxxxxx>
Date:	Fri, 29 Apr 2005 11:44:29 +0100
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Using unstable as of change set 1.1389.1.12 05/04/29 09:30,
I get the following dom-0 crash when xend starts:

(XEN) BUG at domain.c:136
(XEN) CPU:    0
(XEN) EIP:    0808:[<ff1057bc>]
(XEN) EFLAGS: 00010292   CONTEXT: hypervisor
(XEN) eax: 00000000   ebx: ff18c900   ecx: 000003f8   edx: 00000000
(XEN) esi: ff18b080   edi: feeea000   ebp: feee9000   esp: ff103f24
(XEN) ds: 0810   es: 0810   fs: 0810   gs: 0810   ss: 0810   cs: 0808
(XEN) Stack trace from ESP=ff103f24:
(XEN)    ff1455ec ff145622 00000088 c000eb4c 000002d3 000002d3 ff19c000 
[ff11e91f]
(XEN)    0c2d3063 ff18c900 e0000000 00000008 fe310ae8 0c2ba063 ff18cb00 00000000
(XEN)    00000001 00000000 ff18c900 ff18c900 c4293f54 ff18b080 ff103fb8 
[ff129f63]
(XEN)    ff18c900 00000000 0000c2d2 0000c2d2 feee8bfc 0c2d2bfc 00000000 ff18b080
(XEN)    c42d4000 00000000 00000000 [ff1346fe] ff103fb8 ffffffff c42d3000 
0c2d3063
(XEN)    c42d4000 00000000 00000000 0000eb4c 000e0000 c01145e9 00000061 00010287
(XEN)    c4293f54 00000069 0000007b 0000007b 00000000 00000000 ff18b080
(XEN) Call Trace from ESP=ff103f24:
(XEN)    [<ff11e91f>] [<ff129f63>] [<ff1346fe>]

****************************************
CPU0 FATAL TRAP: vector = 6 (invalid operand)
[error_code=0000]
Aieee! CPU0 is toast...
****************************************

Mike

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