Re: [uml-devel] 2.6.15-rc2

[Blaisorblade <blaisorblade@yahoo.it>]

On Wednesday 30 November 2005 05:20, Michael Richardson wrote:
> Running a kernel which is not 2.6.15-rc2 (but a couple of merges back,
> looking for a place where it works), I get:

> If I try with "mode=tt", (vs skas0) it boots, but on shutdown, I get:

I got it too, and actually I think it's triggerable by playing with proc 
(something like ps with the "l" flag should do, but never tested). I've even 
diagnosed and sent a report to Jeff, we just need to fix it up.

It was introduced in the sysrq-t patch - some macros return 0xdeadbeef when 
SKAS mode is compile-time disabled, and have only a SKAS implementation 
(which is broken for TT mode but is used there too).

Btw, it was not in the first Allan's version that bug, it was introduced 
later.

> EIP: 0073:[<40101e18>] CPU: 0 Not tainted ESP: 007b:bf8cec8c EFLAGS:
> 00000246 Not tainted
> EAX: ffffffda EBX: 40189880 ECX: ffffffff EDX: 00000000
> ESI: bf8ced38 EDI: 00000000 EBP: bf8cec98 DS: 007b ES: 007b
> a09ff800:  [<a00395bf>] show_regs+0x1cf/0x1e0
> a09ff828:  [<a001d25c>] panic_exit+0x2c/0x50
> a09ff838:  [<a00506cd>] notifier_call_chain+0x2d/0x50
> a09ff858:  [<a003d922>] panic+0x72/0x110
> a09ff874:  [<a0022d1e>] wait_stub_done+0xfe/0x180
> a09ff8f4:  [<a0023792>] copy_context_skas0+0x1c2/0x270
> a09ff9d4:  [<a0022aac>] init_new_context_skas+0x11c/0x1b0
> a09ffa08:  [<a003bf97>] copy_mm+0x367/0x3a0
> a09ffa50:  [<a003c969>] copy_process+0x499/0xe60
> a09ffb40:  [<a003d39e>] do_fork+0x6e/0x1ca
> a09ffbac:  [<a001a33b>] sys_fork+0x8b/0xb0
> a09ffbe0:  [<a0024512>] handle_syscall+0x112/0x140
> a09ffc5c:  [<a0022ed1>] handle_trap+0x31/0x140
> a09ffc84:  [<a002357a>] userspace+0x1da/0x230
> a09ffce0:  [<a0023f35>] new_thread_handler+0xe5/0x120
> a09ffd20:  [<a01cb468>] __restore+0x0/0x8

-- 
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade

	

	
		
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