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Date:	Sat, 1 Dec 2007 22:03:22 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	linux-kernel@...r.kernel.org
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Stephen Hemminger <shemminger@...ux-foundation.org>
Subject: [bug] cops/atalk hung bootup with 2.6.23-rc4


with a random config kernel i'm getting this during bootup:

[   23.061449] cops.c:v0.04 6/7/98 Jay Schulist <jschlst@...ba.org>
[   23.067416] lt0: cops at 0x240, IRQ 5, in Tangent mode
[   23.106029] lt0: Bad packet length of 65535 bytes.
[   23.144185] lt0: Bad packet length of 65535 bytes.
[   23.182342] lt0: Bad packet length of 65535 bytes.
[   23.220498] lt0: Bad packet length of 65535 bytes.
[   23.258655] lt0: Bad packet length of 65535 bytes.

ad infinitum, with occasional OOMs:

[  279.437756] swapper: page allocation failure. order:5, mode:0x4020
[  279.443900] Pid: 1, comm: swapper Not tainted 2.6.24-rc3-cfs-v24 #591
[  279.450312]  [<c0165859>] __alloc_pages+0x319/0x3f0
[  279.455165]  [<c0165969>] __get_free_pages+0x39/0x50
[  279.460104]  [<c0743875>] __alloc_skb+0x55/0x120
[  279.464696]  [<c04be006>] cops_rx+0x66/0x290
[  279.468943]  [<c04be979>] cops_interrupt+0x49/0xe0
[  279.473710]  [<c015aae0>] handle_IRQ_event+0x30/0x60
[  279.478649]  [<c015c24d>] handle_fasteoi_irq+0x6d/0xe0
[  279.483762]  [<c0108d0b>] do_IRQ+0x3b/0x70
[  279.487836]  [<c0106b3b>] common_interrupt+0x23/0x28

and a hung bootup. Config and bootlog attached. I guess the core problem 
is that somehow the the cops driver got registered to IRQ5:

[   23.067416] lt0: cops at 0x240, IRQ 5, in Tangent mode

is this an old ISA driver perhaps that should i exclude from this 
randconfig testing?

	Ingo

View attachment "boot.log" of type "text/plain" (113390 bytes)

View attachment "config" of type "text/plain" (46913 bytes)

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