From: "Randy.Dunlap" <rddunlap@osdl.org>
To: Ricky Beam <jfbeam@bluetronic.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: overlaping printk
Date: Wed, 19 May 2004 08:39:26 -0700 [thread overview]
Message-ID: <20040519083926.7ac5d923.rddunlap@osdl.org> (raw)
In-Reply-To: <Pine.GSO.4.33.0405191110380.14297-100000@sweetums.bluetronic.net>
On Wed, 19 May 2004 11:19:15 -0400 (EDT) Ricky Beam wrote:
| Can anyone explain why the kernel does this on a serial console:
|
| C<PU0 >C2P:U M 3a:ch Mianech iCnhee cCk heExckc epEtxcieopnt: i0o0n0: 0000000000
| 0000000000000040
| 00C4P
| U 2C:P UE 3IP:: E cI0P:1 0c10fa108 1fEFa8L AEGSF:L AG00S0:0 00200460
| 0246 e
| ax: e 0ax00: 0000000000 0eb00x: ebfx7f: a6f070f0a4 0ec00x: e0c2x:a7 a02bea
| 7e aebedxe : efdx7f: a6f700f0a4
| 000 e
| si e: sif7: faf76f0a0040 e0d0i e:d ci0: 10c01f107e1f e7be p:eb 0p:00 000000
| 00000 e00sp e:s fp:7 faf77ffab45
| fb4*
| ** **Ba*n kBa 0nk: 00:00 0000000000000000000000000000[00[0000000000000000000000
| 0000000]00] a at t 00000000000000000000000000000000
|
| ***** * BaBankn k1 1: :0 000000000000000000000000000000g0eneral protection fault
| : 0000 [#1]
| ...
|
| That's two MCE's being printed at the exact same time. (CPU2 & 3 are a single
| P4 Xeon.) It makes it real damn hard to debug when the errors are printed
| like that.
|
| The GPF was printed correctly:
| CPU: 3
| EIP: 0060:[<c010c0a7>] Not tainted
| EFLAGS: 00010282 (2.6.6-SMP-rc3+BK@1.1386)
| EIP is at intel_machine_check+0x12b/0x364
| eax: 0000001f ebx: 00000004 ecx: 00000407 edx: 00006f52
| esi: 00000407 edi: 00000000 ebp: 00000000 esp: f7fa5f04
| ds: 007b es: 007b ss: 0068
| Process swapper (pid: 0, threadinfo=f7fa4000 task=f7fa85c0)
| Stack: c0304002 00000001 00000000 00000000 f7fa5fb4 0000000f c0120adc 00000003
| 00000001 00000000 00000004 00000001 00000000 f7fa4000 02a7abee f7fa4000
| f7fa4000 c0101f7e 00000000 f7fa5fb4 00000246 c0101fa8 00000046 c03cf108
| Call Trace:
| [<c0120adc>] run_timer_softirq+0x110/0x180
| [<c0101f7e>] default_idle+0x0/0x2d
| [<c0101fa8>] default_idle+0x2a/0x2d
| [<c010bf7c>] intel_machine_check+0x0/0x364
| [<c01049b5>] error_code+0x2d/0x38
| [<c0101f7e>] default_idle+0x0/0x2d
| [<c0101fa8>] default_idle+0x2a/0x2d
| [<c010201c>] cpu_idle+0x37/0x40
| [<c0119558>] printk+0x172/0x1a8
| [<c03b2981>] print_cpu_info+0x86/0xd2
|
| Code: 0f 32 81 c3 02 04 00 00 89 44 24 08 89 54 24 04 c7 04 24 f7
|
| I wouldn't trust it as it was on the MCE'ing processor.
|
| Note: The answer to "which kernel" is ALL of them. (even the bastard stepchild
| redhat 2.4 kernel will do it.)
|
| It goes on to have a fit unblanking a never blanked VT. Stupid kernel!
I've seen it on SMP also (like Tigran). A patch has been posted
for this a few times, by David Howells. The latest one that I
see is here:
http://marc.theaimsgroup.com/?l=linux-kernel&m=103001834526258&w=2
Don't know how valid it is now.
--
~Randy
next prev parent reply other threads:[~2004-05-19 15:51 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-19 15:19 Ricky Beam
2004-05-19 15:26 ` Tigran Aivazian
2004-05-19 15:31 ` Ricky Beam
2004-05-19 15:39 ` Randy.Dunlap [this message]
2004-05-20 7:21 ` Andrew Morton
2004-05-19 15:55 Tuukka Toivonen
2004-05-19 16:03 ` Ricky Beam
2004-05-20 14:03 ` Ingo Molnar
[not found] <1XBEP-Mc-49@gated-at.bofh.it>
[not found] ` <1XBXw-13D-3@gated-at.bofh.it>
[not found] ` <1XWpp-zy-9@gated-at.bofh.it>
2004-05-20 14:53 ` Andi Kleen
2004-05-20 15:19 ` Ingo Molnar
2004-05-20 15:53 ` Ingo Molnar
2004-05-20 16:19 ` Andy Isaacson
2004-05-20 18:57 ` Ingo Molnar
2004-05-20 23:11 ` Andrew Morton
2004-05-21 7:00 ` Ingo Molnar
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