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possible lockdep crash (was Re: kernel panic, ip_route_input, 2.6.25-rc6-git2)

Previous thread: Scalability requirements for sysv ipc (was: ipc: store ipcs into IDRs) by Manfred Spraul on Friday, March 21, 2008 - 5:41 am. (27 messages)

Next thread: Re: [PATCH 00/12] mm/x86: bootmem by Ingo Molnar on Friday, March 21, 2008 - 6:54 am. (1 message)
[view original message]
From: David Miller <davem@...>
To: <denys@...>
Cc: <netdev@...>, <linux-kernel@...>
Subject: possible lockdep crash (was Re: kernel panic, ip_route_input, 2.6.25-rc6-git2)
Date: Friday, March 21, 2008 - 6:35 am

From: "Denys Fedoryshchenko" <denys@visp.net.lb>


The IP may point to ip_route_input(), but the entire top of the

--
[view original message]
From: Denys Fedoryshchenko <denys@...>
To: David Miller <davem@...>
Cc: <netdev@...>, <linux-kernel@...>
Subject: Re: possible lockdep crash (was Re: kernel panic, ip_route_input, 2.6.25-rc6-git2)
Date: Friday, March 21, 2008 - 6:59 am

Here is one more, it's seems easy to reproduce, but seems it is same. But

maybe will be useful.


Mar 21 12:56:46 205.177.186.74 [   31.387311] BUG: unable to handle kernel

Mar 21 12:56:46 205.177.186.74 paging request

Mar 21 12:56:46 205.177.186.74 at c013d19a

Mar 21 12:56:46 205.177.186.74 [   31.387427] IP:

Mar 21 12:56:46 205.177.186.74 [<c0285798>] ip_route_input+0xa70/0xe56

Mar 21 12:56:46 205.177.186.74 [   31.387505] Oops: 0003 [#1]

Mar 21 12:56:46 205.177.186.74 SMP

Mar 21 12:56:46 205.177.186.74

Mar 21 12:56:46 205.177.186.74 [   31.387602] Modules linked in:

Mar 21 12:56:46 205.177.186.74 softdog

Mar 21 12:56:46 205.177.186.74 nf_nat_pptp

Mar 21 12:56:46 205.177.186.74 nf_nat_proto_gre

Mar 21 12:56:46 205.177.186.74 nf_conntrack_pptp

Mar 21 12:56:46 205.177.186.74 nf_conntrack_proto_gre

Mar 21 12:56:46 205.177.186.74 netconsole

Mar 21 12:56:46 205.177.186.74 configfs

Mar 21 12:56:46 205.177.186.74 hangcheck_timer

Mar 21 12:56:46 205.177.186.74 xt_tcpudp

Mar 21 12:56:46 205.177.186.74 ipt_TTL

Mar 21 12:56:46 205.177.186.74 ipt_ttl

Mar 21 12:56:46 205.177.186.74 xt_NOTRACK

Mar 21 12:56:46 205.177.186.74 iptable_raw

Mar 21 12:56:46 205.177.186.74 iptable_mangle

Mar 21 12:56:46 205.177.186.74 ifb

Mar 21 12:56:46 205.177.186.74 e1000e

Mar 21 12:56:46 205.177.186.74 em_nbyte

Mar 21 12:56:46 205.177.186.74 cls_tcindex

Mar 21 12:56:46 205.177.186.74 act_gact

Mar 21 12:56:46 205.177.186.74 cls_rsvp

Mar 21 12:56:46 205.177.186.74 sch_htb

Mar 21 12:56:46 205.177.186.74 cls_fw

Mar 21 12:56:46 205.177.186.74 act_mirred

Mar 21 12:56:46 205.177.186.74 em_u32

Mar 21 12:56:46 205.177.186.74 sch_red

Mar 21 12:56:46 205.177.186.74 sch_sfq

Mar 21 12:56:46 205.177.186.74 sch_tbf

Mar 21 12:56:46 205.177.186.74 sch_teql

Mar 21 12:56:46 205.177.186.74 cls_basic

Mar 21 12:56:46 205.177.186.74 act_police

Mar 21 12:56:46 205.177.186.74 sch_gred

Mar 21 12:56:46 205.177.186.74 act_pedit

Mar 21 12:56:46 205.177.186.74 sch_hfsc

Mar 21 12:56:46 205.177.186.74 cls_rsvp6

Mar 21 12:56:...
[ message continues ]
[view original message]
From: Denys Fedoryshchenko <denys@...>
To: David Miller <davem@...>
Cc: <netdev@...>, <linux-kernel@...>
Subject: Re: possible lockdep crash (was Re: kernel panic, ip_route_input, 2.6.25-rc6-git2)
Date: Friday, March 21, 2008 - 6:54 am

Let me know if i can improve output to help debugging.

If possible it must be minimal risk to hang, cause router is in very

difficult to reach area.


--

Denys Fedoryshchenko

Technical Manager

Virtual ISP S.A.L.


--
[view original message]
From: David Miller <davem@...>
To: <denys@...>
Cc: <netdev@...>, <linux-kernel@...>
Subject: Re: possible lockdep crash
Date: Friday, March 21, 2008 - 7:04 am

From: "Denys Fedoryshchenko" <denys@visp.net.lb>


Can you disable lockdep and see if the problem persists?


It's killing your routing performance anyways, I have no

idea why you have it enabled.

--
[view original message]
From: Denys Fedoryshchenko <denys@...>
To: David Miller <davem@...>
Cc: <netdev@...>, <linux-kernel@...>
Subject: Re: possible lockdep crash
Date: Friday, March 21, 2008 - 8:46 pm

Here is panic without lockdep. Note - i am using FIB_TRIE.


Mar 22 02:42:23 205.177.186.74 [    6.891998] BUG: unable to handle kernel

Mar 22 02:42:23 205.177.186.74 NULL pointer dereference

Mar 22 02:42:23 205.177.186.74 at 0000009f

Mar 22 02:42:23 205.177.186.74 [    6.892094] IP:

Mar 22 02:42:23 205.177.186.74 [<c0276f0a>] ip_route_input+0x872/0xbd9

Mar 22 02:42:23 205.177.186.74 [    6.892166] Oops: 0002 [#1]

Mar 22 02:42:23 205.177.186.74 SMP

Mar 22 02:42:23 205.177.186.74

Mar 22 02:42:23 205.177.186.74 [    6.892258] Modules linked in:

Mar 22 02:42:23 205.177.186.74 netconsole

Mar 22 02:42:23 205.177.186.74 configfs

Mar 22 02:42:23 205.177.186.74 hangcheck_timer

Mar 22 02:42:23 205.177.186.74 xt_tcpudp

Mar 22 02:42:23 205.177.186.74 ipt_TTL

Mar 22 02:42:23 205.177.186.74 ipt_ttl

Mar 22 02:42:23 205.177.186.74 xt_NOTRACK

Mar 22 02:42:23 205.177.186.74 iptable_raw

Mar 22 02:42:23 205.177.186.74 iptable_mangle

Mar 22 02:42:23 205.177.186.74 ifb

Mar 22 02:42:23 205.177.186.74 e1000e

Mar 22 02:42:23 205.177.186.74 em_nbyte

Mar 22 02:42:23 205.177.186.74 cls_tcindex

Mar 22 02:42:23 205.177.186.74 act_gact

Mar 22 02:42:23 205.177.186.74 cls_rsvp

Mar 22 02:42:23 205.177.186.74 sch_htb

Mar 22 02:42:23 205.177.186.74 cls_fw

Mar 22 02:42:23 205.177.186.74 act_mirred

Mar 22 02:42:23 205.177.186.74 em_u32

Mar 22 02:42:23 205.177.186.74 sch_red

Mar 22 02:42:23 205.177.186.74 sch_sfq

Mar 22 02:42:23 205.177.186.74 sch_tbf

Mar 22 02:42:23 205.177.186.74 sch_teql

Mar 22 02:42:23 205.177.186.74 cls_basic

Mar 22 02:42:23 205.177.186.74 act_police

Mar 22 02:42:23 205.177.186.74 sch_gred

Mar 22 02:42:23 205.177.186.74 act_pedit

Mar 22 02:42:23 205.177.186.74 sch_hfsc

Mar 22 02:42:23 205.177.186.74 cls_rsvp6

Mar 22 02:42:23 205.177.186.74 sch_ingress

Mar 22 02:42:23 205.177.186.74 em_meta

Mar 22 02:42:23 205.177.186.74 em_text

Mar 22 02:42:23 205.177.186.74 act_ipt

Mar 22 02:42:23 205.177.186.74 sch_dsmark

Mar 22 02:42:23 205.177.186.74 sch_prio

Mar 22 02:42:23 205.177.186....
[ message continues ]
[view original message]
From: Denys Fedoryshchenko <denys@...>
To: David Miller <davem@...>
Cc: <netdev@...>, <linux-kernel@...>
Subject: Re: possible lockdep crash
Date: Friday, March 21, 2008 - 11:23 am

I have very strange lockups on this machine, and i tried to catch them. But

seems it doesn't help me, till now lockdep catch only ifb false-positive.


I will try to compile and run now without lockdep.


--

Denys Fedoryshchenko

Technical Manager

Virtual ISP S.A.L.


--
Previous thread: Scalability requirements for sysv ipc (was: ipc: store ipcs into IDRs) by Manfred Spraul on Friday, March 21, 2008 - 5:41 am. (27 messages)

Next thread: Re: [PATCH 00/12] mm/x86: bootmem by Ingo Molnar on Friday, March 21, 2008 - 6:54 am. (1 message)