[3847] in arla-drinkers
Re: Arla 0.42-RC2
daemon@ATHENA.MIT.EDU (Tomas Olsson)
Tue Apr 4 03:24:19 2006
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From: Tomas Olsson <tol@stacken.kth.se>
To: nisse@lysator.liu.se (=?iso-8859-1?q?Niels_M=F6ller?=)
Subject: Re: Arla 0.42-RC2
References: <lsrbqvpxoy3.fsf@kashyyyk.ite.kth.se>
<nnpsjy8zsz.fsf@sellafield.lysator.liu.se>
Date: 04 Apr 2006 09:24:10 +0200
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nisse@lysator.liu.se (Niels M=F6ller) writes:
> Apr 3 16:53:02 maskros kernel: Failed to find address of sys_call_table
>
I've got the same issue on my machine. I'll look into it, but this really
shouldn't have much of an impact.
> kernel: Unable to handle kernel NULL pointer dereference at virtual
> address 00000000
>
Not good. The attached patch should fix the problem, it's also in CVS.
> maskros kernel: [do_exit+308/1184] do_exit+0x134/0x4a0
>
Ok, so what happened was that arlad for some reason died before mount,
which triggered the oops. You probably want to start arlad with
"-n --debug=3Dalm" or so to see what happens, or under gdb.
Thanks
/t
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Content-Type: text/x-patch
Content-Disposition: attachment; filename=nnpfs-linux-mutex-init.diff
Content-Description: patch for mutex down oops on arlad exit
Index: arla/nnpfs/linux/nnpfs_dev.c
===================================================================
RCS file: /afs/stacken.kth.se/src/SourceRepository/arla/nnpfs/linux/nnpfs_dev.c,v
retrieving revision 1.115
diff -u -w -r1.115 nnpfs_dev.c
--- arla/nnpfs/linux/nnpfs_dev.c 2005/08/11 09:51:05 1.115
+++ arla/nnpfs/linux/nnpfs_dev.c 2006/04/03 20:56:35
@@ -850,7 +850,10 @@
nnpfs_initq(&nnpfs[i].sleepq);
init_MUTEX(&nnpfs[i].inactive_sem);
init_MUTEX(&nnpfs[i].channel_sem);
+ init_MUTEX(&nnpfs[i].node_sem);
INIT_LIST_HEAD(&nnpfs[i].inactive_list);
+ xn_init_head(&nnpfs[i].node_head);
+ nnpfs[i].nnodes = 0;
}
return 0;
}
Index: arla/nnpfs/linux/nnpfs_vfsops.c
===================================================================
RCS file: /afs/stacken.kth.se/src/SourceRepository/arla/nnpfs/linux/nnpfs_vfsops.c,v
retrieving revision 1.103
diff -u -w -r1.103 nnpfs_vfsops.c
--- arla/nnpfs/linux/nnpfs_vfsops.c 2004/12/22 20:01:59 1.103
+++ arla/nnpfs/linux/nnpfs_vfsops.c 2006/04/03 20:56:02
@@ -216,9 +216,6 @@
nnpfs[minordevice].status |= NNPFS_MOUNTED;
nnpfs[minordevice].sb = sb;
nnpfs[minordevice].root = 0;
- xn_init_head(&nnpfs[minordevice].node_head);
- init_MUTEX(&nnpfs[minordevice].node_sem);
- nnpfs[minordevice].nnodes = 0;
VFS_SET_NNPFS(sb, &nnpfs[minordevice]);
sb->s_op = &nnpfs_sops;
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