2.4.12 w/ preempt patch

2.4.12 w/ preempt patch

[steve]

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I got a bug error in my syslog  My machine had been running about 1 day.
it is the 2.4.12 kernel with the preempt-kernel-rml-2.4.12-1.patch 
patch from http://www.tech9.net/rml/linux

anybody know what went wrong, and how to fix it?

thanks,
steve


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Oct 21 06:30:05 lws01 kernel: kernel BUG at slab.c:1241!
Oct 21 06:30:05 lws01 kernel: invalid operand: 0000
Oct 21 06:30:05 lws01 kernel: CPU:    0
Oct 21 06:30:05 lws01 kernel: EIP:    0010:[kmem_cache_alloc+331/472]    Tainted: P 
Oct 21 06:30:05 lws01 kernel: EFLAGS: 00010086
Oct 21 06:30:05 lws01 kernel: eax: 0000001b   ebx: caf58094   ecx: ffffffe2   edx: c2c74000
Oct 21 06:30:05 lws01 kernel: esi: c1407148   edi: 00000044   ebp: 00000246   esp: c2c75f24
Oct 21 06:30:05 lws01 kernel: ds: 0018   es: 0018   ss: 0018
Oct 21 06:30:05 lws01 kernel: Process mandb (pid: 4633, stackpage=c2c75000)
Oct 21 06:30:05 lws01 kernel: Stack: c02806cf 000004d9 caf58e8c fffffff4 caf58e98 c2c74000 00000044 caf58098 
Oct 21 06:30:05 lws01 kernel:        c01122d3 c1407148 000003f0 cd45c000 c1ef4a64 cd9a3fc4 c15f91dc cfd8c810 
Oct 21 06:30:05 lws01 kernel:        c8741a38 caf58e98 cfd8c7f4 cfd8c404 c0112ccb 00000011 cd45c000 c2c74000 
Oct 21 06:30:05 lws01 kernel: Call Trace: [copy_mm+435/812] [do_fork+1107/1796] [sys_fork+19/24] [system_call+51/64] 
Oct 21 06:30:05 lws01 kernel: 
Oct 21 06:30:05 lws01 kernel: Code: 0f 0b 83 c4 08 f6 46 1d 04 74 55 b8 a5 c2 0f 17 87 03 3d 71 
Oct 21 06:30:05 lws01 kernel:  kernel BUG at slab.c:1241!
Oct 21 06:30:05 lws01 kernel: invalid operand: 0000
Oct 21 06:30:05 lws01 kernel: CPU:    0
Oct 21 06:30:05 lws01 kernel: EIP:    0010:[kmem_cache_alloc+331/472]    Tainted: P 
Oct 21 06:30:05 lws01 kernel: EFLAGS: 00010082
Oct 21 06:30:05 lws01 kernel: eax: 0000001b   ebx: caf58094   ecx: ffffffe5   edx: c25c8000
Oct 21 06:30:05 lws01 kernel: esi: c1407148   edi: 00000044   ebp: 00000246   esp: c25c9f38
Oct 21 06:30:05 lws01 kernel: ds: 0018   es: 0018   ss: 0018
Oct 21 06:30:05 lws01 kernel: Process mgetty (pid: 6276, stackpage=c25c9000)
Oct 21 06:30:05 lws01 kernel: Stack: c02806cf 000004d9 40093000 c27b5610 40091000 c1549934 00000044 caf58098 
Oct 21 06:30:05 lws01 kernel:        c0126ccd c1407148 000003f0 40093000 c27b5610 40091000 c25c9fbc 00000002 
Oct 21 06:30:05 lws01 kernel:        c0ca8c24 c25c9fb8 000000a0 c0127051 c1549934 c25c9fb8 40091000 40093000 
Oct 21 06:30:05 lws01 kernel: Call Trace: [mprotect_fixup+677/1268] [sys_mprotect+309/548] [system_call+51/64] 
Oct 21 06:30:05 lws01 kernel: 
Oct 21 06:30:05 lws01 kernel: Code: 0f 0b 83 c4 08 f6 46 1d 04 74 55 b8 a5 c2 0f 17 87 03 3d 71 

Re: 2.4.12 w/ preempt patch

[Robert Love]

On Mon, 2001-10-22 at 18:43, steve wrote:
> I got a bug error in my syslog  My machine had been running about 1 day.
> it is the 2.4.12 kernel with the preempt-kernel-rml-2.4.12-1.patch 
> patch from http://www.tech9.net/rml/linux
> 
> anybody know what went wrong, and how to fix it?

First, get the most recent patch.  revision -3 is out now at
http://tech9.net/rml/linux

Try this.  Even better, try the 2.4.13-pre6 patch against that kernel. 
Either way, a possible race was fixed in the newer versions.

If you still have an oops, try to reproduce it without any binary
modules loaded.

	Robert Love