Hello,

I have tested the following kernels :

2.6.12.3
2.6.12.6
2.6.13.4

and I get the same problems : a kernel panic, this is my output :

Serial line 0 assigned device '/dev/ptyp1'
Kernel panic - not syncing: Segfault with no mm

EIP: 0023:[<a004e968>] CPU: 0 Not tainted ESP: 002b:a0367a74 EFLAGS: 00010292
    Not tainted         
        EAX: 00000000 EBX: a3ecc000 ECX: a09956e0 EDX: a093a340
        ESI: a0800660 EDI: 00000000 EBP: a080066c DS: 002b ES: 002b
        a03675c8:  [<a00374c2>] notifier_call_chain+0x1e/0x38
        a03675e8:  [<a0028f79>] panic+0x55/0x104
        a03675f8:  [<a0011d43>] change_sig+0x4b/0x60
        a0367608:  [<a0013a29>] segv+0x1b5/0x244
        a0367620:  [<a004611f>] __do_IRQ+0x47/0xcc
        a0367668:  [<a0011d99>] change_signals+0x41/0x6c
        a03676e8:  [<a0013d5d>] segv_handler+0xc1/0xcc
        a03676f8:  [<a004e968>] free_block+0x3c/0xc8
        a0367708:  [<a0011dde>] unblock_signals+0xa/0x10
        a0367718:  [<a0016a62>] sig_handler_common_tt+0xb6/0x130
        a0367728:  [<a0016aa9>] sig_handler_common_tt+0xfd/0x130
        a0367778:  [<a0021b98>] sig_handler+0x14/0x18
        a0367798:  [<a01ae838>] __restore+0x0/0x8
        a03677d8:  [<a004e968>] free_block+0x3c/0xc8
        a0367900:  [<a01aeb2b>] sigemptyset+0x1b/0x38
        a0367920:  [<a0011d43>] change_sig+0x4b/0x60
        a0367940:  [<a01aeb2b>] sigemptyset+0x1b/0x38
        a0367960:  [<a01aeb2b>] sigemptyset+0x1b/0x38
        a0367980:  [<a01aeb2b>] sigemptyset+0x1b/0x38
        a03679a0:  [<a0011edc>] set_signals+0x6c/0x10c
        a0367a00:  [<a01aeb2b>] sigemptyset+0x1b/0x38
        a0367a20:  [<a0011d99>] change_signals+0x41/0x6c
        a0367a50:  [<a000f7e4>] __virt_to_page+0xc/0x1c
        a0367a70:  [<a004e960>] free_block+0x34/0xc8
        a0367aa0:  [<a004eea3>] drain_array_locked+0x63/0x88
        a0367ad0:  [<a004ef3d>] cache_reap+0x75/0x14c
        a0367b00:  [<a003ab69>] worker_thread+0x1f9/0x2a4
        a0367b10:  [<a003aaf2>] worker_thread+0x182/0x2a4
        a0367b28:  [<a004eec8>] cache_reap+0x0/0x14c
        a0367b6c:  [<a0026024>] default_wake_function+0x0/0x14
        a0367b8c:  [<a0026024>] default_wake_function+0x0/0x14
        a0367ba8:  [<a003a970>] worker_thread+0x0/0x2a4
        a0367bb8:  [<a003a970>] worker_thread+0x0/0x2a4
        a0367bc0:  [<a003e532>] kthread+0xbe/0xc8
        a0367bc8:  [<a003a970>] worker_thread+0x0/0x2a4
        a0367bd0:  [<a003e4f9>] kthread+0x85/0xc8
        a0367bf4:  [<a003e474>] kthread+0x0/0xc8
        a0367c00:  [<a0010039>] run_kernel_thread+0x45/0x4c
        a0367c10:  [<a0011d99>] change_signals+0x41/0x6c
        a0367c18:  [<a003e474>] kthread+0x0/0xc8
        a0367c28:  [<a0010014>] run_kernel_thread+0x20/0x4c
        a0367cb0:  [<a0011dde>] unblock_signals+0xa/0x10
        a0367cc4:  [<a003e474>] kthread+0x0/0xc8
        a0367cd0:  [<a00153b8>] new_thread_handler+0x140/0x17c
        a0367cd4:  [<a003e474>] kthread+0x0/0xc8
        a0367d20:  [<a01ae838>] __restore+0x0/0x8
        a0367d60:  [<a01aea61>] sigprocmask+0x1d/0x4c
        
I got this after upgrading my system to Debian unstable.

I disabled tls by moving it to tls.bak, but this does not help. I also removed
the anticipatory scheduler and the QIC (or whatever scheduler), because I got
kernel panics earlier in the cycle.

I also removed SKAS, because this gave me also kernel panics.

Are there other things that I can do to recompile my kernel and get a stable
system again ?

Regards,

Jurgen


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