Here, i suspect memory corruption as the identical kernel runs on identical hardware with identical installation on 60+ Machines. Before the crash i see this in the syslog .. Sep 30 14:41:36 mgr2 kernel: swap_free: swap-space map bad (entry 00000100) Sep 30 14:41:36 mgr2 kernel: swap_free: swap-space map bad (entry 00000100) Sep 30 14:41:36 mgr2 kernel: swap_free: swap-space map bad (entry 00000900) Sep 30 14:41:36 mgr2 kernel: swap_free: swap-space map bad (entry 00000100) Sep 30 14:41:36 mgr2 kernel: swap_free: swap-space map bad (entry 00000800) Sep 30 14:41:36 mgr2 kernel: swap_free: swap-space map bad (entry 00000a00) Sep 30 14:41:36 mgr2 kernel: swap_free: swap-space map bad (entry 00000800) Sep 30 14:41:36 mgr2 kernel: swap_free: swap-space map bad (entry 00000100) Sep 30 14:41:36 mgr2 kernel: swap_free: swap-space map bad (entry 00000800) Sep 30 14:41:36 mgr2 kernel: swap_free: swap-space map bad (entry 00000100) Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000900 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000800 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000500 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000800 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000800 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000c00 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000900 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000800 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000100 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000800 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000100 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000100 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000300 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000100 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000100 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000a00 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000100 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000800 Sep 30 14:41:36 mgr2 kernel: free_one_pmd: bad directory entry 00000100 (flo@ping)/tmp# ksymoops -k /dev/null -l /dev/null -m /tmp/System.map-2.2.17 -o /tmp </tmp/oops ksymoops 2.3.4 on i686 2.2.16. Options used -V (default) -k /dev/null (specified) -l /dev/null (specified) -o /tmp (specified) -m /tmp/System.map-2.2.17 (specified) Error (regular_file): read_ksyms /dev/null is not a regular file, ignored No modules in ksyms, skipping objects No ksyms, skipping lsmod Sep 30 14:41:36 mgr2 kernel: Unable to handle kernel NULL pointer dereference at virtual address 000005ed Sep 30 14:41:36 mgr2 kernel: current->tss.cr3 = 07aea000, %cr3 = 07aea000 Sep 30 14:41:36 mgr2 kernel: *pde = 00000000 Sep 30 14:41:36 mgr2 kernel: Oops: 0000 Sep 30 14:41:36 mgr2 kernel: CPU: 0 Sep 30 14:41:36 mgr2 kernel: EIP: 0010:[free_wait+49/116] Sep 30 14:41:36 mgr2 kernel: EFLAGS: 00010087 Sep 30 14:41:36 mgr2 kernel: eax: 00000006 ebx: c44bf160 ecx: 000005e9 edx: 000005e9 Sep 30 14:41:36 mgr2 kernel: esi: c44bf15c edi: c44bf000 ebp: 00000287 esp: c7a43eec Sep 30 14:41:36 mgr2 kernel: ds: 0018 es: 0018 ss: 0018 Sep 30 14:41:36 mgr2 kernel: Process named (pid: 141, process nr: 9, stackpage=c7a43000) Sep 30 14:41:36 mgr2 kernel: Stack: 00800000 00000018 00000004 00000000 00000000 c012e0ab c44bf000 00000000 Sep 30 14:41:36 mgr2 kernel: 00000018 c012e07c 00000001 00000004 c08f5438 00000000 00000001 c08f5438 Sep 30 14:41:36 mgr2 kernel: de826e24 c7a42000 c7a42000 00000000 00000000 c44bf000 00000009 c2ad7000 Sep 30 14:41:36 mgr2 kernel: Call Trace: [do_select+487/512] [do_select+440/512] [sys_select+881/1176] [sys_gettimeofday+32/148] [system_call+52/56] Sep 30 14:41:36 mgr2 kernel: Code: 8b 41 04 39 d8 74 09 89 c2 8b 42 04 39 d8 75 f7 89 4a 04 55 Using defaults from ksymoops -t elf32-i386 -a i386 Code; 00000000 Before first symbol 00000000 <_EIP>: Code; 00000000 Before first symbol 0: 8b 41 04 mov 0x4(%ecx),%eax Code; 00000003 Before first symbol 3: 39 d8 cmp %ebx,%eax Code; 00000005 Before first symbol 5: 74 09 je 10 <_EIP+0x10> 00000010 Before first symbol Code; 00000007 Before first symbol 7: 89 c2 mov %eax,%edx Code; 00000009 Before first symbol 9: 8b 42 04 mov 0x4(%edx),%eax Code; 0000000c Before first symbol c: 39 d8 cmp %ebx,%eax Code; 0000000e Before first symbol e: 75 f7 jne 7 <_EIP+0x7> 00000007 Before first symbol Code; 00000010 Before first symbol 10: 89 4a 04 mov %ecx,0x4(%edx) Code; 00000013 Before first symbol 13: 55 push %ebp 1 error issued. Results may not be reliable. You have new mail in /var/spool/mail/flo And directly afterwards: (flo@ping)/usr/src/linux# ksymoops -k /dev/null -l /dev/null -m /tmp/System.map-2.2.17 -o /tmp </tmp/oops2 ksymoops 2.3.4 on i686 2.2.16. Options used -V (default) -k /dev/null (specified) -l /dev/null (specified) -o /tmp (specified) -m /tmp/System.map-2.2.17 (specified) Error (regular_file): read_ksyms /dev/null is not a regular file, ignored No modules in ksyms, skipping objects No ksyms, skipping lsmod Sep 30 14:41:36 mgr2 kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000804 Sep 30 14:41:36 mgr2 kernel: current->tss.cr3 = 06ea4000, %cr3 = 06ea4000 Sep 30 14:41:36 mgr2 kernel: *pde = 00000000 Sep 30 14:41:36 mgr2 kernel: Oops: 0000 Sep 30 14:41:36 mgr2 kernel: CPU: 0 Sep 30 14:41:36 mgr2 kernel: EIP: 0010:[free_wait+16/116] Sep 30 14:41:36 mgr2 kernel: EFLAGS: 00010206 Sep 30 14:41:36 mgr2 kernel: eax: c0296608 ebx: 00000000 ecx: c01cf940 edx: c0262ec0 Sep 30 14:41:36 mgr2 kernel: esi: c468d10c edi: 00000800 ebp: 00000000 esp: c5d7deec Sep 30 14:41:36 mgr2 kernel: ds: 0018 es: 0018 ss: 0018 Sep 30 14:41:36 mgr2 kernel: Process usrd (pid: 30075, process nr: 63, stackpage=c5d7d000) Sep 30 14:41:36 mgr2 kernel: Stack: c60edbc0 00000000 00000000 00000000 00000000 c012e0ab c468d000 c0110528 Sep 30 14:41:36 mgr2 kernel: 00000000 c012e07c 00000000 00000000 c60edbc0 00000000 c2070900 00000001 Sep 30 14:41:36 mgr2 kernel: 08112be0 00000282 c5d7c000 00000000 00000000 c468d000 0000030a c011acf3 Sep 30 14:41:36 mgr2 kernel: Call Trace: [do_select+487/512] [process_timeout+0/20] [do_select+440/512] [handle_mm_fault+279/316] [sys_select+881/1176] [do_page_fault+263/992] [error_code+45/52] Sep 30 14:41:36 mgr2 kernel: Code: 8b 47 04 89 c6 c1 e6 04 03 77 08 85 c0 74 3b 90 ff 4f 04 83 Using defaults from ksymoops -t elf32-i386 -a i386 Code; 00000000 Before first symbol 00000000 <_EIP>: Code; 00000000 Before first symbol 0: 8b 47 04 mov 0x4(%edi),%eax Code; 00000003 Before first symbol 3: 89 c6 mov %eax,%esi Code; 00000005 Before first symbol 5: c1 e6 04 shl $0x4,%esi Code; 00000008 Before first symbol 8: 03 77 08 add 0x8(%edi),%esi Code; 0000000b Before first symbol b: 85 c0 test %eax,%eax Code; 0000000d Before first symbol d: 74 3b je 4a <_EIP+0x4a> 0000004a Before first symbol Code; 0000000f Before first symbol f: 90 nop Code; 00000010 Before first symbol 10: ff 4f 04 decl 0x4(%edi) Code; 00000013 Before first symbol 13: 83 00 00 addl $0x0,(%eax) 1 error issued. Results may not be reliable. Other suspicions ? Flo -- Florian Lohoff [EMAIL PROTECTED] +49-5201-669912 "Write only memory - Oops. Time for my medication again ..." - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/