Hi,
My servers are running 2.6.21 (oficial source code) since today and i can see an error in syslog : May 2 16:41:27 zz11 kernel: kernel BUG at mm/rmap.c:596! May 2 16:41:27 zz11 kernel: invalid opcode: 0000 [#1] May 2 16:41:27 zz11 kernel: SMP May 2 16:41:27 zz11 kernel: Modules linked in: May 2 16:41:27 zz11 kernel: CPU: 2May 2 16:41:27 zz11 kernel: CPU: 2 May 2 16:41:27 zz11 kernel: EIP: 0060:[<c0144e85>] Not tainted VLI May 2 16:41:27 zz11 kernel: EFLAGS: 00010246 (2.6.21.1-dh1 #7) May 2 16:41:27 zz11 kernel: EIP is at page_remove_rmap+0xce/0xed May 2 16:41:27 zz11 kernel: eax: 00000000 ebx: c1052b40 ecx: c0560f70 edx: 00000082 May 2 16:41:27 zz11 kernel: esi: f7270764 edi: 00000020 ebp: c7594378 esp: eafc3df8 May 2 16:41:27 zz11 kernel: ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068 May 2 16:41:27 zz11 kernel: Process Mailscanner (pid: 5909, ti=eafc2000 task=eed33570 task.ti=eafc2000) May 2 16:41:27 zz11 kernel: Stack: c04dceab f7728a18 c1052b40 08cde000 c013fb98 00000000 f7270764 eafc3e70 May 2 16:41:27 zz11 kernel: 00000000 00000001 09000000 c4f8008c f52ac900 c18160e0 ffffff6a ffffffff May 2 16:41:27 zz11 kernel: c10eb28c c4f8008c 00369000 09d93000 00000000 eafc3e70 f43cd4c4 f52ac900 May 2 16:41:27 zz11 kernel: Call Trace: How can i solve it? is it a documented bug? Hardware details: # free -m total used free shared buffers cached Mem: 1009 956 52 0 98 396 -/+ buffers/cache: 462 547 Swap: 0 0 0 /proc/cpuinfo (4 Xeon procesor ) vendor_id : GenuineIntel cpu family : 15 model : 2 model name : Intel(R) Xeon(TM) CPU 2.80GHz flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid xtpr bogomips : 5600.87 Filesystems: ext3 and reiserfs ( 3.x) ALL BUG message: May 2 16:41:27 zz11 kernel: Eeek! page_mapcount(page) went negative! (-1) May 2 16:41:27 zz11 kernel: page pfn = 295a May 2 16:41:27 zz11 kernel: page->flags = 40000834 May 2 16:41:27 zz11 kernel: page->count = 2 May 2 16:41:27 zz11 kernel: page->mapping = f7728a18 May 2 16:41:27 zz11 kernel: vma->vm_ops = _stext+0x3fefff40/0x14 May 2 16:41:27 zz11 kernel: ------------[ cut here ]------------ May 2 16:41:27 zz11 kernel: kernel BUG at mm/rmap.c:596! May 2 16:41:27 zz11 kernel: invalid opcode: 0000 [#1] May 2 16:41:27 zz11 kernel: SMP May 2 16:41:27 zz11 kernel: Modules linked in: May 2 16:41:27 zz11 kernel: CPU: 2 May 2 16:41:27 zz11 kernel: EIP: 0060:[<c0144e85>] Not tainted VLI May 2 16:41:27 zz11 kernel: EFLAGS: 00010246 (2.6.21.1-dh1 #7) May 2 16:41:27 zz11 kernel: EIP is at page_remove_rmap+0xce/0xed May 2 16:41:27 zz11 kernel: eax: 00000000 ebx: c1052b40 ecx: c0560f70 edx: 00000082 May 2 16:41:27 zz11 kernel: esi: f7270764 edi: 00000020 ebp: c7594378 esp: eafc3df8 May 2 16:41:27 zz11 kernel: ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068 May 2 16:41:27 zz11 kernel: Process Postfix (pid: 5909, ti=eafc2000 task=eed33570 task.ti=eafc2000) May 2 16:41:27 zz11 kernel: Stack: c04dceab f7728a18 c1052b40 08cde000 c013fb98 00000000 f7270764 eafc3e70 May 2 16:41:27 zz11 kernel: 00000000 00000001 09000000 c4f8008c f52ac900 c18160e0 ffffff6a ffffffff May 2 16:41:27 zz11 kernel: c10eb28c c4f8008c 00369000 09d93000 00000000 eafc3e70 f43cd4c4 f52ac900 May 2 16:41:27 zz11 kernel: Call Trace: May 2 16:41:27 zz11 kernel: [<c013fb98>] unmap_vmas+0x25d/0x4a9 May 2 16:41:27 zz11 kernel: [<c014255a>] exit_mmap+0x75/0xe1 May 2 16:41:27 zz11 kernel: [<c01161e9>] mmput+0x20/0x75 May 2 16:41:27 zz11 kernel: [<c011a64f>] do_exit+0x1a1/0x693 May 2 16:41:27 zz11 kernel: [<c011abad>] sys_exit_group+0x0/0xd May 2 16:41:27 zz11 kernel: [<c0121973>] get_signal_to_deliver+0x366/0x389 May 2 16:41:27 zz11 kernel: [<c0110bde>] do_page_fault+0x0/0x512 May 2 16:41:27 zz11 kernel: [<c0101ccd>] do_notify_resume+0x84/0x5c9 May 2 16:41:27 zz11 kernel: [<c01409d4>] __handle_mm_fault+0x754/0x7a4 May 2 16:41:27 zz11 kernel: [<c011eb25>] run_timer_softirq+0x36/0x15b May 2 16:41:27 zz11 kernel: [<c01110e6>] do_page_fault+0x508/0x512 May 2 16:41:27 zz11 kernel: [<c0110bde>] do_page_fault+0x0/0x512 May 2 16:41:27 zz11 kernel: [<c0102606>] work_notifysig+0x13/0x19 May 2 16:41:27 zz11 kernel: [<c0450000>] one_sock_name+0x67/0xa3 May 2 16:41:27 zz11 kernel: ======================= May 2 16:41:27 zz11 kernel: Code: c0 74 0d 8b 50 08 b8 db ce 4d c0 e8 e7 cd fe ff 8b 46 48 85 c0 74 14 8b 40 10 85 c0 74 0d 8b 50 2c b8 fa ce 4d c0 e8 cc cd fe ff <0f> 0b eb fe 8b 53 10 89 d8 59 5b 5b 5e 83 e2 01 f7 da 83 c2 04 May 2 16:41:27 zz11 kernel: EIP: [<c0144e85>] page_remove_rmap+0xce/0xed SS:ESP 0068:eafc3df8 May 2 16:41:27 zz11 kernel: Fixing recursive fault but reboot is needed! - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/