Messages in this thread | | | Date | Wed, 16 Feb 2005 12:07:52 +1100 | From | Erik de Castro Lopo <> | Subject | 2.6.10 : kernel BUG at mm/rmap.c:483! |
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Hi all,
I'm running a kernel compiled from pristine 2.6.10 sources downloaded from kernel.org on a P4 with HT. I was originally working on an SMP/CONFIG_PREEMPT kernel when I first hit this problem. I downgraded to an SMP kernel without CONFIG_PREEMPT the problem remained. Same problem on a kernel compiled for a single CPU. The dmesg output below is for the single CPU, no CONFIG_PREEMPT case.
The problem is triggered by a user space application which mmaps memory space on a custom PCI card via /dev/mem, reads some data and munmaps it. The program works perfectly on a 2.4.26 kernel. On 2.6.10 I get this on the console:
------------[ cut here ]------------ kernel BUG at mm/rmap.c:483! invalid operand: 0000 [#1] Modules linked in: CPU: 0 EIP: 0060:[<c013b5b6>] Not tainted VLI EFLAGS: 00010286 (2.6.10) EIP is at page_remove_rmap+0x26/0x40 eax: ffffffff ebx: 00003000 ecx: b5e86000 edx: c1000060 esi: dabd9a24 edi: c1000060 ebp: 0017a000 esp: da40febc ds: 007b es: 007b ss: 0068 Process counters-erikd (pid: 1622, threadinfo=da40e000 task=da9d6a60) Stack: c0135a38 dfd0f878 00000002 f277a8c0 00000000 00003027 b5e86000 c049e480 b6286000 da43eb60 b6000000 c049e480 c0135b9b 0017a000 00000000 de16f030 dfc82000 b5e86000 da43eb60 b6286000 c049e480 c0135bfd 00400000 00000000 Call Trace: [<c0135a38>] zap_pte_range+0x138/0x250 [<c0135b9b>] zap_pmd_range+0x4b/0x70 [<c0135bfd>] unmap_page_range+0x3d/0x70 [<c0135d2e>] unmap_vmas+0xfe/0x1b0 [<c013955a>] unmap_region+0x6a/0xd0 [<c01397f4>] do_munmap+0xf4/0x130 [<c0139870>] sys_munmap+0x40/0x70 [<c01022f3>] syscall_call+0x7/0xb Code: 90 8d 74 26 00 89 c2 8b 00 f6 c4 08 75 27 83 42 08 ff 0f 98 c0 84 c0 74 11 8b 42 08 40 78 0c 9c 58 fa ff 0d 50 65 4a c0 50 9d c3 <0f> 0b e3 01 41 2c 38 c0 eb ea 0f 0b e0 01 41 2c 38 c0 eb cf 8d Is there anything I have missed? Does /dev/mem on a 2.6 kerel behave the same way as on a 2.4 kernel?
I can supply more info if needed.
Regards, Erik -- ------------------------------------------------------- [N] Erik de Castro Lopo, Senior Computer Engineer [E] erik.de.castro.lopo@sensorynetworks.com [W] http://www.sensorynetworks.com [T] +61 2 83022726 [F] +61 2 94750316 [A] L6/140 William St, East Sydney NSW 2011, Australia ------------------------------------------------------- A good debugger is no substitute for a good test suite. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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