Messages in this thread | | | Date | Thu, 28 Apr 2005 17:14:16 +0530 | From | Vivek Goyal <> | Subject | Re: [Fastboot] Re: Kdump Testing |
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On Wed, Apr 27, 2005 at 12:23:12PM -0700, Randy.Dunlap wrote: > On Tue, 26 Apr 2005 14:24:48 +0530 > Vivek Goyal <vgoyal@in.ibm.com> wrote: > > > > > > > 2.6.12-rc2-mm3 reboots vmlinux-recover-UP on panic. > > > (vmlinux-recover-SMP hangs during [early] reboot, but -UP > > > goes further....) > > > > > > (BTW, how does I do serial console from the second > > > kernel...? It has the drivers, but not the command > > > line info? TBD.) > > > > > > > > > While pre-loading the capture kernel using kexec, you can specify the command > > line options to second kernel using --append="". You must already be passing > > the root device. Add you serial console parameters as well something like > > --append="console=ttyS0, 38400" > > > > > > > vmlinux-recover-UP gets to this point, hand-written, > > > several lines missing: > > > > > > kfree_debugcheck: bad ptr c3dbffb0h. ( == %esi) > > > kernel BUG at <bad filename>:23128! > > > invalid operand: 0000 [#1] > > > DEBUG_PAGEALLOC > > > EIP is at kfree_debugcheck+0x45/0x50 > > > > > > Stack dump shows lots of ext3 cache and inode functions... > > > > > > > Can you post a full serial console output of second kernel? That would help. > > I did another test run, same kernels (both running and recovery). > The recovery kernel got a little further this time, still had > Badness and a BUG. > > ---
Ok. I am also able to see this slab corruption occurring on my machine. I can get away with the problem if I disable cachefs support.
Infact, I can reproduce the problem if I boot capture kernel normally through BIOS with commandline "mem=64M". Looks like it is generic problem and not associated with kexec/kdump. Cachefs might be doing some corruption.
> CacheFS: Wrong magic number on cache > EXT3-fs: INFO: recovery required on readonly filesystem. > EXT3-fs: write access will be enabled during recovery. > input: ImPS/2 Generic Wheel Mouse on isa0060/serio1 > kjournald starting. Commit interval 5 seconds > EXT3-fs: recovery complete. > EXT3-fs: mounted filesystem with ordered data mode. > VFS: Mounted root (ext3 filesystem) readonly. > Freeing unused kernel memory: 220k freed > Adding 2104472k swap on /dev/hda7. Priority:42 extents:1 > mismatch in kmem_cache_free: expected cache c168fc80, got c4daca80 > c4daca80 is ext3_inode_cache. > c168fc80 is skbuff_head_cache. > Badness in cache_free_debugcheck at mm/slab.c:1917 > [<c1003368>] dump_stack+0x16/0x18 > [<c1041a94>] cache_free_debugcheck+0x88/0x1d5 > [<c10424fd>] kmem_cache_free+0x26/0x65 > [<c10a8c01>] ext3_destroy_inode+0x17/0x19 > [<c10784c9>] destroy_inode+0x27/0x3d > [<c1078837>] dispose_list+0x60/0x178 > [<c1078f81>] prune_icache+0x363/0x399 > [<c1078fd0>] shrink_icache_memory+0x19/0x32 > [<c1044dd7>] shrink_slab+0x104/0x172 > [<c104641e>] try_to_free_pages+0xbe/0x16f > [<c103d9a0>] __alloc_pages+0x1d3/0x393 > [<c104037c>] kmem_getpages+0x2d/0x7f > [<c1041869>] cache_grow+0x155/0x2a8 > [<c1041f1f>] cache_alloc_refill+0x285/0x2c2 > [<c10423c6>] kmem_cache_alloc+0x5d/0x77 > [<c1075dac>] d_alloc+0x16/0x27a > [<c106b2b9>] real_lookup+0x40/0xc2 > [<c106b68e>] do_lookup+0x41/0x75 > [<c106c3a7>] __link_path_walk+0xce5/0x1066 > [<c106c768>] link_path_walk+0x40/0xc7 > [<c106ca87>] path_lookup+0xec/0xf7 > [<c106cbc9>] __user_walk+0x28/0x42 > [<c10667b3>] vfs_lstat+0x17/0x3f > [<c1066d1e>] sys_lstat64+0x13/0x29 > [<c1002c5f>] sysenter_past_esp+0x54/0x75 > slab error in cache_free_debugcheck(): cache `ext3_inode_cache': double free, or memory outside object was overwritten > [<c1003368>] dump_stack+0x16/0x18 > [<c1041ad2>] cache_free_debugcheck+0xc6/0x1d5 > [<c10424fd>] kmem_cache_free+0x26/0x65 > [<c10a8c01>] ext3_destroy_inode+0x17/0x19 > [<c10784c9>] destroy_inode+0x27/0x3d > [<c1078837>] dispose_list+0x60/0x178 > [<c1078f81>] prune_icache+0x363/0x399 > [<c1078fd0>] shrink_icache_memory+0x19/0x32 > [<c1044dd7>] shrink_slab+0x104/0x172 > [<c104641e>] try_to_free_pages+0xbe/0x16f > [<c103d9a0>] __alloc_pages+0x1d3/0x393 > [<c104037c>] kmem_getpages+0x2d/0x7f > [<c1041869>] cache_grow+0x155/0x2a8 > [<c1041f1f>] cache_alloc_refill+0x285/0x2c2 > [<c10423c6>] kmem_cache_alloc+0x5d/0x77 > [<c1075dac>] d_alloc+0x16/0x27a > [<c106b2b9>] real_lookup+0x40/0xc2 > [<c106b68e>] do_lookup+0x41/0x75 > [<c106c3a7>] __link_path_walk+0xce5/0x1066 > [<c106c768>] link_path_walk+0x40/0xc7 > [<c106ca87>] path_lookup+0xec/0xf7 > [<c106cbc9>] __user_walk+0x28/0x42 > [<c10667b3>] vfs_lstat+0x17/0x3f > [<c1066d1e>] sys_lstat64+0x13/0x29 > [<c1002c5f>] sysenter_past_esp+0x54/0x75 > c3d7afb0: redzone 1: 0x0, redzone 2: 0x0. > ------------[ cut here ]------------ > kernel BUG at <bad filename>:18422! > invalid operand: 0000 [#1] > DEBUG_PAGEALLOC > Modules linked in: > CPU: 0 > EIP: 0060:[<c1041b46>] Not tainted VLI > EFLAGS: 00010002 (2.6.12-rc2-mm3) > EIP is at cache_free_debugcheck+0x13a/0x1d5 > eax: c3d7a000 ebx: c3d7a000 ecx: 00001000 edx: 00000fb0 > esi: c3d7afb0 edi: c4daca80 ebp: c2f73bb8 esp: c2f73bac > ds: 007b es: 007b ss: 0068 > Process showconsole (pid: 1264, threadinfo=c2f72000 task=c2f68ac0) > Stack: c4d0fec4 c4daca80 c3d7bd44 c2f73be0 c10424fd c4daca80 c3d7bd44 c10a8c01 > 00000080 00000286 c3d7bddc c2f73c2c 00000080 c2f73bf0 c10a8c01 c4daca80 > c3d7bd44 c2f73c00 c10784c9 c3d7bddc c3d7bddc c2f73c1c c1078837 c3d7bddc > Call Trace: > [<c100334a>] show_stack+0x7a/0x82 > [<c1003453>] show_registers+0xe9/0x153 > [<c100369f>] die+0x15c/0x23d > [<c1003a79>] do_invalid_op+0x90/0x97 > [<c1002ed3>] error_code+0x4f/0x54 > [<c10424fd>] kmem_cache_free+0x26/0x65 > [<c10a8c01>] ext3_destroy_inode+0x17/0x19 > [<c10784c9>] destroy_inode+0x27/0x3d > [<c1078837>] dispose_list+0x60/0x178 > [<c1078f81>] prune_icache+0x363/0x399 > [<c1078fd0>] shrink_icache_memory+0x19/0x32 > [<c1044dd7>] shrink_slab+0x104/0x172 > [<c104641e>] try_to_free_pages+0xbe/0x16f > [<c103d9a0>] __alloc_pages+0x1d3/0x393 > [<c104037c>] kmem_getpages+0x2d/0x7f > [<c1041869>] cache_grow+0x155/0x2a8 > [<c1041f1f>] cache_alloc_refill+0x285/0x2c2 > [<c10423c6>] kmem_cache_alloc+0x5d/0x77 > [<c1075dac>] d_alloc+0x16/0x27a > [<c106b2b9>] real_lookup+0x40/0xc2 > [<c106b68e>] do_lookup+0x41/0x75 > [<c106c3a7>] __link_path_walk+0xce5/0x1066 > [<c106c768>] link_path_walk+0x40/0xc7 > [<c106ca87>] path_lookup+0xec/0xf7 > [<c106cbc9>] __user_walk+0x28/0x42 > [<c10667b3>] vfs_lstat+0x17/0x3f > [<c1066d1e>] sys_lstat64+0x13/0x29 > [<c1002c5f>] sysenter_past_esp+0x54/0x75 > Code: e8 bc e4 ff ff 8b 55 10 89 10 58 5a 8b 5b 0c 89 f0 31 d2 8b 4f 34 29 d8 f7 f1 3b 47 3c 72 02 0f 0b 0f af c1 8d 04 18 39 c6 74 02 <0f> 0b f6 47 39 02 74 15 6a 05 57 57 e8 1d e4 ff ff 8d 04 30 89 > - 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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