Which kernel version is this? Line 1193 in upstream is not in the function new_slab(). If this is the BUG_ON in new_slab() then we have an issue with illegal flags being passed to kmem_cache_alloc(). On Fri, 1 Apr 2011, Johannes Hirte wrote: > When I tried to create squashfs image my system suprised me with a > > ------------[ cut here ]------------ > kernel BUG at mm/slub.c:1193! > invalid opcode: 0000 [#1] SMP > last sysfs file: /sys/devices/virtual/block/loop0/uevent > CPU 1 > Modules linked in: ext4 mbcache jbd2 crc16 snd_seq_midi snd_emu10k1_synth > snd_emux_synth snd_seq_virmidi snd_seq_midi_emul snd_seq_oss > snd_seq_midi_event snd_seq snd_pcm_oss snd_mixer_oss snd_emu10k1 snd_rawmidi > snd_ac97_codec ac97_bus snd_pcm snd_seq_device snd_timer snd_page_alloc > snd_util_mem snd_hwdep snd sg ohci_hcd sr_mod 3w_xxxx uhci_hcd sata_sil > i2c_amd756 i2c_amd8111 amd64_edac_mod edac_core k8temp hwmon edac_mce_amd > > Pid: 7298, comm: mksquashfs Tainted: G W 2.6.38.1 #1 To Be Filled By > O.E.M. To Be Filled By O.E.M./TYAN Tiger K8W Dual AMD Opteron, S2875 > RIP: 0010:[<ffffffff81098ebb>] [<ffffffff81098ebb>] new_slab+0x16/0x20e > RSP: 0000:ffff8800068bd688 EFLAGS: 00010202 > RAX: 0000000000000000 RBX: ffff8800bb30c6c0 RCX: ffff8800068bd6d0 > RDX: 00000000ffffffff RSI: 000000000002011a RDI: ffff8800bb30c6c0 > RBP: ffff8800bb30c6c0 R08: ffff8800bfc97fe8 R09: 0000000000000000 > R10: dead000000200200 R11: dead000000100100 R12: 00000000ffffffff > R13: 0000000000000010 R14: 00000000ffffffff R15: ffff8800068bd6d0 > FS: 00007f3b6bf06700(0000) GS:ffff8800bfc80000(0000) knlGS:00000000f760fb40 > CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > CR2: 0000000002d8b84f CR3: 000000000689a000 CR4: 00000000000006e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > Process mksquashfs (pid: 7298, threadinfo ffff8800068bc000, task ffff8800bc25a6f0) > Stack: > ffff8800bb30c6c0 000000000002011a 00000000ffffffff 0000000000000010 > 0000000000000003 ffffffff81099287 0000000000000000 ffffffff811cac77 > ffff8800b992c038 0000000000000000 ffff8800bb30c6c0 ffff8800bb30c6c0 > Call Trace: > [<ffffffff81099287>] ? __slab_alloc+0x1d4/0x2ba > [<ffffffff811cac77>] ? alloc_extent_state+0x12/0x55 > [<ffffffff811cac77>] ? alloc_extent_state+0x12/0x55 > [<ffffffff810995e6>] ? kmem_cache_alloc+0x5a/0x86 > [<ffffffff811cac77>] ? alloc_extent_state+0x12/0x55 > [<ffffffff811cb6cf>] ? clear_extent_bit+0x92/0x31d > [<ffffffff811ce572>] ? try_release_extent_state+0x74/0x84 > [<ffffffff811ac624>] ? btree_releasepage+0x3e/0x76 > [<ffffffff81073939>] ? shrink_page_list+0x32d/0x4d6 > [<ffffffff81073ec4>] ? shrink_inactive_list+0x1d4/0x2ab > [<ffffffff8102ae1e>] ? enqueue_task_fair+0x14a/0x167 > [<ffffffff8107450a>] ? shrink_zone+0x2ec/0x3da > [<ffffffff81074924>] ? try_to_free_pages+0xf6/0x2f2 > [<ffffffff8106f0ec>] ? __alloc_pages_nodemask+0x4b2/0x71a > [<ffffffff810706aa>] ? __do_page_cache_readahead+0x96/0x1b5 > [<ffffffff81070a8e>] ? ra_submit+0x1c/0x23 > [<ffffffff81070cba>] ? page_cache_async_readahead+0x7b/0xaa > [<ffffffff81068d8f>] ? find_get_page+0x18/0x69 > [<ffffffff81069fc3>] ? generic_file_aio_read+0x2a0/0x5b0 > [<ffffffff8118d791>] ? xfs_file_aio_read+0x1b3/0x209 > [<ffffffff8107faf1>] ? handle_pte_fault+0x23f/0x665 > [<ffffffff810a08ab>] ? do_sync_read+0xb1/0xea > [<ffffffff810801d6>] ? handle_mm_fault+0x1dd/0x24c > [<ffffffff81225846>] ? __percpu_counter_add+0x30/0x4f > [<ffffffff81084ba4>] ? do_brk+0x278/0x2cb > [<ffffffff810a0eb4>] ? vfs_read+0xac/0x126 > [<ffffffff810a0f73>] ? sys_read+0x45/0x6e > [<ffffffff81001f3b>] ? system_call_fastpath+0x16/0x1b > Code: c0 74 0b 48 83 c4 08 48 89 ef 5b 5d ff e0 48 83 c4 08 5b 5d c3 41 56 f7 > c6 06 00 80 ff 41 89 d6 41 55 41 54 55 48 89 fd 53 74 02 <0f> 0b 41 89 f4 4c 8b > 6f 20 41 81 e4 f0 1e 07 00 44 0b 67 38 4c > RIP [<ffffffff81098ebb>] new_slab+0x16/0x20e > RSP <ffff8800068bd688> > ---[ end trace 56d1588e41a62ee3 ]--- > > The system was idle except for the mksquashfs process. If more infos are > needed please tell me. > > regards, > Johannes > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majordomo@xxxxxxxxxx For more info on Linux MM, > see: http://www.linux-mm.org/ . > Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ > Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a> > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>