On Fri, 22 Mar 2013, CAI Qian wrote: > Starting to see those on 3.8.4 (never saw in 3.8.2) stable kernel on a few systems > during LTP run, > > [11297.597242] BUG: unable to handle kernel paging request at 00000000fffffffe > [11297.598022] IP: [] kmem_cache_alloc+0x68/0x1e0 Is this repeatable? Do you have CONFIG_SLAB or CONFIG_SLUB enabled? > [11297.598022] PGD 7b9eb067 PUD 0 > [11297.598022] Oops: 0000 [#2] SMP > [11297.598022] Modules linked in: cmtp kernelcapi bnep scsi_transport_iscsi rfcomm l2tp_ppp l2tp_netlink l2tp_core hidp ipt_ULOG af_key nfc rds pppoe pppox ppp_generic slhc af_802154 atm ip6table_filter ip6_tables iptable_filter ip_tables btrfs zlib_deflate vfat fat nfs_layout_nfsv41_files nfsv4 auth_rpcgss nfsv3 nfs_acl nfsv2 nfs lockd sunrpc fscache nfnetlink_log nfnetlink bluetooth rfkill arc4 md4 nls_utf8 cifs dns_resolver nf_tproxy_core nls_koi8_u nls_cp932 ts_kmp sctp sg kvm_amd kvm virtio_balloon i2c_piix4 pcspkr xfs libcrc32c ata_generic pata_acpi cirrus drm_kms_helper ttm ata_piix virtio_net drm libata virtio_blk i2c_core floppy dm_mirror dm_region_hash dm_log dm_mod [last unloaded: ipt_REJECT] > [11297.598022] CPU 1 > [11297.598022] Pid: 14134, comm: ltp-pan Tainted: G D 3.8.4+ #1 Bochs Bochs > [11297.598022] RIP: 0010:[] [] kmem_cache_alloc+0x68/0x1e0 > [11297.598022] RSP: 0018:ffff8800447dbdd0 EFLAGS: 00010246 > [11297.598022] RAX: 0000000000000000 RBX: ffff88007c169970 RCX: 00000000018acdcd > [11297.598022] RDX: 000000000006c104 RSI: 00000000000080d0 RDI: ffff88007d04ac00 > [11297.598022] RBP: ffff8800447dbe10 R08: 0000000000017620 R09: ffffffff810fe2e2 > [11297.598022] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffffe > [11297.598022] R13: 00000000000080d0 R14: ffff88007d04ac00 R15: ffff88007d04ac00 > [11297.598022] FS: 00007f09c29b4740(0000) GS:ffff88007fd00000(0000) knlGS:00000000f74d86c0 > [11297.598022] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > [11297.598022] CR2: 00000000fffffffe CR3: 0000000037213000 CR4: 00000000000006e0 > [11297.598022] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [11297.598022] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > [11297.598022] Process ltp-pan (pid: 14134, threadinfo ffff8800447da000, task ffff8800551ab2e0) > [11297.598022] Stack: > [11297.598022] ffffffff810fe2e2 ffffffff8108cf0f 0000000001200011 ffff88007c169970 > [11297.598022] 0000000000000000 00007f09c29b4a10 0000000000000000 ffff88007c169970 > [11297.598022] ffff8800447dbe30 ffffffff810fe2e2 0000000000000000 0000000001200011 > [11297.598022] Call Trace: > [11297.598022] [] ? __delayacct_tsk_init+0x22/0x40 > [11297.598022] [] ? prepare_creds+0xdf/0x190 > [11297.598022] [] __delayacct_tsk_init+0x22/0x40 > [11297.598022] [] copy_process.part.25+0x31f/0x13f0 > [11297.598022] [] do_fork+0xa9/0x350 > [11297.598022] [] sys_clone+0x16/0x20 > [11297.598022] [] stub_clone+0x69/0x90 > [11297.598022] [] ? system_call_fastpath+0x16/0x1b > [11297.598022] Code: 90 4d 89 fe 4d 8b 06 65 4c 03 04 25 c8 db 00 00 49 8b 50 08 4d 8b 20 4d 85 e4 0f 84 2b 01 00 00 49 63 46 20 4d 8b 06 41 f6 c0 0f <49> 8b 1c 04 0f 85 55 01 00 00 48 8d 4a 01 4c 89 e0 65 49 0f c7 > [11297.598022] RIP [] kmem_cache_alloc+0x68/0x1e0 > [11297.598022] RSP > [11297.598022] CR2: 00000000fffffffe > [11297.727799] ---[ end trace 037bde72f23b34d2 ]--- > > Never saw this in mainline but only something like this wondering could be related > (that kmem_cache_alloc also in the trace). > These are unrelated. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>