While executing LTP Controller tests(memcg regression) on a POWER6 box came across this following OOPS. Memory cgroup out of memory: kill process 9139 (memcg_test_1) score 3 or a child Killed process 9139 (memcg_test_1) vsz:3456kB, anon-rss:448kB, file-rss:1088kB Memory cgroup out of memory: kill process 9140 (memcg_test_1) score 3 or a child Killed process 9140 (memcg_test_1) vsz:3456kB, anon-rss:448kB, file-rss:1088kB Unable to handle kernel paging request for data at address 0x720072007200720 Faulting instruction address: 0xc00000000015b778 Oops: Kernel access of bad area, sig: 11 [#2] SMP NR_CPUS=1024 NUMA pSeries last sysfs file: /sys/devices/system/cpu/cpu1/cache/index1/shared_cpu_map Modules linked in: quota_v2 quota_tree ipv6 fuse loop dm_mod sr_mod cdrom sg sd_mod crc_t10dif ibmvscsic scsi_transport_srp scsi_tgt scsi_mod NIP: c00000000015b778 LR: c00000000015b740 CTR: 0000000000000000 REGS: c000000009812ff0 TRAP: 0300 Tainted: G D (2.6.35-rc2-autotest) MSR: 8000000000009032 <EE,ME,IR,DR> CR: 44004424 XER: 00000001 DAR: 0720072007200720, DSISR: 0000000040000000 TASK = c000000005fb1100[9155] 'umount' THREAD: c000000009810000 CPU: 0 GPR00: 0000000000000000 c000000009813270 c000000000d3d7a0 0000000000000000 GPR04: 0000000000008050 0000000000160000 0000000000000027 c00000000f2c6870 GPR08: 00000000000006a5 c000000000b16870 c000000000cf0140 000000000e7b0000 GPR12: 0000000024004428 c000000007440000 0000000000008000 fffffffffffff000 GPR16: 0000000000000000 c0000000098138f0 000000000000002d 0000000000000027 GPR20: 0000000000000000 0000000000000027 0000000000000000 c000000007063138 GPR24: ffffffffffffffff 0000000000000000 c00000000019bafc c00000000e02e000 GPR28: 0000000000000001 0000000000008050 c000000000ca6b00 0720072007200720 NIP [c00000000015b778] .kmem_cache_alloc+0xb0/0x13c LR [c00000000015b740] .kmem_cache_alloc+0x78/0x13c Call Trace: [c000000009813270] [c00000000015b740] .kmem_cache_alloc+0x78/0x13c (unreliable) [c000000009813310] [c00000000019bafc] .alloc_buffer_head+0x2c/0x78 [c000000009813390] [c00000000019c99c] .alloc_page_buffers+0x60/0x114 [c000000009813450] [c00000000019ca78] .create_empty_buffers+0x28/0x140 [c0000000098134e0] [c00000000019f2ec] .__block_prepare_write+0xe4/0x4f0 [c000000009813610] [c00000000019f94c] .block_write_begin_newtrunc+0xa8/0x120 [c0000000098136d0] [c00000000019fea0] .block_write_begin+0x34/0x8c [c000000009813770] [c00000000022b458] .ext3_write_begin+0x13c/0x298 [c000000009813880] [c000000000117500] .generic_file_buffered_write+0x13c/0x320 [c0000000098139b0] [c000000000119c80] .__generic_file_aio_write+0x378/0x3dc [c000000009813ab0] [c000000000119d68] .generic_file_aio_write+0x84/0xfc [c000000009813b60] [c00000000016e460] .do_sync_write+0xac/0x10c [c000000009813ce0] [c00000000016f204] .vfs_write+0xd0/0x1dc [c000000009813d80] [c00000000016f418] .SyS_write+0x58/0xa0 [c000000009813e30] [c0000000000085b4] syscall_exit+0x0/0x40 Instruction dump: 38600000 409e0090 38000000 8b8d0212 980d0212 e96d0040 e93b0000 7ce95a14 7fe9582a 2fbf0000 419e0014 e81b001a <7c1f002a> 7c09592a 4800001c 7f46d378 ---[ end trace f24cb0cb5729d2bb ]--- And few more of these. Previous snapshot release 2.6.35-rc1-git5(6c5de280b6...) was good. Thanks -Sachin -- --------------------------------- Sachin Sant IBM Linux Technology Center India Systems and Technology Labs Bangalore, India --------------------------------- -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>