On Tue, Oct 30, 2012 at 02:29:25PM +0800, Zhouping Liu wrote: > On 10/29/2012 01:56 AM, Johannes Weiner wrote: > >On Fri, Oct 26, 2012 at 11:08:00AM +0200, Peter Zijlstra wrote: > >>On Fri, 2012-10-26 at 17:07 +0800, Zhouping Liu wrote: > >>>[ 180.918591] RIP: 0010:[<ffffffff8118c39a>] [<ffffffff8118c39a>] mem_cgroup_prepare_migration+0xba/0xd0 > >>>[ 182.681450] [<ffffffff81183b60>] do_huge_pmd_numa_page+0x180/0x500 > >>>[ 182.775090] [<ffffffff811585c9>] handle_mm_fault+0x1e9/0x360 > >>>[ 182.863038] [<ffffffff81632b62>] __do_page_fault+0x172/0x4e0 > >>>[ 182.950574] [<ffffffff8101c283>] ? __switch_to_xtra+0x163/0x1a0 > >>>[ 183.041512] [<ffffffff8101281e>] ? __switch_to+0x3ce/0x4a0 > >>>[ 183.126832] [<ffffffff8162d686>] ? __schedule+0x3c6/0x7a0 > >>>[ 183.211216] [<ffffffff81632ede>] do_page_fault+0xe/0x10 > >>>[ 183.293705] [<ffffffff8162f518>] page_fault+0x28/0x30 > >>Johannes, this looks like the thp migration memcg hookery gone bad, > >>could you have a look at this? > >Oops. Here is an incremental fix, feel free to fold it into #31. > Hello Johannes, > > maybe I don't think the below patch completely fix this issue, as I > found a new error(maybe similar with this): > > [88099.923724] ------------[ cut here ]------------ > [88099.924036] kernel BUG at mm/memcontrol.c:1134! > [88099.924036] invalid opcode: 0000 [#1] SMP > [88099.924036] Modules linked in: lockd sunrpc kvm_amd kvm > amd64_edac_mod edac_core ses enclosure serio_raw bnx2 pcspkr shpchp > joydev i2c_piix4 edac_mce_amd k8temp dcdbas ata_generic pata_acpi > megaraid_sas pata_serverworks usb_storage radeon i2c_algo_bit > drm_kms_helper ttm drm i2c_core > [88099.924036] CPU 7 > [88099.924036] Pid: 3441, comm: stress Not tainted 3.7.0-rc2Jons+ #3 > Dell Inc. PowerEdge 6950/0WN213 > [88099.924036] RIP: 0010:[<ffffffff81188e97>] [<ffffffff81188e97>] > mem_cgroup_update_lru_size+0x27/0x30 Thanks a lot for your testing efforts, I really appreciate it. I'm looking into it, but I don't expect power to get back for several days where I live, so it's hard to reproduce it locally. But that looks like an LRU accounting imbalance that I wasn't able to tie to this patch yet. Do you see weird numbers for the lru counters in /proc/vmstat even without this memory cgroup patch? Ccing Hugh as well. Thanks, Johannes -- 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>