Re: [PATCH 00/31] numa/core patches

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 10/31/2012 03:26 PM, Hugh Dickins wrote:
On Tue, 30 Oct 2012, Johannes Weiner wrote:

[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.
Sorry, I didn't get very far with it tonight.

Almost certain to be a page which was added to lru while it looked like
a 4k page, but taken off lru as a 2M page: we are taking a 2M page off
lru here, it's likely to be the page in question, but not necessarily.

There's quite a few put_page()s in do_huge_pmd_numa_page(), and it
would help if we could focus on the one which is giving the trouble,
but I don't know which that is.  Zhouping, if you can, please would
you do an "objdump -ld vmlinux >bigfile" of your kernel, then extract
from bigfile just the lines from "<do_huge_pmd_numa_page>:" to whatever
is the next function, and post or mail privately just that disassembly.
That should be good to identify which of the put_page()s is involved.

Hugh, I didn't find the next function, as I can't find any words that matched "do_huge_pmd_numa_page". is there any other methods? also I tried to use kdump to dump vmcore file, but unluckily kdump didn't work well, if you think it useful to dump vmcore file, I can try it again and provide more info.

Thanks,
Zhouping

--
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>


[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Bugtraq]     [Linux]     [Linux OMAP]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]