Re: aufs_migratepage:803...This operation is not supported

2015-10-07 Thread sfjro 

Hello B Buhlig,

Your mail wasn't delivered to me, but I've just found it in the archive
on SourceForge. I don't know why it was not delivered but I remember
such accident has ever happened several times.


B Buhlig:
> For my mythtv backend, I followed the below instructions at
> http://zackreed.me/articles/90-ubuntu-14-04-with-4-0-4-kernel-and-latest-aufs-from-source
>  to setup AUFS on Ubuntu 14.04 with a 4.0.4 kernel, with the notify option
> and NFS exports, however had been noticing periodic  hangs and crashes
> which seems related to the below messages scrolling in my syslog.
>
> 
> Sep 28 08:31:14 ubuntu1 kernel: [169791.090397] aufs
> aufs_migratepage:803:mythcommflag[26309]: This operation is not supported.
> Please report this application to aufs-users ML.
:::

Are you using NUMA system?
If so, I don't have such expensive system and cannot reproduce nor test.
Actually this message is a kind of hook to debug, and I don't expect
that users will see the message.
Anyway it must be a problem of aufs'. Currently I don't have a good
solution to address it except one. I'd suggest you to try disable
CONFIG_AUFS_DEBUG. It will set ->migragepage() pointer to NULL, so the
message won't appear. But I have to tell you one thing. I don't have
tested aufs with such configuration and NUMA systems, so I am unsure
disabling CONFIG_AUFS_DEBUG will solve your problem. It is just a
hope/guess/suggestion (sorry I don't know correct English word). I'd ask
you to test with disabling CONFIG_AUFS_DEBUG if you can.


J. R. Okajima

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aufs_migratepage:803...This operation is not supported

2015-09-28 Thread B Buhlig 

   For   my   mythtv  backend,  I  followed  the  below  instructions  at
   [1]http://zackreed.me/articles/90-ubuntu-14-04-with-4-0-4-kernel-and-latest-
   aufs-from-source
   Â to setup AUFS on Ubuntu 14.04 with a 4.0.4 kernel, with the notify option
   and NFS exports, however had been noticing periodic  hangs and crashes
   which seems related to the below messages scrolling in my syslog. Â
   
   Sep2808:31:14ubuntu1kernel:[169791.090397]aufs
   aufs_migratepage:803:mythcommflag[26309]: This operation is not supported.
   Please report this application to aufs-users ML.
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090403] CPU: 0 PID: 26309 Comm:
   mythcommflag Tainted: G Â  Â  Â  Â  Â  OE Â  4.0.4-aufs #1
   Sep  28 08:31:14 ubuntu1 kernel: [169791.090405] Hardware name: System
   manufacturer System Product Name/M5A78L-M/USB3, BIOS 1801 Â  Â 11/12/2013
   Sep  28  08:31:14  ubuntu1  kernel: [169791.090407] Â ea0d8fc0
   8800034ff940 817b4749 0001
   Sep  28  08:31:14  ubuntu1  kernel: [169791.090410] Â ea00022d2740
   8800034ff950 c0837834 8800034ff9d0
   Sep  28  08:31:14  ubuntu1  kernel: [169791.090413] Â 811d91a6
   8800034ff9d0 811a14ac ea00022e0bc0
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090415] Call Trace:
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090422] Â []
   dump_stack+0x45/0x57
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090436] Â []
   aufs_migratepage+0x44/0x50 [aufs]
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090439] Â []
   move_to_new_page+0x76/0x220
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090442] Â []
   migrate_pages+0x6f1/0x770
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090445] Â [] ?
   memcg_slab_show+0x80/0x80
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090448] Â [] ?
   isolate_freepages_block+0x3c0/0x3c0
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090450] Â []
   compact_zone+0x2c1/0x790
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090453] Â []
   compact_zone_order+0x6d/0x90
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090456] Â []
   try_to_compact_pages+0xfb/0x240
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090459] Â []
   __alloc_pages_direct_compact+0x3d/0xe6
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090463] Â []
   __alloc_pages_nodemask+0x531/0x990
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090466] Â [] ?
   alloc_pages_vma+0xaf/0x1f0
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090468] Â []
   alloc_kmem_pages_node+0x6a/0x130
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090472] Â [] ?
   copy_process.part.26+0xf3/0x1b90
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090474] Â []
   copy_process.part.26+0x113/0x1b90
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090477] Â []
   do_fork+0xd5/0x340
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090480] Â []
   SyS_clone+0x16/0x20
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090483] Â []
   stub_clone+0x6d/0x90
   Sep 28 08:31:14 ubuntu1 kernel: [169791.090484] Â [] ?
   system_call_fastpath+0x16/0x1b
   
   Full log at [2]http://pastebin.com/TpF1UZea ; I issued a hard reset to
   recover around 09:24, so you can see my startup logs after that point. I
   have AUFS managing only a single (4TB) disk but plan to stick with it and
   add more disks if I can get it stable.  Appreciate any advice, thanks.

References

   1. 
http://zackreed.me/articles/90-ubuntu-14-04-with-4-0-4-kernel-and-latest-aufs-from-source
   2. http://pastebin.com/TpF1UZea
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