Re: [uml-user] WARNING: at mm/page_alloc.c:2386 __alloc_pages_nodemask+0x153/0x750()

[Toralf F. <tor...@gm...>]

On 03/13/2013 11:15 AM, richard -rw- weinberger wrote:
> On Tue, Mar 12, 2013 at 9:59 PM, Toralf Förster <tor...@gm...> wrote:
>> While trying trinity under a UML I often run into this situation :
>>
>>
>> 2013-03-12T21:54:41.934+01:00 trinity kernel: ------------[ cut here ]------------
>> 2013-03-12T21:54:41.934+01:00 trinity kernel: WARNING: at mm/page_alloc.c:2386 __alloc_pages_nodemask+0x153/0x750()
>> 2013-03-12T21:54:41.934+01:00 trinity kernel: 3837fcfc:  [<083426b8>] dump_stack+0x22/0x24
>> 2013-03-12T21:54:41.934+01:00 trinity kernel: 3837fd14:  [<0807d11a>] warn_slowpath_common+0x5a/0x80
>> 2013-03-12T21:54:41.934+01:00 trinity kernel: 3837fd3c:  [<0807d1e3>] warn_slowpath_null+0x23/0x30
>> 2013-03-12T21:54:41.934+01:00 trinity kernel: 3837fd4c:  [<080d2bb3>] __alloc_pages_nodemask+0x153/0x750
>> 2013-03-12T21:54:41.934+01:00 trinity kernel: 3837fdd8:  [<080d31d8>] __get_free_pages+0x28/0x50
>> 2013-03-12T21:54:41.934+01:00 trinity kernel: 3837fdf0:  [<080fbe1f>] __kmalloc_track_caller+0x3f/0x180
>> 2013-03-12T21:54:41.934+01:00 trinity kernel: 3837fe18:  [<080de616>] memdup_user+0x26/0x70
>> 2013-03-12T21:54:41.934+01:00 trinity kernel: 3837fe34:  [<080de81e>] strndup_user+0x3e/0x60
>> 2013-03-12T21:54:41.935+01:00 trinity kernel: 3837fe50:  [<0823c493>] sys_request_key+0x53/0x170
>> 2013-03-12T21:54:41.935+01:00 trinity kernel: 3837feac:  [<08062a92>] handle_syscall+0x82/0xb0
>> 2013-03-12T21:54:41.935+01:00 trinity kernel: 3837fef4:  [<08074e7d>] userspace+0x46d/0x590
>> 2013-03-12T21:54:41.935+01:00 trinity kernel: 3837ffec:  [<0805f7cc>] fork_handler+0x6c/0x70
>> 2013-03-12T21:54:41.935+01:00 trinity kernel: 3837fffc:  [<00000000>] 0x0
>> 2013-03-12T21:54:41.935+01:00 trinity kernel:
>> 2013-03-12T21:54:41.935+01:00 trinity kernel: ---[ end trace 2e631e8b4588be93 ]---
>> 2013-03-12T21:54:41.935+01:00 trinity kernel: VFS: Warning: trinity-child0 using old stat() call. Recompile your binary.
>> 2013-03-12T21:54:41.935+01:00 trinity kernel: VFS: Warning: trinity-child0 using old stat() call. Recompile your binary.
> 
> Do you see this with both slub and slab?
> 

With SLUB (linux-v3.9-rc2-178-g4febd95) I see that behaviour.

A recent UML kernel with SLAB (linux-v3.9-rc2-188-g6c23cbb) holds just
here in trinity output :

[1050] [2174] getrlimit(resource=3, rlim=1) = -1 (Bad address)
[1050] [2175] ustat(dev=4096, ubuf=4) = -1 (Invalid argument)
[1050] [2176] mremap(addr=0, old_len=0x80000001, new_len=0xffa2,
flags=1, new_addr=0) [watchdog] 2177 iterations. [F:1790 S:386]
[watchdog] kernel became tainted! Last seed was 2735014321

after that the system hangs. I can still ssh into it from other console
and run "ps -ef" ,
but even a "ps -ef | grep <bla bla>" then hangs too and can't be stopped
via Ctrl.C.

Furthermore "gdb -p <pid>" could not be run, b/c in the meanwhile the
pids are vanished too (at least from /proc).
And the syslog and anything else is empty.


Host kernel is always 3.7.10.

-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3