[Devel] Re: [lxc-devel] Memory Resources

[Krzysztof Taraszka]

2009/8/24 Daniel Lezcano <daniel.lezcano at free.fr>

> Krzysztof Taraszka wrote:
>
>> 2009/8/24 Daniel Lezcano <daniel.lezcano at free.fr>
>>
>>
>>> [ snip ]
>>>
>>>   i think that /proc/meminfo should be mounted after /proc . why? i think
>>>>
>>>>> that, because mounting /proc may override /proc/meminfo
>>>>>> Am I right? :)
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>  Ha ! haha ! arrgh ! no way ! You are right :/
>>>>>
>>>>>
>>>>>
>>>>>  Hehe ;)
>>>>
>>>>
>>>>
>>>>  In the case of application container, lxc mounts /proc but in the case
>>>>> of
>>>>> system container it is the system who do that so after the
>>>>> /proc/meminfo
>>>>> has
>>>>> been mounted.
>>>>>
>>>>> Maybe we can look at modifying fs/proc/meminfo.c instead. Let me do a
>>>>> small
>>>>> patch for the kernel...
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>  Okey. I am waiting for your patch :)
>>>>
>>>>  Quick and dirty patch but at least working. It is no synced on the
>>> latest
>>> kernel version.
>>> I do not really like to touch fs/proc/meminfo.c but it's an example here.
>>>
>>>
>>
>> Hi Daniel,
>>
>> I tried to compile my kernel tree (2.6.30.5) with your patch using
>> gcc-4.4,
>> gcc-4.3 and gcc-4.2 and i got this error on every gcc when linking kernel:
>>
>> mm/built-in.o: In function `mem_cgroup_info':
>> (.text+0x27651): undefined reference to `__udivdi3'
>> mm/built-in.o: In function `mem_cgroup_info':
>> (.text+0x27678): undefined reference to `__udivdi3'
>> mm/built-in.o: In function `mem_cgroup_info':
>> (.text+0x276b0): undefined reference to `__udivdi3'
>> mm/built-in.o: In function `mem_cgroup_info':
>> (.text+0x276dd): undefined reference to `__udivdi3'
>> make: *** [.tmp_vmlinux1] Error 1
>>
>> this can be gcc based error. What kernel and gcc did you use for compile
>> your kernel?
>>
>
> I used a 2.6.30 kernel and
> gcc (GCC) 4.3.0 20080428 (Red Hat 4.3.0-8)
> Compiled on a x86_64 host.
>
> Do you have any warning at the compile time ?
>
>
No, did not see any warnings when memcontrol.c or fs/meminfo.c was compiled.
Anyway, I will try to build in on the stable (lenny) version of debian
(right now I am working on unstable debian tree).
That might be gcc from unstable problem.

I will let you know what exactly problem is.

-- 
Krzysztof Taraszka
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