Re: dentry cache leak? Re: rsync out of memory 2.6.8-rc2

Klaus Dittrich
2004-07-26T20:35:58Z

Andrew Morton wrote:

>kladit@t-online.de (Klaus Dittrich) wrote:
>
>
>>>Can you narrow the onset of the problem down to any particular kernel
>>>
>>>
>> >snapshot?
>>
>> Did it and here is the answer.
>>
>> kernel-2.6.7 and bk's up to 2.6.7-bk7 survived a du -s,
>> kernels starting with 2.6.7-bk8 did not.
>>
>>
>
>Dammit, -bk7 to -bk8 is a 1.8M diff. Relevant changes include the switch
>to the rcu callbacks (make them take an rcu_head* rather than a void*) and
>the introduction of /proc/sys/vm/vfs_cache_pressure.
>
>So the immediate question is: please check the contents of your
>vfs_cache_pressure tunable. It should be 100. A setting of zero would
>cause this behaviour.
>
>
>
>> Compiler gcc-3.4.1
>>
>>
>
>It would be useful to try a different compiler version.
>
>There's _something_ different in your setup. If we can work out what this
>factor is, it will lead us to the bug.
>
>
>

cat /proc/sys/vm/vfs_cache_pressure shows 100.
Should I try an older or newer compiler ?