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

Klaus Dittrich
2004-07-19T13:11:55Z

bert hubert wrote:

>/proc/fs/dentry-state of course, sorry
>
>On Mon, Jul 19, 2004 at 01:20:47PM +0200, bert hubert wrote:
>
>
>>On Mon, Jul 19, 2004 at 11:19:43AM +0200, Klaus Dittrich wrote:
>>
>>
>>
>>>I found out I could trigger the memory outage using du -s /disc1 too.
>>>
>>>
>>Including crashing and/or running out of swap? That would indicate that the
>>dentry cache is not cleaning itself up, or that something is wrong with
>>reference counting.
>>
>>Can you run 'cat fs/dentry-state' before and after the du -s? (assuming
>>there is an 'after'. Also, which fs is /disc1 on? any messages in dmesg?
>>
>>dentry-state
>>------------
>>
>>Status of the directory cache. Since directory entries are
>>dynamically allocated and deallocated, this file indicates the current
>>status. It holds six values, in which the last two are not used and are
>>always zero. The others are listed in table 2-1.
>>
>>
>>Table 2-1: Status files of the directory cache
>>..............................................................................
>> File Content
>> nr_dentry Almost always zero
>> nr_unused Number of unused cache entries
>> age_limit
>> in seconds after the entry may be reclaimed, when memory is
>>short
>> want_pages internally
>>
>>
>>--
>>http://www.PowerDNS.com Open source, database driven DNS Software
>>http://lartc.org Linux Advanced Routing & Traffic Control HOWTO
>>-
>>To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>>the body of a message to majordomo@vger.kernel.org
>>More majordomo info at http://vger.kernel.org/majordomo-info.html
>>Please read the FAQ at http://www.tux.org/lkml/
>>
>>
>>
>
>
>
The fs is ext2.cat /proc/sys/fs/dentry-state
Output of cat /proc/sys/fs/dentry-state before and after processes got
killed.
891083 888395 45 0 0 0
1142933 1085759 45 0 0 0
--
Klaus