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

[Klaus Dittrich]

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                                                         
> >
> >
> > --
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> >    
>
>  
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
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