Re: VFS: file-max limit 50044 reached

[Dipankar Sarma <dipankar@in.ibm.com>]

On Mon, Oct 17, 2005 at 11:10:04AM +0200, Eric Dumazet wrote:
> Dipankar Sarma a écrit :
> >
> >IMO, putting the file accounting in slab ctor/dtors is not very
> >reliable because it depends on slab not getting fragmented.
> >Batched freeing in RCU is just an extreme case of it. We needed
> >to fix file counting anyway.
> >
> >Thanks
> >Dipankar
> 
> But isnt this file counting a small problem ?
> 
> This small program can eat all available memory.
> 
> Fixing the 'file count' wont fix the real problem : Batch freeing is good 
> but should be limited so that not more than *billions* of file struct are 
> queued for deletion.

Agreed. It is not designed to work that way, so there must be
a bug somewhere and I am trying to track it down. It could very well
be that at maxbatch=10 we are just queueing at a rate far too high
compared to processing.

> I believe we can find a solution, even if it might delay 2.6.14 because 
> Linus would have to release a rc5

This I am not sure, it is Linus' call. I am just trying to do the
right thing - fix the real problem.

Thanks
Dipankar
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