Re: Fw: two 2.6.13-rc3-mm3 oddities

[Hugh Dickins <hugh@veritas.com>]

On Mon, 8 Aug 2005, Dipankar Sarma wrote:
> On Wed, Aug 03, 2005 at 09:56:44AM +1000, Andrew Morton forwarded from Hugh:
> > 
> > Subject: two 2.6.13-rc3-mm3 oddities
> > 
> > One time my tmpfs-and-looped-tmpfs-kernel-builds collapsed with lots of
> > VFS: file-max limit 49778 reached
> > messages, which I imagine was a side-effect of the struct file RCU
> > patches you've dropped from -rc4-mm1, perhaps a grace period problem.
> 
> Hugh, could you please try this with the experimental patch below ?

I'll give it a go.  But first I ought to try to reproduce the problem
more easily - it happened after about two hours of a test which had run
for two or more hours (before hitting the apparently unrelated problem)
at least twice each on at least two machines.  So until I can reproduce
the problem more easily, it'll take some while to have confidence that
your patch addresses it.  Therefore worth a little effort at my end to
cut it down (and if I can't cut it down, I may have to solve the odder
locked page issue to get the original test to run long enough to hit
the file-max problem with any likelihood).

> Hugh, can you mail me the exact test you run ? I would like to run
> it myself and see if I can reproduce it.

It'll waste less of both our time if I at least try to reproduce it
more quickly first.  Hold on...

Hugh