Re: [uml-devel] Re: [uml-user] uml help __alloc_pages: 0-order allocation failed (gfp=0xf0/0)

[Blaisorblade <blaisorblade@yahoo.it>]

On Sunday 20 March 2005 23:25, Paul Warren wrote:
> [ trimmed cc to just -devel list]
>
> On Thu, Mar 17, 2005 at 08:49:38PM +0100, Blaisorblade wrote:
> > Paul Warren said that there is a leak in 2.4 UML related to hostfs
> > stuff.. and I already saw this message from some 2.4 recent UMLs. I hope
> > Paul Warren can explain what he saw and help us...
> >
> > In case we have confirmation it's hostfs-related, we only need to go back
> > to the stable 2.4.24-1um hostfs code (i.e. pre-humfs), as I already do in
> > the 2.4-bs tree.
>
> OK, our setup is that we have a load of distribution mirrors that are
> NFS mounted onto the host server.  The guests then mount these using
> hostfs.  We first noticed that a nightly updatedb was causing the amount
> of memory that could be malloced to decrease.  We found that doing a
> "find" across the entire hostfs mount also did the trick.
>
> I've attached the script and program that we used to meause the maximum
> amount of memory that can be malloced.  We then ran:
>
>  while : ; do ./maxalloc ; updatedb ; done
>
> ... and watched the memory leak away.

> Please let me know if you want some more info.
In priority order:
1) Try it on 2.6 and/or 2.4.27-bs (either bs1 or bs2-pre6, whichever you 
prefer and gives you less problems).
2) Try finding the item in /proc/meminfo (and if it's from Slab, 
inside /proc/slabinfo) which is increasing in the memory leak...
> Paul

-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729
http://www.user-mode-linux.org/~blaisorblade





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