Re: What version of the kernel fixes these VM issues?

[Daniel Phillips <phillips@bonn-fries.net>]

On August 24, 2001 08:14 pm, Nicolas Pitre wrote:
> On Fri, 24 Aug 2001, Daniel Phillips wrote:

> > Please try 2.4.9 and 2.4.8-ac10.  If the system slows down, look in your logs
> > and see if there are any "allocation failed" messages.  Use top or do watch
> > cat /proc/meminfo to be sure your system isn't going into swap, and please
> > let us know what happens.
> 
> I have a totally different setup but I can reproduce the same behavior on
> the system I have here:
> 
> ARM board with 32 MB RAM, no flash, NFS root.
> The kernel is based on 2.4.8-ac9 plus some small VM fixes from -ac10.

What happens with 2.4.9?

> My test consist in compiling gcc 3.0 while some MP3s are continously playing
> in the background.  The gcc build goes pretty far along until both the mp3
> player and the gcc build completely jam.  Oh maybe not completely as I get
> about 100ms of audio playing every 10 secs.  bash starts echoing what I type
> one char per approx 5 sec.  The only thing that still works fine is the
> magic sysrq that clearly shows that the CPU is spinning in the VM code. NFS
> trafic is also going on full bandwidth but no progress ever happens in user
> space.
> 
> My console is on a serial port so if someone can send me a patch with
> whatever printks to trace what's happening in real time I'll be glad to
> provide the trace file.  Reaching the jam state takes about 5 minutes so
> it's not hard to reproduce.

Try:

	watch cat /proc/meminfo

--
Daniel