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From: "Pedro M. Rodrigues" <pmanuel@myrealbox.com>
To: Rik van Riel <riel@conectiva.com.br>
Date: Sat, 31 Aug 2002 19:22:16 +0200
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Subject: Re: PROBLEM: nfs & "Warning - running *really* short on DMA buffers"
CC: Alan Cox <alan@lxorguk.ukuu.org.uk>, <linux-kernel@vger.kernel.org>
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   Replying to myself, i found out that in kernel 2.4.20-pre5, the 
section responsible for the warning has a #if  0 #endif around it . 
This was not the case in 2.4.19 btw. I had rate limited the warning, 
but it's not needed. 

Thanks to everybody,
Pedro

On 31 Aug 2002 at 15:29, Pedro M. Rodrigues wrote:

>    It doesn't seem rate limited to me, it floods the console and log
> files. If i can't tune the vm settings to decrease the likelyhood of
> this error message, what can i do? Is rate limiting the error message
> at scsi_merge.c a good idea?
> 
> 
> Thanks,
> Pedro
> 
> On 30 Aug 2002 at 9:18, Rik van Riel wrote:
> 
> > On Fri, 30 Aug 2002, Pedro M. Rodrigues wrote:
> > 
> > >    I do wan't to tune the vm settings, these warnings may not be
> > > fatal but it's not pretty to have hundreds of those in the console
> > > and log files. Bear with me on this one, but i remember doing
> > > exactly that in the past, tuning  /proc/sys/vm/freepages. How does
> > > one acomplish that nowadays? I looked at the kernel source
> > > documentation and still found references to freepages, but
> > > vm/freepages doesn't exist anymore. Kernel is 2.4.18-10 from
> > > Redhat.
> > 
> > For fundamental reasons it's always possible for non-sleeping
> > allocations to fail.  I think this warning just needs to be
> > rate-limited, if it isn't already ...
> > 
> > OTOH, failed allocations could serve as a hint for kswapd to
> > try to keep more memory free. I should look into that for some
> > next version.
> > 
> > regards,
> > 
> > Rik
> > -- 
> > Bravely reimplemented by the knights who say "NIH".
> > 
> > http://www.surriel.com/		http://distro.conectiva.com/
> > 
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