Re: [Xenomai-help] BUG fs/buffer.c with Linux 2.6.26,27

[Philippe Gerum <rpm@xenomai.org>]

Roman Pisl wrote:
> Hello,
> I'm porting our application to Xenomai and I found a bug with Linux
> 2.6.26 and 2.6.27 (and also .19) and Xenomai 2.4.6.1. This happens when
> the application is running and there is hard disk activity. It happens
> also when latency test is running for a while. Linux 2.6.16 with Xenomai
> 2.4.6.1 works without problem. So this is solution for now.
> 
> Tested on x86 - thinkpad laptop and pentium 4 desktop.
> 
> I'm not a kernel hacker but surely try to help with fixing. I'd like to
> see this fixed.
>

2.4.7 is on hold precisely because we were trying to reproduce this random bug
for which we had previous reports, and which is likely x86 specific; so you can
bet we want this fixed asap as well.

Thanks for this detailed report; I think we should be able to make good use of it.

Two questions more:

- Could you send your kernel .config file?

- Could you tell us how long it takes on your setup to get this BUG_ON() trigger
with the latency test running (on the average)?

TIA,

> Thank you.
> 
> Roman Pisl
> 
> 
> 
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-- 
Philippe.