Re: What exactly are the issues with 2.6.0-test10 preempt?

Guennadi Liakhovetski
2003-11-24T21:09:51Z

On Mon, 24 Nov 2003, Bradley Chapman wrote:

> I saw in Linus' 2.6.0-test10 announcement that preempt is suffering from some
> problems and should not be used. However, I am currently running 2.6.0-test10
> with CONFIG_PREEMPT=y and nothing has appeared yet. To see if the problem appeared
> under stress, I started an A/V trailer playback with mplayer and then ran the
> find command on both my home directory and the 2.6.0-test10 kernel source directory,
> with the expected result - mplayer did not skip, neither find invocation broke,
> and there were no nasty errors in dmesg.
>
> So what exactly is the problem?

Well, FWIW, I'm getting 100% reproducible Oopses on __boot__ by enabling
preemption AND (almost) all kernel-hacking CONFIG_DEBUG_* options - see my
post of 21.11.2003 with subject "[OOPS] 2.6.0-test7 + preempt + hacking".
If required, could try to narrow it down to 1 CONFIG option. However, the
Oops itself happens somewhere in NFS code (see backtrace in above email
for details).

Guennadi
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Guennadi Liakhovetski