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Re: ext3 instability in RH8.0?



Hi,

On Thu, 2003-01-02 at 01:00, Thomas Reinke wrote:

> 2. After about 10-15 seconds, "bo" activity drops to ZERO, and
>     context switching ramps up to about 1,000,000 per second.
>     After a while, the context switches drop back down, and we're
>     back to seeing heavy "bo" activity.

That's definitely "wrong".  I'm wondering if there's an O(1) scheduler
interaction at play here, as postfix's synchronous IO patterns trigger
yielding behaviour which changed significantly in O(1).

Could you possibly either capture a kernel profile of this situation, or
use alt-sysrq-r to capture a few samples of what the CPU is up to when
the problem occurs?

Thanks,
 Stephen





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