Re: [patches] kernel timer races

From: Andrew Morton (
Date: Thu May 25 2000 - 10:56:31 EST

bug1 wrote:
> ..
> Hi, i just got your "del_timer(c77ebf40) during handler execution"
> message.
> I got the message seconds prior to a "hdk: timeout waiting for DMA"
> message.
> ...
> So, this means that a race condition was found. Is it likely that this
> race condition was casued by the DMA timeout, or could the DMA timeout
> be caused by the race ?

I'd say they're unrelated. The IDE timer code looks watertight to me
(in fact it's a del_timer_async()) candidate...).

Your next step should be to fire up gdb, poke the stack backtrace
addresses into it and see where the del_timer() was called from.

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