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SubjectRe: [PATCH] kernel BUG at sched.c:944! only with CONFIG_PREEMPT=y]

On 12 Sep 2002, Robert Love wrote:

> While this sounds like a great debugging check, it is not useful in
> general since we surely have some bad code that calls schedule() with
> locks held. Further, since the atomic accounting only includes locks if
> CONFIG_PREEMPT is set, you only see this with kernel preemption enabled.

it *is* a great debugging check, at zero added cost. Scheduling from an
atomic region *is* a critical bug that can and will cause problems in 99%
of the cases. Rather fix the asserts that got triggered instead of backing
out useful debugging checks ...


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