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SubjectRe: [PATCH] cryptoapi: Fix sleeping
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On Wed, 2003-08-13 at 18:58, Matt Mackall wrote:

> This is part of cryptoapi and given the large chunks of work you could
> potentially hand to it, it's probably a good idea for it to work this
> way. You hand it a long list of sg segments, it does the transform and
> reschedules if it thinks it's safe. But its test of when it was safe
> was not complete.

Right. My concern is that you said sometimes it is called when
preemption is disabled.

I assume because it is accessing per-processor data.

It is illegal to reschedule -- regardless of kernel preemption -- while
in the middle of a critical section accessing per-processor data.

Robert Love


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