Messages in this thread | | | Date | Tue, 28 Apr 2009 18:44:21 +0200 | From | Frederic Weisbecker <> | Subject | Re: LTTng "TIF_KERNEL_TRACE" |
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On Tue, Apr 28, 2009 at 12:38:25PM -0400, Mathieu Desnoyers wrote: > No, read-write lock is a "special case" where it does not deadlock if > you have an interrupt handler taking the read lock over another read > lock. It's just the write lock that _must absolutely_ disable > interrupts.
Ah, you're right, I was thinking with spinlock rules in mind :)
> However, the "latency race" scenario I explained above applies here, > because the write lock disables interrupts and the read locks doesn't. > > Mathieu >
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