Re: [PATCH 0/2] enable irqs when waiting for rwlocks

From: Rick Jones
Date: Wed Oct 22 2008 - 13:32:20 EST

Petr Tesarik wrote:

SGI has observed that on large systems, interrupts are not serviced for
a long period of time when waiting for a rwlock. The following patch
series re-enables irqs while waiting for the lock, resembling the code
which is already there for spinlocks.

Perhaps I'm just out in left field, but that (and the similar behaviour for obtaining a spinlock?) feels like treating a symptom rather than a root cause where the root cause would appear to be long lock hold times/contention?

rick jones
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