Re: [patch] remove the BKL (Big Kernel Lock), this time for real

From: Ricky Beam
Date: Wed Sep 15 2004 - 12:16:37 EST


On Wed, 15 Sep 2004, Ingo Molnar wrote:
>yes, but progress in this area seems to have slowed down, and people are
>hurting from the latencies introduced by the BKL meanwhile. Who cares if
>some rare big chunk of code runs under a semaphore, as long as it's
>preemptable?

"as long as it's preemptable" is the key there. Not all arch's can run
with PREEMPT enabled (yet) -- sparc/sparc64 for but one. And at the moment,
PREEMPT is a bit on the hosed side.

--Ricky


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