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Re: Making spl7 just cli/sti?

From: Samuel Thibault
Subject: Re: Making spl7 just cli/sti?
Date: Sun, 14 Dec 2014 17:59:24 +0100
User-agent: Mutt/1.5.21+34 (58baf7c9f32f) (2010-12-30)

Richard Braun, le Sun 14 Dec 2014 15:44:44 +0100, a écrit :
> If the critical sections protected by this lock are all small enough,
> granularity tends to matter much less. My point being that this could
> be generalized for all IPLs,

Yes, but investigation is needed to make sure that the protected
sections are indeed small.  It appeared that the sched level was,
indeed, I haven't checked the others.

> since they are all affected by the virtualization penalty.

Yes, but provided they are not too frequent, it doesn't pose problem.


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