linux-kernel - Re: [PATCH 10/13] x86: Move cond resched for copy_{from,to}

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Message-ID: <20130810161031.GK19750@two.firstfloor.org>
Date:	Sat, 10 Aug 2013 18:10:31 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Ingo Molnar <mingo@...nel.org>, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 10/13] x86: Move cond resched for copy_{from,to}_user
 into low level code 64bit

> Most of this series looks fine, but I really think that we
> could/should just take that extra step, and say "no, user accesses
> don't imply that we need to check for scheduling".

Hmm. I can do that, but wouldn't that make CONFIG_PREEMPT_VOLUNTARY
mostly equivalent to CONFIG_PREEMPT_NONE?

Need to check how many other reschedule tests are left then for VOLUNTARY.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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