linux-kernel - Re: [PATCH tip/core/rcu] Reduce overhead of cond

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Message-ID: <20140623154931.GF8178@tassilo.jf.intel.com>
Date:	Mon, 23 Jun 2014 08:49:31 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, mingo@...nel.org,
	laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, tglx@...utronix.de, rostedt@...dmis.org,
	dhowells@...hat.com, edumazet@...gle.com, dvhart@...ux.intel.com,
	fweisbec@...il.com, oleg@...hat.com, dave.hansen@...el.com,
	cl@...two.org, umgwanakikbuti@...il.com
Subject: Re: [PATCH tip/core/rcu] Reduce overhead of cond_resched() checks
 for RCU

> On the topic of these threads; I recently noticed RCU grew a metric ton
> of them, I found some 75 rcu kthreads on my box, wth up with that?

It seems like RCU is growing in complexity all the time.

Can it be put on a diet in general? 

No more new CONFIGs please either.

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