Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756704Ab1EFT0t (ORCPT ); Fri, 6 May 2011 15:26:49 -0400 Received: from mail-wy0-f174.google.com ([74.125.82.174]:36326 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755049Ab1EFT0s (ORCPT ); Fri, 6 May 2011 15:26:48 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:from:to:cc:in-reply-to:references:content-type:date :message-id:mime-version:x-mailer:content-transfer-encoding; b=Dd5UrG+mwAMwDgjXmb2VvPQA9r0ttuwO0X3RlBxNf+wVhuorqFDzjRwON7c/TfHe7s 0UII2TD7PP6ixqK7XRssANUz+OUw2vRQ5gZWVw9/zTy/6WyaovmtSwmz3I99QOiDAFbR 1qeQNBL5dzTDP1F6ZRV4hk5Pc36TzpzEIKjxI= Subject: Re: [RFC] time: xtime_lock is held too long From: Eric Dumazet To: Andi Kleen Cc: Thomas Gleixner , john stultz , lkml , Paul Mackerras , "Paul E. McKenney" , Anton Blanchard , Ingo Molnar In-Reply-To: <20110506175051.GL11636@one.firstfloor.org> References: <1304574244.32152.666.camel@edumazet-laptop> <1304576495.2943.40.camel@work-vm> <1304604284.3032.78.camel@edumazet-laptop> <1304608095.3032.95.camel@edumazet-laptop> <20110505210118.GI2925@one.firstfloor.org> <20110506165913.GF11636@one.firstfloor.org> <1304703767.3066.211.camel@edumazet-laptop> <20110506175051.GL11636@one.firstfloor.org> Content-Type: text/plain; charset="UTF-8" Date: Fri, 06 May 2011 21:26:43 +0200 Message-ID: <1304710003.2821.0.camel@edumazet-laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 823 Lines: 24 Le vendredi 06 mai 2011 à 19:50 +0200, Andi Kleen a écrit : > On Fri, May 06, 2011 at 07:42:47PM +0200, Eric Dumazet wrote: > > Le vendredi 06 mai 2011 à 18:59 +0200, Andi Kleen a écrit : > > > > > If you have a better way to make it faster please share it. > > > > Ideally we could use RCU :) > > Hmm, I didn't think my case had a lot of loops in the seqlock -- just > expensive cache misses -- but I should double check. > > For the lots of loop case we probably need to understand first why you > iterate that often. Yep, I'll try to investigate on this Thanks ! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/