Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755535AbbDNXxw (ORCPT ); Tue, 14 Apr 2015 19:53:52 -0400 Received: from mail-ig0-f177.google.com ([209.85.213.177]:36507 "EHLO mail-ig0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751386AbbDNXxn (ORCPT ); Tue, 14 Apr 2015 19:53:43 -0400 MIME-Version: 1.0 In-Reply-To: <1429052986-9420-1-git-send-email-jason.low2@hp.com> References: <1429052986-9420-1-git-send-email-jason.low2@hp.com> Date: Tue, 14 Apr 2015 16:53:43 -0700 X-Google-Sender-Auth: 7OUihoEqRqbvG7VXa5sWDboJNwk Message-ID: Subject: Re: [PATCH 0/3] sched, timer: Improve scalability of itimers From: Linus Torvalds To: Jason Low Cc: Peter Zijlstra , Ingo Molnar , Thomas Gleixner , Linux Kernel Mailing List , "Paul E. McKenney" , Andrew Morton , Oleg Nesterov , Mike Galbraith , Frederic Weisbecker , Mel Gorman , Steven Rostedt , Preeti U Murthy , hideaki.kimura@hp.com, Aswin Chandramouleeswaran , Scott J Norton Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 716 Lines: 15 On Tue, Apr 14, 2015 at 4:09 PM, Jason Low wrote: > This patchset improves the scalability of itimers, thread_group_cputimer > and addresses a performance issue we found while running a database > workload where more than 30% of total time is spent in the kernel > trying to acquire the thread_group_cputimer spinlock. I'm ok with this series, but I'm going to assume that I'll get it through the scheduler tree. Ingo? Linus -- 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/