linux-kernel - Re: [PATCH 0/3] sched, timer: Improve scalability of itimers

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Message-ID: <CA+55aFzqiSk1fMiTcTAODr5m6hwj49h0SKN+GA1biNavAkAKQQ@mail.gmail.com>
Date:	Tue, 14 Apr 2015 16:53:43 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Jason Low <jason.low2@...com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Mike Galbraith <umgwanakikbuti@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mel Gorman <mgorman@...e.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>,
	hideaki.kimura@...com, Aswin Chandramouleeswaran <aswin@...com>,
	Scott J Norton <scott.norton@...com>
Subject: Re: [PATCH 0/3] sched, timer: Improve scalability of itimers

On Tue, Apr 14, 2015 at 4:09 PM, Jason Low <jason.low2@...com> 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
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