linux-kernel - Re: [PATCH] vmstat: on demand updates from differentials V7

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <alpine.DEB.2.10.1406031127080.14380@gentwo.org>
Date:	Tue, 3 Jun 2014 11:28:18 -0500 (CDT)
From:	Christoph Lameter <cl@...two.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Gilad Ben-Yossef <gilad@...yossef.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Tejun Heo <tj@...nel.org>, John Stultz <johnstul@...ibm.com>,
	Hakan Akkan <hakanakkan@...il.com>,
	Max Krasnyansky <maxk@...lcomm.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, hughd@...gle.com,
	viresh.kumar@...aro.org, hpa@...or.com, mingo@...nel.org,
	peterz@...radead.org, Mike Frysinger <vapier@...too.org>,
	Minchan Kim <minchan.kim@...il.com>
Subject: Re: [PATCH] vmstat: on demand updates from differentials V7

On Tue, 3 Jun 2014, Frederic Weisbecker wrote:

> So after the cpumask_var_t conversion I have no other concern except
> perhaps that the scan may bring some overhead on workloads that don't
> care about isolation. You might want to make it optional. But I let you
> check that.

Testing so far indicates that typical loads have spurts of kernel usage
which need vmstat but otherwise there are large segments of processing
that do not need the vmstat worker. It seems that this change is generally
helpful.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/