linux-kernel - Re: [PATCH 5/6] syslets: add generic syslets infrastructure

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Date:	Wed, 9 Jan 2008 15:05:27 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Rusty Russell <rusty@...tcorp.com.au>
cc:	Zach Brown <zach.brown@...cle.com>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>,
	Ulrich Drepper <drepper@...hat.com>,
	Arjan van de Ven <arjan@...radead.org>,
	Andrew Morton <akpm@....com.au>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Evgeniy Polyakov <johnpol@....mipt.ru>,
	"David S. Miller" <davem@...emloft.net>,
	Suparna Bhattacharya <suparna@...ibm.com>,
	Davide Libenzi <davidel@...ilserver.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Dan Williams <dan.j.williams@...il.com>,
	Jeff Moyer <jmoyer@...hat.com>,
	Simon Holm Thogersen <odie@...aau.dk>,
	suresh.b.siddha@...el.com
Subject: Re: [PATCH 5/6] syslets: add generic syslets infrastructure



On Wed, 9 Jan 2008, Linus Torvalds wrote:
> 
> Try this with and without a "echo 3 > /proc/sys/vm/drop_caches" in 
> between. Both are real and relevant usage cases, I think.

Side note, for me the difference on my home directory for the cached vs 
uncached case is 5 seconds vs 5 minutes. I like the 5 sec, I'd like to 
improve on that 5 min.

Is this test a bit *too* simplistic? Probably. But I think that if we can 
come up with an interface that works ok for that test, it at least signals 
*something*.

			Linus
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