linux-kernel - Re: sysfs makes scaling suck Re: Asynchronous scsi scanning

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Message-ID: <20070517174952.GB30571@kvack.org>
Date:	Thu, 17 May 2007 13:49:52 -0400
From:	Benjamin LaHaise <bcrl@...ck.org>
To:	James Bottomley <James.Bottomley@...elEye.com>
Cc:	Satyam Sharma <satyam.sharma@...il.com>,
	Matthew Wilcox <matthew@....cx>,
	Simon Arlott <simon@...e.lp0.eu>,
	Dave Jones <davej@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-scsi@...r.kernel.org, kernel-packagers@...r.kernel.org,
	"Robert P. J. Day" <rpjday@...dspring.com>
Subject: Re: sysfs makes scaling suck Re: Asynchronous scsi scanning

On Thu, May 17, 2007 at 01:45:24PM -0400, James Bottomley wrote:
> But also, the sysfs with over 4,000 (and higher) devices was
> specifically checked by OSDL (actually as part of the CGL testing) some
> of the Manoj changes (for unpinning entries etc) were needed to get it
> to function, but as of now, I believe an enterprise scaling test works
> reasonably well for it ... there certainly wasn't any evidence of it
> dying horribly in the tests.

i386 exhausts lowmem very quickly.  SCSI is in a bit better shape than 
network devices as the multiplier is only around 4 compared to 16 for network 
devices.

My point stands, though.  Forcing every new feature to go in via sysfs is 
not the right thing to do.  Some people don't/can't use it, please remember 
them.

		-ben
-- 
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