linux-kernel - RE: Analyzed/Solved/Bisected: Booting 2.6.30-rc2-git7 very slow

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Message-ID: <0F5B06BAB751E047AB5C87D1F77A7788694630BB17@GVW0547EXC.americas.hpqcorp.net>
Date:	Wed, 27 May 2009 21:18:58 +0000
From:	"Miller, Mike (OS Dev)" <Mike.Miller@...com>
To:	"Owens, James" <JOwens@...com>
CC:	Martin Knoblauch <knobi@...bisoft.de>,
	Matthew Wilcox <matthew@....cx>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mike Galbraith <efault@....de>,
	"viro@...IV.linux.org.uk" <viro@...IV.linux.org.uk>,
	"rjw@...k.pl" <rjw@...k.pl>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"tigran@...azian.fsnet.co.uk" <tigran@...azian.fsnet.co.uk>,
	Kay Sievers <kay.sievers@...y.org>,
	"shemminger@...tta.com" <shemminger@...tta.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: RE: Analyzed/Solved/Bisected: Booting 2.6.30-rc2-git7 very slow

 

> -----Original Message-----
> From: Owens, James 
> Sent: Wednesday, May 27, 2009 3:13 PM
> To: Miller, Mike (OS Dev)
> Cc: Martin Knoblauch; Matthew Wilcox; Andrew Morton; Mike 
> Galbraith; viro@...IV.linux.org.uk; rjw@...k.pl; 
> linux-kernel@...r.kernel.org; tigran@...azian.fsnet.co.uk; 
> Kay Sievers; shemminger@...tta.com; Jesse Barnes
> Subject: Re: Analyzed/Solved/Bisected: Booting 
> 2.6.30-rc2-git7 very slow
> 
> Miller, Mike (OS Dev) wrote:
> >>>  Finally, today I built the ccsii driver into the kernel. 
> >> It was previously modularized and loaded from initrd. The second 
> >> "sysfs" line went away. But does this make cciss guilty? It is now 
> >> loaded about 2 seconds earlier in the boot sequence, which 
> is a big 
> >> change in timing I guess.
> >>>  Enlighten me :-)
> >> No idea what is going on, but since I saw your May 20 
> message, I have 
> >> been trying to wake up someone whose day job it should be to care 
> >> about dl380s and smartarrays. :)
> > 
> > What? I know Martin has pinged me in the past, but I do not 
> think it was about this issue. If there's multiple sysfs 
> entries for cciss I can't explain that offhand. We do little 
> to nothing for sysfs in the driver.
> > Had something similiar happen recently where "/" changed to 
> "!". Had do to with our nested directory structure, 
> /dev/cciss/name vs /dev/name. But we did not make that change, either.
> 
> It was not you that I was trying to get to look at this...
> but now that I have your attention :)
> 
> I did not think it pointed at cciss or the sysfs entry as 
> being the problem.  I was wondering more about platform probe 
> timing, the bios, and how each card firmware reacts given 
> what I thought the patch did.  I could be totally wrong about 
> that as I work at the filesystem level.
> 
> We have not seen the problem yet but we have different 
> proliants/smartarrays.
> 
> If you can try it on matching hardware, great, if not then 
> someone will eventually find a system to test it.
> 
Sorry, I don't have any hw that old. We're very limited on space these days.

-- mikem--
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