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

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Date:	Thu, 28 May 2009 13:48:18 -0700 (PDT)
From:	Martin Knoblauch <knobi@...bisoft.de>
To:	"Miller, Mike \(OS Dev\)" <Mike.Miller@...com>,
	"Owens, James" <JOwens@...com>
Cc:	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: "Miller, Mike (OS Dev)" <Mike.Miller@...com>
> To: Martin Knoblauch <knobi@...bisoft.de>; "Owens, James" <JOwens@...com>
> Cc: 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>
> Sent: Thursday, May 28, 2009 9:01:15 PM
> Subject: RE: Analyzed/Solved/Bisected: Booting 2.6.30-rc2-git7 very slow
> 
> 
> 
> > -----Original Message-----
> > From: Martin Knoblauch [mailto:knobi@...bisoft.de] 
> > Sent: Thursday, May 28, 2009 4:00 AM
> > To: Miller, Mike (OS Dev); Owens, James
> > Cc: 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
> > 
> > ----- Original Message ----
> > 
> > > From: "Miller, Mike (OS Dev)" 
> > > To: "Owens, James" ; Martin Knoblauch 
> > > 
> > > Cc: 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 
> > > 
> > > Sent: Wednesday, May 27, 2009 8:18:46 PM
> > > Subject: RE: Analyzed/Solved/Bisected: Booting 2.6.30-rc2-git7 very 
> > > slow
> > > 
> > > > > 
> > > > >  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.
> > > 
> > Hi Mike, Jim
> > 
> >  you are right. I never talked to you about this issue. 
> > Actually, I did not suspect CCISS or the DL380 in general to 
> > be involved before last week when I retested on the x3650 and 
> > the problem went away. Due to day-job and priorities I did 
> > not follow up.
> 
> Martin,
> Same exact OS install? Are you sure all the userspace stuff is the same?
> 

 yup. Exactely same user-space. Same kernel config. Only difference is aacraid vs. cciss module in initrd

> -- mikem
> > > 
> > > > 
> > > > If they don't react soon, I'll make this my own day job to try to 
> > > > reproduce it.  We will need hardware config details and firmware 
> > > > revs to start.
> > > > 
> > 
> > Dl380/G4
> > 2x3.4 GHz CPUs
> > 8 GB Memeory
> > 4x72 GB as RAID5 on SA6i controller
> > 
> > BIOS: P51 (07(19/2007)
> > ILO FW: 1.91
> > SA6i FW: 2.84
> > 
> > lspci output (-vvv and -xxx) appendend to prevent line wrapping.
> > 
> > 
> > Cheers
> > Martin
> > 

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