Re: Linux 2.6.35

[Randy Dunlap]

On Tue, 03 Aug 2010 13:45:45 -0400 Donald Parsons wrote:

> On Tue, 2010-08-03 at 09:40 -0700, Randy Dunlap wrote:
> > On Tue, 03 Aug 2010 12:26:50 -0400 Donald Parsons wrote:
> > 
> > > Resending to all...
> > > On Mon, 2010-08-02 at 21:42 -0700, Randy Dunlap wrote:
> > > > On Mon, 02 Aug 2010 22:31:41 -0400 Donald Parsons wrote:
> > > > 
> > > > > On Mon, 2010-08-02 at 18:08 +0200, Harald Hoyer wrote: 
> > > > > > On Mon, Aug 2, 2010 at 6:21 AM, Donald Parsons <dparsons@xxxxxxxxxxxxx> wrote:
> > > > > > > On Sun, 2010-08-01 at 21:38 -0600, Bjorn Helgaas wrote:
> > > > > > >> On Sunday, August 01, 2010 08:31:02 pm Donald Parsons wrote:
> > > > > > >> > 2.6.35 still fails to boot for me, as first reported here:
> > > > > > >> >  http://lkml.indiana.edu/hypermail/linux/kernel/1007.3/01144.html
> > > > > > >> >
> > > > > > >> > I've manually bisected it down to around May 20 between
> > > > > > >> >   2.6.34-git4 (boots) and 2.6.34-git5 (boot fails)
> > > > > > >> > Also -git[23] boot, and -git8, -rc[126], rc6-git[136] all fail.
> > > > > > >> >
> > > > > > >> > Unfortunately first time I tried was with 2.6.35-rc6 and
> > > > > > >> > it failed to boot.
> > > > > > >> >
> > > > > > >> > Failure when switching from initramfs to real /root?
> > > > > > >> > Removing kernel "quiet" param appears to show several
> > > > > > >> > lines listing:
> > > > > > >> >
> > > > > > >> >   usb drives/hubs? followed by
> > > > > > >> >   dracut switching root (when booting works)
> > > > > > >> >               or
> > > > > > >> >   usb drives/hubs? followed by
> > > > > > >> >         (missing dracut... line)
> > > > > > >> >   No root device found
> > > > > > >> >   Boot has failed, sleeping forever.   (when it does not boot)
> > > > > > >> >
> > > > > > >> > Grub, typical entry:
> > > > > > >> > title Fedora (2.6.35)
> > > > > > >> >     root (hd0,0)
> > > > > > >> >     kernel /vmlinuz-2.6.35 ro
> > > > > > >> > root=UUID=686dc496-8814-4c36-8fb7-5ded2916e825 rhgb
> > > > > > >> > SYSFONT=latarcyrheb-sun16 LANG=en_US.UTF-8 KEYTABLE=us
> > > > > > >> > rdblacklist=nouveau init=/sbin/bootchartd
> > > > > > >> >     initrd /initramfs-2.6.35.img
> > > > > > >> >
> > > > > > >> >
> > > > > > >> > My boot failure seems to be different than other two reported
> > > > > > >> > in the thread "2.6.35-rc6-git6: Reported regressions from 2.6.34"
> > > > > > >> > under Bug #16173 and #16228
> > > > > > >>
> > > > > > >> Will it boot with the "pci=nocrs" option?  If so, please open a
> > > > > > >
> > > > > > > No, I tried this on a few attempts when I saw it mentioned under
> > > > > > > bug #16228.  But it had no effect/benefit.  Sorry, I should have
> > > > > > > mentioned this.
> > > > > > >
> > > > > > >> report at https://bugzilla.kernel.org, mark it a regression, assign
> > > > > > >> it to me, and attach the complete dmesg log.  And please respond to
> > > > > > >> this thread with a pointer to the bugzilla.
> > > > > > >>
> > > > > > >> Otherwise, a complete console log should have a clue.  The best
> > > > > > >> thing would be a log from a serial console or netconsole, with
> > > > > > >> "ignore_loglevel".
> > > > > > >
> > > > > > > Maybe I will try netconsole tomorrow.  But is Ethernet up when
> > > > > > > this boot failure happens?  I think not, since initramfs should
> > > > > > > not need networking.
> > > > > > >
> > > > > > > Should I try building sata driver into kernel?  Oh, I am using
> > > > > > > ext3, and fdisk -l shows:
> > > > > > 
> > > > > > # dracut --add-drivers "sata" ....
> > > > > > 
> > > > > > or edit /etc/dracut.conf:
> > > > > > 
> > > > > > add_drivers+=" sata "
> > > > > 
> > > > > But the kernel used to boot with same identical modules before
> > > > > but not after 2.6.34-git4.
> > > > >  --------
> > > > > 
> > > > > Using your suggestion as to where the problem lies, I investigated
> > > > > more deeply and found:
> > > > > 
> > > > > I've now got 2.6.35-rc6-git3 to boot (and almost certainly 2.6.35 final)
> > > > > 
> > > > > Make oldconfig broke at the transition where boot began failed, ie,
> > > > > between 2.6.34-git4 and 2.6.34-git5.   Even though modules are the
> > > > > same, boot fails.  If I use gconfig and set CONFIG_SATA_AHCI=y
> > > > > instead of CONFIG_SATA_AHCI=m it works, except cannot select =y
> > > > > unless CONFIG_ATA changed from m to y.
> > > > > 
> > > > > So at some point in past, make oldconfig had apparently changed
> > > > > CONFIG_SATA_AHCI from y to m and system still booted.  But between
> > > > > 2.6.34-git4 and 2.6.34-git5 the ability to boot was lost.
> > > > > 
> > > > > So make oldconfig is not 100% trustworthy in this case.  I do not
> > > > > know if this is a problem that should be fixed.  Ask if you want
> > > > > any .config diffs.
> > > > > 
> > > > > I am going to reboot with 2.6.35 to make sure it boots. Yes!
> > > > > 
> > > > > I consider this boot problem solved unless someone wants to
> > > > > improve "make oldconfig" behavior.
> > > > 
> > > > It would be good to be able to explain what you are seeing & describing,
> > > > so yes, if you can send a .config file that exhibits the problem, I'd
> > > > love to look at it.
> > > > 
> > > > thanks,
> > > > ---
> > > > ~Randy
> > > 
> > > 
> > > Okay, here is the diff between 2.6.34-git4 and 2.6.34-git5
> > > It should be equivalent to make silentoldconfig as I made no
> > > changes, just enter to accept defaults.  The git4 boots and
> > > git5 does not boot.     (Both based off 2.6.34.1.config)
> > 
> > Yes, I had just generated this same diff.
> > The only config change that could remotely make a difference is:
> > > +# CONFIG_SATA_AHCI_PLATFORM is not set
> > 
> > and I don't see how it could matter.
> > 
> > > (and attached config-2.6.34-git4.gz, because .config was too
> > >  big for mail list last time.)
> > 
> > Last time being recently?  lkml accepts email sizes (with attachments)
> > up to 300 KB, IIRC.
> 
> Maybe http://lkml.indiana.edu/hypermail/linux/kernel/1008.0/index.html
> throws out large email but the actual lkml does not?  I did not see
> it show up; here is header of email that had large (56.48K) .config:
> 
> From: 	Donald Parsons
> To: 	Randy Dunlap
> Cc: 	linux-kernel <linux-kernel@xxxxxxxx>, Linus Torvalds
> Subject: Re: Linux 2.6.35
> Date: 	08/01/2010 11:41:31 PM  (this is EDT)
> Mailer: Evolution 2.28.3 (2.28.3-1.fc12) 
> 
> 
> > > --- config-2.6.34-git4  2010-08-01 19:52:48.000000000 -0400
> > > +++ config-2.6.34-git5  2010-08-01 18:10:14.000000000 -0400
> > > @@ -1,7 +1,7 @@
> > >  #
> > >  # Automatically generated make config: don't edit
> ...deleted most lines...
> > > -#
> > >  # CONFIG_STAGING is not set
> > >  CONFIG_X86_PLATFORM_DEVICES=y
> > >  # CONFIG_ACER_WMI is not set
> > > 
> > > -------------------------------------------
> > > 
> > > Can possibly duplicate problem if you have a 
> > > sata based PC from last few years.
> > > 
> > > Set  CONFIG_ATA=m
> > 
> > That's already =m in this config file.
> > 
> > > and this becomes CONFIG_SATA_AHCI=m  (cannot select=y)
> > 
> > That's as expected.  CONFIG_ATA value controls CONFIG_SATA_AHCI
> > possible values.
> > 
> > > 
> > > Then 2.6.34.[01] (probably 2 also) will boot.
> > > Make silentoldconfig with this .config and see
> > > that 2.6.35 will not boot.
> > 
> > So with CONFIG_ATA=m and CONFIG_SATA_AHCI=m, does 2.6.34-git4 boot
> > but 2.6.34-git5 fails to boot?
> 
> Yes, that is exactly correct.

OK, I built and booted 2.6.34-git4 and -git5 with your .config file
and only default changes for -git5.

They both booted successfully for me on an f11 box.
I am not using dracut, if that matters.

I don't know what to try next.

---
~Randy
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