Bug 14936

References : http://marc.info/?l=linux-kernel&m=126169372613898&w=4

On Tuesday 29 December 2009, Gene Heskett wrote:
> On Tuesday 29 December 2009, Rafael J. Wysocki wrote:
> >This message has been generated automatically as a part of a report
> >of recent regressions.
> >
> >The following bug entry is on the current list of known regressions
> >from 2.6.32.  Please verify if it still should be listed and let me know
> >(either way).
> >
> >
> >Bug-Entry    : http://bugzilla.kernel.org/show_bug.cgi?id=14936
> >Subject              : kernel BUG at fs/ext4/inode.c:1063 if attempted to
> use non-ext4
> > partition with ext4 Submitter       : Gene Heskett
> <gene.heskett@verizon.net>
> >Date         : 2009-12-26 14:13 (4 days old)
> >References   : http://marc.info/?l=linux-kernel&m=126183682330809&w=4
> >               http://marc.info/?l=linux-kernel&m=126169372613898&w=4
> >
> I would assume its still valid.  Even though I have rebuilt 2.6.33-rc2 3 
> times now, it is so unstable, and so much stuff doesn't "Just Work" that I 
> haven't rebooted to it, or to 2.6.32.2 in about a week now.  USB and 
> bluetooth are somewhat busted in 2.6.32.2.  2.6.32 final seems bulletproof 
> here.  The first thing that pops its ugly head up during either a 2.6.32.2, 
> or a 2.6.33-rc2 boot is that it cannot find the firmware patch that is 
> sitting in /lib/firmware for my phenom X4 cpu.  The load attempt, it looks 
> like, has been moved forward in the boot cycle, before it has actually able 
> to access a file by the /lib/firmware path known after the filesystems are 
> mounted.  And a make xconfig no longer has the ability to edit the firmware 
> inclusions in the kernel, so that is 2 bugs even before we get to the 
> numerous oopsen that will bring it down in 15 minutes or so.

*** Bug 14911 has been marked as a duplicate of this bug. ***

On Tuesday 29 December 2009, tytso@mit.edu wrote:
> On Tue, Dec 29, 2009 at 04:10:01PM +0100, Rafael J. Wysocki wrote:
> > 
> > Bug-Entry   : http://bugzilla.kernel.org/show_bug.cgi?id=14936
> > Subject             : kernel BUG at fs/ext4/inode.c:1063 if attempted to
> use non-ext4 partition with ext4
> > Submitter   : Gene Heskett <gene.heskett@verizon.net>
> > Date                : 2009-12-26 14:13 (4 days old)
> > References  : http://marc.info/?l=linux-kernel&m=126183682330809&w=4
> >               http://marc.info/?l=linux-kernel&m=126169372613898&w=4
> 
> Bisected to commit d21cd8, and reverting this commit seems to fix the
> problem.  The problem appeared between -rc1 and -rc2.  It was a fix
> that was pushed as part of a quota/ext4 fixes.  For more information:
> 
> http://marc.info/?l=linux-ext4&m=126197233225936&w=2
> 
> I will take a look at this to see if I can find an easy fix;
> otherwise, we'll probably want to revert commit d21cd8 before -rc3.

Handled-By : Theodore Ts'o <tytso@mit.edu>
Patch : http://patchwork.kernel.org/patch/70282/

On Wednesday 30 December 2009, tytso@mit.edu wrote:
> On Tue, Dec 29, 2009 at 11:57:12AM -0500, tytso@MIT.EDU wrote:
> > On Tue, Dec 29, 2009 at 04:10:01PM +0100, Rafael J. Wysocki wrote:
> > > 
> > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=14936
> > > Subject           : kernel BUG at fs/ext4/inode.c:1063 if attempted to
> use non-ext4 partition with ext4
> > > Submitter : Gene Heskett <gene.heskett@verizon.net>
> > > Date              : 2009-12-26 14:13 (4 days old)
> > > References        :
> http://marc.info/?l=linux-kernel&m=126183682330809&w=4
> > >             http://marc.info/?l=linux-kernel&m=126169372613898&w=4
> > 
> > Bisected to commit d21cd8, and reverting this commit seems to fix the
> > problem.  The problem appeared between -rc1 and -rc2.  It was a fix
> > that was pushed as part of a quota/ext4 fixes.  For more information:
> > 
> > http://marc.info/?l=linux-ext4&m=126197233225936&w=2
> > 
> > I will take a look at this to see if I can find an easy fix;
> > otherwise, we'll probably want to revert commit d21cd8 before -rc3.
> 
> I'm working on a fix, and have a proposed patch.  See the thread on
> linux-ext4 here:
> 
> http://marc.info/?l=linux-kernel&m=126219515024315&w=2
> 
> This patch also fixes the dq_claim_space kerneloops problem as
> well....

On Thursday 31 December 2009, tytso@mit.edu wrote:
> On Wed, Dec 30, 2009 at 10:52:12PM +0100, Rafael J. Wysocki wrote:
> > > I'm working on a fix, and have a proposed patch.  See the thread on
> > > linux-ext4 here:
> > > 
> > > http://marc.info/?l=linux-kernel&m=126219515024315&w=2
> > > 
> > > This patch also fixes the dq_claim_space kerneloops problem as
> > > well....
> > 
> > Thanks, I've added your patch to the Bugzilla entry.
> 
> This patch has been merged to mainline.  I'm working on improving
> things so that we don't lose performance by unnecessarily forcing
> delalloc blocks out to disk when the (wildly overestimated) number of
> required metadata blocks approaches the user's remaining quota or
> remaining free space on disk, but the fundamental fix is in mainline.
> 
> (The performance hit was something I knew about when I pushed the
> patch to Linus, but after discussing things with Eric Sandeen, we
> figured that for users who were converting from ext3, which didn't
> have delayed allocation support at all, even with the performance hit
> when the user approached the quota limit, ext4 with delalloc+quota was
> still better than ext3 --- and I wanted a fix in mainline ASAP.
> Fortunately, it's not going to be that hard make the required metadata
> much more accurate.)

Fixed by commit 0637c6f4135f592f094207c7c21e7c0fc5557834 .