linux-kernel - Re: [GIT PULL] Core block IO bits for 2.6.39

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Date:	Fri, 25 Mar 2011 09:37:57 +0100
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	Jens Axboe <jaxboe@...ionio.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Chris Mason <chris.mason@...cle.com>
Subject: Re: [GIT PULL] Core block IO bits for 2.6.39 - early Oops

On 2011.03.25 at 08:23 +0100, Jens Axboe wrote:
> On 2011-03-24 22:41, Markus Trippelsdorf wrote:
> > On 2011.03.24 at 22:01 +0100, Jens Axboe wrote:
> >> On 2011-03-24 21:06, Markus Trippelsdorf wrote:
> >>> On 2011.03.24 at 20:57 +0100, Jens Axboe wrote:
> >>>>
> >>>> OK, still a data point. What was the last -git kernel you used?
> >>>
> >>> This one was the last and gave me no problems:
> >>>
> >>> commit b81a618dcd3ea99de292dbe624f41ca68f464376
> >>> Merge: 2f284c8 a9712bc
> >>> Author: Linus Torvalds <torvalds@...ux-foundation.org>
> >>> Date:   Wed Mar 23 20:51:42 2011 -0700
> >>>
> >>>     Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
> >>
> >> Puzzling... Poking at straws here so far. Does this make any difference
> >> whatsoever?
> > 
> > I will test your patch later.
> > 
> > Git-bisect gave me this result thus far:
> > 
> > 9026e521c0da0731eb31f9f9022dd00cc3cd8885 is bad
> > 82f04ab47e1d94d78503591a7460b2cad9601ede is good
> > 
> > When I continue the bisection with 4345caba340f051e10847924fc078ae18ed6695c
> > the system will start normally, but it then silently corrupts my xfs
> > partitions. And on next (re)boot I get this (only fixable with
> > xfs_repair):
> > 
> How confident are you in those bisection results? Not trying to put you
> on the spot, just wondering whether you tested and it's completely
> consistent, or whether it was a one-off.

Just double checked and 82f04ab47e1d94d78503591a7460b2cad9601ede is also
bad. It just silently corrupts the file system (without a BUG) and I
didn't notice.
So back to square one. 

How can I tell git-bisect just to try the commits in the block merge and
not to take wild swings in history?

-- 
Markus
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