linux-kernel - Re: Stupid linux-next git question...

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Message-Id: <20130801095708.b43c432b2bf914827fd45d79@canb.auug.org.au>
Date:	Thu, 1 Aug 2013 09:57:08 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Valdis Kletnieks <Valdis.Kletnieks@...edu>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Stupid linux-next git question...

Hi Valdis,

On Wed, 31 Jul 2013 18:58:13 -0400 Valdis Kletnieks <Valdis.Kletnieks@...edu> wrote:
>
> OK... So I have (as usual) found some issues in linux-next, so I'm looking at 3
> bisects.  I already know that bisecting between (say) next-20130715 and
> next-20130730 won't work, but bisecting between the 3.11-rc1 base of
> next-20130715 and next-20130730 *will* work.
> 
> Question 1:
> 
> Does bisecting between "the HEAD of Linus's tree when a given next- is built"
> and "some later next-" work? (basically, I know that anything in Linus's tree
> as of -0715 is 'Good', so I'd rather start from there than from 3.11-rc1 to
> save several bisects).

Yes, because that point only moves forward (obviously).

> Question 2:
> 
> If that works, how do I determine the commit ID to feed to 'git bisect good'?
> I *hope* this in Next/merge.log is the magic I'm looking for:
> 
> $ git reset --hard stable
> HEAD is now at 6c504ec Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
> Merging origin/master (5ae90d8 Linux 3.11-rc3)

Yes, that, or if you look in Next/SHA1s, my start point in Linus' tree is
labelled "origin".  Also, it is the "stable" branch in the current
linux-next tree (which is moved forward each day).

These are not stupid questions, by the way :-)
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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