linux-kernel - Re: linux-next: build failure after merge of the tip tree

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Message-ID: <CA+icZUW_f+bVy=u8mz+9B+sqWodOH-Wb8EKFfZAtBQzXHde-6w@mail.gmail.com>
Date:	Mon, 20 Jan 2014 16:28:05 +0100
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Mike Galbraith <bitbucket@...ine.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, Len Brown <lenb@...nel.org>,
	linux-next <linux-next@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the tip tree

On Mon, Jan 20, 2014 at 2:10 PM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> Hi Sedat,
>
> On Mon, 20 Jan 2014 09:46:55 +0100 Sedat Dilek <sedat.dilek@...il.com> wrote:
>>
>> On Mon, Jan 20, 2014 at 9:42 AM, Sedat Dilek <sedat.dilek@...il.com> wrote:
>> > On Mon, Jan 20, 2014 at 4:51 AM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>> >> On Sat, 18 Jan 2014 10:46:06 +0100 Mike Galbraith <bitbucket@...ine.de> wrote:
>> >>>
>> >>> I hope it doesn't look quite like that, next-20140117 is -ENOBOOT on
>> >>> Q6600 box.  See below for an alternative.
>> >>>
>> >>> idle: kill unnecessary mwait_idle() resched IPIs
>> >>
>> >> OK, so despite even further discussion, I have applied this as a merge
>> >> fix patch for today.  Let me know when it is all sorted out.
>> >>
>> >
>> > Where is this fix?
>> > ( Browsing Linux-next remote GIT repository online. )
>> > 2x NOPE for me.
>> >
>> > - Sedat -
>> >
>> > [1] http://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/log/?id=next-20140120&qt=grep&q=mwait_idle
>> > [2] http://git.kernel.org/cgit/linux/kernel/git/sfr/next-fixes.git
>> >
>>
>> Hmmm... Found this in Next/merge.log
>>
>> +$ git am -3 ../patches/0001-x86-idle-mwait_idle-merge-update.patch
>> +Applying: idle: kill unnecessary mwait_idle() resched IPIs
>> +$ git reset HEAD^
>> +Unstaged changes after reset:
>> +M arch/x86/include/asm/processor.h
>> +M arch/x86/kernel/process.c
>
> You missed the next three lines:
>
> $ git add -A .
> $ git commit -v -a --amend
> [master 65d9a14a9a41] Merge remote-tracking branch 'tip/auto-latest'
>

[ I was absent for a while from Linux-next, so I am asking for clarification. ]
[ I might be wrong. ]

What does that mean?
AFAICS you applied an important fix by yourself on top of tip/auto-latest?

>> Is this a local patch not shipped in the Linux-next (remote) GIT repo?
>> Why is this not in your next-fixes GIT repo?
>
> Its part of the conflict resolution for the merge of the tip tree.  It
> cannot go into my fixes tree - that is for fixes to bugs in Linus' tree
> until they are integrated there.  The tip and pm trees are both fine on
> their own, but combined they don't.  So this fix has to go into the actual
> merge commit for the merge of the later tree.   When Linus' merges the
> later of these trees he will also need this fix - or a better one - which
> is what is still under discussion.
>

I was asking in general about next-fixes to have a "bootable" (aka
working) Linux-next kernel.

You see next-fixes as a place to fix Linus-tree, seriously?

The question here in this special case seems to be a "logical"
(not-working-together) problem between tip and pm.

And we are in a merge-window...

>> A bit confused about your -next policies,
>
> Any better?
>

Not really.
You should clarify on what you are doing in your next-fixes tree.
Your daily report for Linux-next releases even does not mention next-fixes.

Looking through my INBOX Thierry had the initial idea of "fixes for
linux-next" when you were on vacation and he took over maintainership.

- Sedat -
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