linux-kernel - Re: [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell"

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Date:   Wed, 5 Jan 2022 02:07:42 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "David S. Miller" <davem@...emloft.net>,
        Ard Biesheuvel <ardb@...nel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Al Viro <viro@...iv.linux.org.uk>, llvm@...ts.linux.dev
Subject: Re: [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree
 -v1: Eliminate the Linux kernel's "Dependency Hell"


* Ingo Molnar <mingo@...nel.org> wrote:

> 
> * Nathan Chancellor <nathan@...nel.org> wrote:
> 
> > > I.e. I think the bug was simply to make main.c aware of the array, now 
> > > that the INIT_THREAD initialization is done there.
> > 
> > Yes, that seems right.
> > 
> > Unfortunately, while the kernel now builds, it does not boot in QEMU. I 
> > tried to checkout at 9006a48618cc0cacd3f59ff053e6509a9af5cc18 to see if I 
> > could reproduce that breakage there but the build errors out at that 
> > change (I do see notes of bisection breakage in some of the commits) so I 
> > assume that is expected.
> 
> Yeah, there's a breakage window on ARM64, I'll track down that 
> bisectability bug.

I haven't fixed this ARM64 bisection breakage yet, but I've integrated & 
backmerged all the other fixes and changes, and pushed it out to the WIP 
branch:

    # 1755441e323b per_task: Implement single template to define 'struct task_struct_per_task' fields and offsets

    git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git sched/headers

Let me know if there's anything missing or if there's a new breakage.

This is pretty close to what will be -v2.

Thanks,

	Ingo