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From: Ingo Molnar <mingo@kernel.org>
To: Nathan Chancellor <nathan@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"David S. Miller" <davem@davemloft.net>,
	Ard Biesheuvel <ardb@kernel.org>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Jonathan Corbet <corbet@lwn.net>,
	Al Viro <viro@zeniv.linux.org.uk>,
	llvm@lists.linux.dev
Subject: Re: [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell"
Date: Wed, 5 Jan 2022 01:40:32 +0100	[thread overview]
Message-ID: <YdTpAJxgI+s9Wwgi@gmail.com> (raw)
In-Reply-To: <YdSI9LmZE+FZAi1K@archlinux-ax161>


* Nathan Chancellor <nathan@kernel.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.

Decoupling thread_info and task_struct incrementally, so that it bisects 
cleanly on all architectures, was always a big challenge. :-/

> There is no output, even with earlycon, so it seems like something is 
> going wrong in early boot code. I am not very familiar with the SCS code 
> so I will see if I can debug this with gdb later (I'll try to see if it 
> is reproducible with GCC as well; as Nick mentions, there is support 
> being added to it and I don't mind building from source).

Just to make sure: with SCS disabled the same kernel boots fine?

> Sure thing, I will continue to follow this and test it as much as I can 
> to make sure everything continues to work well!

Thank you!

	Ingo

  parent reply	other threads:[~2022-01-05  0:40 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-02 21:57 [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Ingo Molnar
2022-01-03 10:11 ` Greg Kroah-Hartman
2022-01-03 11:12   ` Ingo Molnar
2022-01-03 13:46     ` Greg Kroah-Hartman
2022-01-03 16:29       ` Ingo Molnar
2022-01-10 10:28         ` Peter Zijlstra
2022-01-04 14:10     ` [PATCH] per_task: Remove the PER_TASK_BYTES hard-coded constant Ingo Molnar
2022-01-04 15:14       ` Andy Shevchenko
2022-01-04 23:27         ` Ingo Molnar
2022-01-04 17:51     ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Arnd Bergmann
2022-01-05  0:05       ` Ingo Molnar
2022-01-05  1:37         ` Arnd Bergmann
2022-01-05  9:37       ` Andy Shevchenko
2022-01-04 14:05   ` [PATCH] per_task: Implement single template to define 'struct task_struct_per_task' fields and offsets Ingo Molnar
2022-01-03 13:54 ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Kirill A. Shutemov
2022-01-04 10:54   ` Ingo Molnar
2022-01-04 13:34     ` Greg Kroah-Hartman
2022-01-04 13:54       ` [PATCH] headers/uninline: Uninline single-use function: kobject_has_children() Ingo Molnar
2022-01-04 15:09         ` Greg Kroah-Hartman
2022-01-04 15:14           ` Greg Kroah-Hartman
2022-01-05  0:11             ` Ingo Molnar
2022-01-05 15:23               ` Greg Kroah-Hartman
2022-01-06 11:26                 ` Ingo Molnar
2022-01-03 17:54 ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Nathan Chancellor
2022-01-04 10:47   ` Ingo Molnar
2022-01-04 10:56     ` [DEBUG PATCH] DO NOT MERGE: Enable SHADOW_CALL_STACK on GCC builds, for build testing Ingo Molnar
2022-01-04 11:02     ` [PATCH] headers/deps: dcache: Move the ____cacheline_aligned attribute to the head of the definition Ingo Molnar
2022-01-04 15:05       ` kernel test robot
2022-01-04 17:51       ` Nathan Chancellor
2022-01-05  0:20         ` Ingo Molnar
2022-01-05  0:26           ` [PATCH] headers/deps: Attribute placement fixes for Clang & GCC Ingo Molnar
2022-01-04 11:19     ` [TREE] "Fast Kernel Headers" Tree WIP/development branch Ingo Molnar
2022-01-04 17:25     ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Nick Desaulniers
2022-01-05  0:43       ` Ingo Molnar
2022-01-04 17:50     ` Nathan Chancellor
2022-01-05  0:35       ` [PATCH] x86/kbuild: Enable CONFIG_KALLSYMS_ALL=y in the defconfigs Ingo Molnar
2022-01-08 21:57         ` [tip: x86/build] " tip-bot2 for Ingo Molnar
2022-01-05  0:40       ` Ingo Molnar [this message]
2022-01-05  1:07         ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Ingo Molnar
2022-01-05  5:20           ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel'\''s "Dependency Hell Paul Zimmerman
2022-01-05 21:42           ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Nathan Chancellor
2022-01-08 10:32             ` [PATCH] headers/deps: Add header dependencies to .c files: <linux/ptrace_api.h> Ingo Molnar
2022-01-08 11:08             ` [PATCH] FIX: headers/deps: uapi/headers: Create usr/include/uapi symbolic link Ingo Molnar
2022-01-08 11:18             ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Ingo Molnar
2022-01-08 11:38             ` [PATCH] x86/bitops: Remove unused __sw_hweight64() assembly implementation Ingo Molnar
2022-01-08 11:49             ` [PATCH 0000/2297] [ANNOUNCE, RFC] "Fast Kernel Headers" Tree -v1: Eliminate the Linux kernel's "Dependency Hell" Ingo Molnar
2022-01-08 12:17               ` Ingo Molnar
2022-01-10 20:03               ` Nathan Chancellor
2022-01-10 20:05                 ` Nathan Chancellor
2022-01-05 22:33         ` Nathan Chancellor
2022-01-08 15:16       ` Ingo Molnar
2022-01-07  0:29     ` Nathan Chancellor
2022-01-08 11:54       ` Ingo Molnar
2022-01-04 12:36 ` Willy Tarreau
2022-01-04 16:05 ` Andy Shevchenko
2022-01-04 16:18 ` Andy Shevchenko
2022-01-15  0:42 ` Paul E. McKenney

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