From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from verein.lst.de (verein.lst.de [213.95.11.211])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by smtp.subspace.kernel.org (Postfix) with ESMTPS id A495B280A52;
	Tue, 29 Apr 2025 12:35:12 +0000 (UTC)
Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.95.11.211
ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;
	t=1745930114; cv=none; b=JFwTCJmo+VvLLK/nTtMaY1XkDJgKAxbUcg9puFZ8ySVag67XllV55l0h4MIIMLH4PSa3JZg25CwMZMyOYg+UH1lnSTe7+BuszaRnlYa0gf7+2oj2LxHxCdDn+0I5RjuGg0DWZCOmkrZST8Hni379SkU+POV8LN2b1xk75she8vM=
ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org;
	s=arc-20240116; t=1745930114; c=relaxed/simple;
	bh=YA9K64SGJNboEqUy75D/7syj4zAm+0ahG0X4Cz9zGlk=;
	h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version:
	 Content-Type:Content-Disposition:In-Reply-To; b=GQNj/YK9l86LH6lCQTW7/MlwxLUJN0QVo1e+qJgWBnejwDysuKhbunXsUxNeO5WfquxSpoL0WwDyZ4nWicKaBjSWAsTlIBAAP+3zIgbs7X8oYhm6IEULcJVb/7AsqrDT9ONOHQMtfen8x2RdALnXYEs3qHphGdsrsOnsVqtetNI=
ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lst.de; spf=pass smtp.mailfrom=lst.de; arc=none smtp.client-ip=213.95.11.211
Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lst.de
Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lst.de
Received: by verein.lst.de (Postfix, from userid 2407)
	id DBA7F68AA6; Tue, 29 Apr 2025 14:35:04 +0200 (CEST)
Date: Tue, 29 Apr 2025 14:35:04 +0200
From: Christoph Hellwig <hch@lst.de>
To: chenlinxuan@uniontech.com
Cc: Keith Busch <kbusch@kernel.org>, Jens Axboe <axboe@kernel.dk>,
	Christoph Hellwig <hch@lst.de>, Sagi Grimberg <sagi@grimberg.me>,
	Andrew Morton <akpm@linux-foundation.org>,
	Yishai Hadas <yishaih@nvidia.com>, Jason Gunthorpe <jgg@ziepe.ca>,
	Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>,
	Kevin Tian <kevin.tian@intel.com>,
	Alex Williamson <alex.williamson@redhat.com>,
	Peter Huewe <peterhuewe@gmx.de>,
	Jarkko Sakkinen <jarkko@kernel.org>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Nathan Chancellor <nathan@kernel.org>,
	Nicolas Schier <nicolas.schier@linux.dev>,
	Nick Desaulniers <nick.desaulniers+lkml@gmail.com>,
	Bill Wendling <morbo@google.com>,
	Justin Stitt <justinstitt@google.com>,
	Vlastimil Babka <vbabka@suse.cz>,
	Suren Baghdasaryan <surenb@google.com>,
	Michal Hocko <mhocko@suse.com>,
	Brendan Jackman <jackmanb@google.com>,
	Johannes Weiner <hannes@cmpxchg.org>, Zi Yan <ziy@nvidia.com>,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	Peter Zijlstra <peterz@infradead.org>,
	"Paul E. McKenney" <paulmck@kernel.org>,
	Boqun Feng <boqun.feng@gmail.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	Andrey Konovalov <andreyknvl@gmail.com>,
	Juergen Gross <jgross@suse.com>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org,
	"H. Peter Anvin" <hpa@zytor.com>, linux-nvme@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	kvm@vger.kernel.org, virtualization@lists.linux.dev,
	linux-integrity@vger.kernel.org, linux-kbuild@vger.kernel.org,
	llvm@lists.linux.dev, Winston Wen <wentao@uniontech.com>,
	kasan-dev@googlegroups.com, xen-devel@lists.xenproject.org,
	Changbin Du <changbin.du@intel.com>,
	Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH RFC v3 0/8] kernel-hacking: introduce
 CONFIG_NO_AUTO_INLINE
Message-ID: <20250429123504.GA13093@lst.de>
References: <20250429-noautoinline-v3-0-4c49f28ea5b5@uniontech.com>
Precedence: bulk
X-Mailing-List: llvm@lists.linux.dev
List-Id: <llvm.lists.linux.dev>
List-Subscribe: <mailto:llvm+subscribe@lists.linux.dev>
List-Unsubscribe: <mailto:llvm+unsubscribe@lists.linux.dev>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20250429-noautoinline-v3-0-4c49f28ea5b5@uniontech.com>
User-Agent: Mutt/1.5.17 (2007-11-01)

On Tue, Apr 29, 2025 at 12:06:04PM +0800, Chen Linxuan via B4 Relay wrote:
> This series introduces a new kernel configuration option NO_AUTO_INLINE,
> which can be used to disable the automatic inlining of functions.
> 
> This will allow the function tracer to trace more functions
> because it only traces functions that the compiler has not inlined.

This still feels like a bad idea because it is extremely fragile.