From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from fout-b4-smtp.messagingengine.com (fout-b4-smtp.messagingengine.com [202.12.124.147]) (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 56B501F8755 for ; Wed, 8 Oct 2025 06:15:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.12.124.147 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759904109; cv=none; b=ffQtRW6XGFpWNSy7E+nd3wU3fvaGkpt7B/eeuO8HY8pv2BFrFFFWO+U2GoTNOo4Kognw7fetYG3mw9dJeMqYqjIlqFIb4uU5m758YxEi3MCPazG3ELtbAMacUTL5AVDBInm2pAsfk5cIUwvtbK3yCfF2mt/pi4U7HTIW9lIFXOo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759904109; c=relaxed/simple; bh=/ysWvONG/rRVXYMAmJinyLug2h51k7AZJtFHEIsBFSs=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References: MIME-Version:Content-Type; b=SNDVBu9qyDdxBfUxXlau5OKbFqO81Iz8rxI/8Pk0Ij8ESTbN4Nlmd1AGRGUGGwyQppZAHFw92zFj60/sr5pf3eehTCxJcv9jm6A1W/ZPkU9RQi6khbnYJydwx3W+gkEoKV9xOUnENH34UlOS+hqGAIRAcPk+G/cFXRWAFG6oNgg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=linux-m68k.org; spf=none smtp.mailfrom=linux-m68k.org; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b=H4pIYGV1; arc=none smtp.client-ip=202.12.124.147 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=linux-m68k.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux-m68k.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="H4pIYGV1" Received: from phl-compute-10.internal (phl-compute-10.internal [10.202.2.50]) by mailfout.stl.internal (Postfix) with ESMTP id D0D641D000F6; Wed, 8 Oct 2025 02:15:05 -0400 (EDT) Received: from phl-mailfrontend-02 ([10.202.2.163]) by phl-compute-10.internal (MEProxy); Wed, 08 Oct 2025 02:15:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-type:content-type:date:date :feedback-id:feedback-id:from:from:in-reply-to:in-reply-to :message-id:mime-version:references:reply-to:subject:subject:to :to:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm2; t= 1759904105; x=1759990505; bh=OR22NrgfEglb+PpHIQeRBTrbvW1PJ4Cuam0 YJIEfV0I=; b=H4pIYGV1EQNs1jQJwTh4cFbdIOIqDSRbUJOrNMgSNleCr1uaDbz 83gtppMOOi95c+qeZe0RZ6vT582FQQ61PIefr9Q4yZJ310MpqhxVG7cj2kaK7tH4 R6Qtmse+wvoJQAPKfkJ9OxTnb8KM0V04PyvutoH0qntdFmDnVWd7neyq5+6jqhD+ X2UTfd1xSNAAczuhzRZIxIhZ/JTdWQ/iKVgmrMDrjKm4O7fPXgNdTgezoH6zR7yA RiB+X5Ep/bT+FXlCqIvQb94rYcoGzq+kMkVr573/rrsyWX3YSyFjo/X8r6jLI1ZJ qkTnRMoUf9OodVOhWmo9IS3w0f05X0II3dQ== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtdeggddutddvheehucetufdoteggodetrf dotffvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfurfetoffkrfgpnffqhgenuceu rghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujf gurhepfffhvfevufgjkfhfgggtsehttdertddttddvnecuhfhrohhmpefhihhnnhcuvfhh rghinhcuoehfthhhrghinheslhhinhhugidqmheikehkrdhorhhgqeenucggtffrrghtth gvrhhnpeelueehleehkefgueevtdevteejkefhffekfeffffdtgfejveekgeefvdeuheeu leenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpehfth hhrghinheslhhinhhugidqmheikehkrdhorhhgpdhnsggprhgtphhtthhopedvgedpmhho uggvpehsmhhtphhouhhtpdhrtghpthhtoheplhgrnhgtvgdrhigrnhhgsehlihhnuhigrd guvghvpdhrtghpthhtoheprghkphhmsehlihhnuhigqdhfohhunhgurghtihhonhdrohhr ghdprhgtphhtthhopehgvggvrhhtsehlihhnuhigqdhmieekkhdrohhrghdprhgtphhtth hopehorghksehhvghlshhinhhkihhnvghtrdhfihdprhgtphhtthhopehkvghnthdrohhv vghrshhtrhgvvghtsehlihhnuhigrdguvghvpdhrtghpthhtoheprghmrghinhguvgigse houhhtlhhoohhkrdgtohhmpdhrtghpthhtoheprghnnhgrrdhstghhuhhmrghkvghrseho rhgrtghlvgdrtghomhdprhgtphhtthhopegsohhquhhnrdhfvghnghesghhmrghilhdrtg homhdprhgtphhtthhopehiohifohhrkhgvrhdtsehgmhgrihhlrdgtohhm X-ME-Proxy: Feedback-ID: i58a146ae:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 8 Oct 2025 02:15:01 -0400 (EDT) Date: Wed, 8 Oct 2025 17:14:51 +1100 (AEDT) From: Finn Thain To: Lance Yang cc: Andrew Morton , Geert Uytterhoeven , Eero Tamminen , Kent Overstreet , amaindex@outlook.com, anna.schumaker@oracle.com, boqun.feng@gmail.com, ioworker0@gmail.com, joel.granados@kernel.org, jstultz@google.com, leonylgao@tencent.com, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, longman@redhat.com, mhiramat@kernel.org, mingo@redhat.com, mingzhe.yang@ly.com, peterz@infradead.org, rostedt@goodmis.org, senozhatsky@chromium.org, tfiga@chromium.org, will@kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock pointers In-Reply-To: <56784853-b653-4587-b850-b03359306366@linux.dev> Message-ID: <693a62e0-a2b5-113b-d5d9-ffb7f2521d6c@linux-m68k.org> References: <20250909145243.17119-1-lance.yang@linux.dev> <99410857-0e72-23e4-c60f-dea96427b85a@linux-m68k.org> <20251007135600.6fc4a031c60b1384dffaead1@linux-foundation.org> <56784853-b653-4587-b850-b03359306366@linux.dev> Precedence: bulk X-Mailing-List: linux-m68k@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii On Wed, 8 Oct 2025, Lance Yang wrote: > On 2025/10/8 08:40, Finn Thain wrote: > > > > On Tue, 7 Oct 2025, Andrew Morton wrote: > > > >> Getting back to the $Subject at hand, are people OK with proceeding > >> with Lance's original fix? > >> > > > > Lance's patch is probably more appropriate for -stable than the patch I > > proposed -- assuming a fix is needed for -stable. > > Thanks! > > Apart from that, I believe this fix is still needed for the hung task > detector itself, to prevent unnecessary warnings in a few unexpected > cases. > Can you be more specific about those cases? A fix for a theoretical bug doesn't qualify for -stable branches. But if it's a fix for a real bug, I have misunderstood Andrew's question... > > > > Besides those two alternatives, there is also a workaround: > > $ ./scripts/config -d DETECT_HUNG_TASK_BLOCKER > > which may be acceptable to the interested parties (i.e. m68k users). > > > > I don't have a preference. I'll leave it up to the bug reporters (Eero > > and Geert). >