From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 A362A230264; Wed, 9 Jul 2025 17:37:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752082665; cv=none; b=KGyqcBiqnJdDHk+u389fib2yvYABjoF3FbW8rH2+WgeWSP+HkTRyxhQrd5b3Mg1limF0TO22XX/s9dCtLu0kFaR8oUTA0LUfvv/Ci7NHBbQdp2vGyG87l5eVMVD+RSSqMVLPhllciYMpdfupqB5K4h80MdCCyyOOGrnoIAtWWfo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752082665; c=relaxed/simple; bh=UrMsQCIJDhTzvXs4RqAiNo8Cvl8Hxt1Ziw4xZzCivP8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=FDbryEw3HqZnd91v1WRaaVRt1fdz+u15QUwtnikHHSfH2XzsithFTxZxUHf68whWrCJ73CXpBG3HdAO96d+OJjtUC4yfJvz5QtP7gmBMJUmPpkvw8kxRHY2gLBx0a5+FJVAQHlUAJjZ/JsXMJe8c2yp/1VAHINupeLLUPR+s5Zo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QLHtwoBR; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="QLHtwoBR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CC82AC4CEF4; Wed, 9 Jul 2025 17:37:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1752082665; bh=UrMsQCIJDhTzvXs4RqAiNo8Cvl8Hxt1Ziw4xZzCivP8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=QLHtwoBRBDQXByIwztN3KSGJHjSq3oNBskn8+BqLMMhqdtnTR0UyUptamUZIYxGzS 05rD14LKHLKqTeimzJ2y929jnGWklGIhtvQp6ocTIgZI3vagwr61joiQn1TPHnUZ89 ycdYhIM+lzyzlbzjyDSkxSyKQ6uYEu5lkXBMrDbs3vtdGAMwESE30BKXvvCDPaVQUt W7dT2TuhGDf9YXB8WzyeFU2zclFXHgGlkoBe4ce2jqo0L70OLsP/cbUwRrE/xtKpDK byWECBlTs4hfYQ4Le26gLoYuh+ujVmaP2G9fkzWyxgJrH2kUpRW7Z/X8wfGAOFJC6w 5tyz4QMbmlGCg== Date: Wed, 9 Jul 2025 13:37:40 -0400 From: Sasha Levin To: "Eric W. Biederman" Cc: patches@lists.linux.dev, stable@vger.kernel.org, Mario Limonciello , Nat Wittstock , Lucian Langa , "Rafael J . Wysocki" , rafael@kernel.org, pavel@ucw.cz, len.brown@intel.com, linux-pm@vger.kernel.org, kexec@lists.infradead.org Subject: Re: [PATCH AUTOSEL 6.15 6/8] PM: Restrict swap use to later in the suspend sequence Message-ID: References: <20250708000215.793090-1-sashal@kernel.org> <20250708000215.793090-6-sashal@kernel.org> <87ms9esclp.fsf@email.froward.int.ebiederm.org> <87tt3mqrtg.fsf@email.froward.int.ebiederm.org> <87ms9dpc3b.fsf@email.froward.int.ebiederm.org> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <87ms9dpc3b.fsf@email.froward.int.ebiederm.org> On Wed, Jul 09, 2025 at 11:23:36AM -0500, Eric W. Biederman wrote: >There is no indication that the kexec code path has ever been exercised. > >So this appears to be one of those changes that was merged under >the banner of "Let's see if this causes a regression". > >To the original authors. I would have appreciated it being a little >more clearly called out in the change description that this came in >under "Let's see if this causes a regression". > >Such changes should not be backported automatically. They should be >backported with care after the have seen much more usage/testing of >the kernel they were merged into. Probably after a kernel release or >so. This is something that can take some actual judgment to decide, >when a backport is reasonable. I'm assuming that you also refer to stable tagged patches that get "automatically" picked up, right? We already have a way to do what you suggest: maintainers can choose not to tag their patches for stable, and have both their subsystem and/or individual contributions ignored by AUTOSEL. This way they can send us commits at their convenience. There is one subsystem that is mostly doing that (XFS). The other ones are *choosing* not to do that. -- Thanks, Sasha