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Mon, 29 Dec 2025 20:41:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767040890; bh=GZ+1KKfaWUAEcxuxIpgqLNo0r9p6egS5f7P9gKbzco0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=QSRG7hvxBwQ796IfjClt8gqnHeEg9FV3z8mjQpYJOHPTnhcOUr+/cnAT4eS+xWhcw Ry/Yz2NJZ5DA5UhE7xlqILcigyZGgJoMpuIuB0HMrcb7Ey7m1vgaCm9xAfhtLSz4bn sbTYmz31UIAeLJcFVaXN7OOZdttuepR+uxZUfFaBQo541btafW7mlmwhzqU1GM58MY M1UJdK4hRPnph8apO7+VSUObxlZC5iMC2GiurW2KC0C0UTBxkCWb1C8TBghjVP78ye lD82sIfiiyao8xdsYvHQc2rwHPPIbHwa6sC1CjLJJW0iqFCco3pfM0oBcDvtUsNP3Z l3grsjsZqTnwg== Date: Mon, 29 Dec 2025 15:41:29 -0500 From: Sasha Levin To: "Christophe Leroy (CS GROUP)" Cc: Andrew Morton , Sourabh Jain , linux-kernel@vger.kernel.org, Borislav Petkov , Heiko Carstens , Ingo Molnar , Madhavan Srinivasan , Michael Ellerman , Muchun Song , Oscar Salvador , Thomas Gleixner , Vasily Gorbik , linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, x86@kernel.org, linux-riscv@lists.infradead.org, "David Hildenbrand (Red Hat)" , "Ritesh Harjani (IBM)" Subject: Re: [PATCH v7] mm/hugetlb: ignore hugepage kernel args if hugepages are unsupported Message-ID: References: <20251224115524.1272010-1-sourabhjain@linux.ibm.com> <20251228143533.33e2be2d6282d036f55e12cb@linux-foundation.org> <398ca47d-19d4-4b26-98db-2bf283b6b0cb@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <398ca47d-19d4-4b26-98db-2bf283b6b0cb@kernel.org> On Mon, Dec 29, 2025 at 07:35:18PM +0100, Christophe Leroy (CS GROUP) wrote: > > >Le 28/12/2025 à 23:35, Andrew Morton a écrit : >>On Wed, 24 Dec 2025 17:25:24 +0530 Sourabh Jain wrote: >> >>>Note for backporting: This fix is a partial retrieval of the commit >>>mentioned in the Fixes tag. It is only valid once the change referenced >>>by the Depends-on tag is present. When backporting this patch, the >>>commit mentioned in the Depends-on tag must be included first. >>> >>>Link: https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F20250121150419.1342794-1-sourabhjain%40linux.ibm.com%2F&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7C93a8f925fc024ff9c3fe08de46616c3b%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639025581404027066%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=3iVUdaMBWhExKkDiV%2BBfYufPTKva1dVikhyQShOq7mc%3D&reserved=0 [1] >>>Link: https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F20250128043358.163372-1-sourabhjain%40linux.ibm.com%2F&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7C93a8f925fc024ff9c3fe08de46616c3b%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639025581404053206%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=GamDe2R87SdpFurnj9Cmt9wOQtkGLgIO1z7nl5QPxgY%3D&reserved=0 [2] >>>Fixes: c2833a5bf75b ("hugetlbfs: fix changes to command line processing") >>>Depends-on: 2354ad252b66 ("powerpc/mm: Update default hugetlb size early") >> >>This will be the first "Depends-on:" in history. Which is a hint that >>we're doing something wrong. This innovation will surely fool any >>downstream automation. Let's use existing tools if possible. > >What do you mean by "first in history" ? Do you mean it's never been >used before ? As far as I can see it has been used several times >already. First one was in 2014 with commit a0855054e59b ("iwlwifi: >dvm: drop non VO frames when flushing") > >Sasha, do tools use it ? The standard way to annotate dependencies is outlined in the docs: To send additional instructions to the stable team, use a shell-style inline comment to pass arbitrary or predefined notes: Specify any additional patch prerequisites for cherry picking: Cc: # 3.3.x: a1f84a3: sched: Check for idle Cc: # 3.3.x: 1b9508f: sched: Rate-limit newidle Cc: # 3.3.x: fd21073: sched: Fix affinity logic Cc: # 3.3.x Signed-off-by: Ingo Molnar The tag sequence has the meaning of: git cherry-pick a1f84a3 git cherry-pick 1b9508f git cherry-pick fd21073 git cherry-pick My tools don't look at Depends-on: and I don't think that Greg's tools do that either. -- Thanks, Sasha