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b=1QL8f41Rcexjp5HR46WOg9kxNLNocZNvvEbYU/Auokx8zqa8xA3O5RiDLBnxGF9E4 y/C4Lqpm2r02rxa6co5a+BWXUIOB+8WAgimhq2VUTMXekY8F7nwfHvPj/swOESZT8s NHNWrvdZfY2vDa1FW8ZegBx08PWoBohUIHQY3dNI= Date: Mon, 22 Dec 2025 18:30:55 -0800 From: Andrew Morton To: SeongJae Park Cc: "David Hildenbrand (Red Hat)" , "Ritesh Harjani (IBM)" , Sourabh Jain , Borislav Petkov , Christophe Leroy , 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, linux-kernel@vger.kernel.org, Sasha Levin Subject: Re: [PATCH v6] mm/hugetlb: ignore hugepage kernel args if hugepages are unsupported Message-Id: <20251222183055.88c3cc1f0705c1dc29c7f011@linux-foundation.org> In-Reply-To: <20251223013045.4579-1-sj@kernel.org> References: <20251221104907.032abf56c67f3e50c9c94e31@linux-foundation.org> <20251223013045.4579-1-sj@kernel.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: 77dnftg581461zckbgm3bmexo36a5bro X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: DC473C0007 X-Rspam-User: X-HE-Tag: 1766457057-441451 X-HE-Meta: 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 ZCysfFLW F3beTgzEhfND63unGr2BrVBQkaeoOYJ4jHA9R3xaSoO3JeSfbJloDvFYS9xbgFShdrBtkIVZOaxIFA7gBnm5E89oPy1PrRQOWZ1jBnZVq+UlfbOupn/qCsdCRq6bnW5woabheW4pVJkuH/nz5maIOcIUWeEeZUouHVId0vRnhTWOoFfOQk+5Ph0Spa8C4ZjDP8/K/M7ohvQRduBtfPP8N6uy9pUOu9I8EKOcBQyERlPYTGrQz4r49d1MifK1eYTOs4NBxIwYbWL9vB2HzJciIn9a9XhwyN5P0iiqbC6CbamqEt4R/26JbJPgjEOslSRmYBBO7vpKY4xtsbRKgBnvzabyeiBO3h23G6Wvc7x9ZyfzVjoLMuQUWJQit8l8Nzke2ZL5qbQQ7O54bJ9Bs8dQ+F6/dGA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, 22 Dec 2025 17:30:44 -0800 SeongJae Park wrote: > On Sun, 21 Dec 2025 10:49:07 -0800 Andrew Morton wrote: > > > On Sun, 21 Dec 2025 10:22:44 +0100 "David Hildenbrand (Red Hat)" wrote: > > > > > > > > > > My main concern was - > > > > A fixes tag means it might get auto backported to stable kernels too, > > > > > > Not in the MM world -- IIRC. I think there is the agreement, that we > > > decide what should go into stable and what not. > > > > > > Andrew can correct me if my memory is wrong. > > > > Yes, -stable maintainers have been asked to only backport patches where > > the MM developers asked for that, with cc:stable. There may be > > slipups, but as far as I know this is working. > > > > I don't actually know how they determine which patches need this > > special treatment. Pathname? Signed-off-by:akpm? > > I guess it is pathname, based on ignore_list file [1] of stable-queue repo. > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/ignore_list#n16 > Oh, that's a bit sad. - other trees sometimes mess with mm/ and they probably aren't aware that they need an explicit cc:stable. - misses drivers/block/zram and probably various other things that the MM team maintains. Oh well, I guess simple mm/* coverage is good enough. But I do worry a little that useful fixes coming into mm/ via other trees without cc:stable will get missed.