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[2a02:3100:b162:c701:4960:a998:3de8:2fce]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49fef60da94sm102924275e9.4.2026.09.26.09.19.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 26 Sep 2026 09:19:56 -0700 (PDT) Date: Sat, 26 Sep 2026 18:19:54 +0200 From: Karl Mehltretter To: Muchun Song Cc: Russell King , linux-arm-kernel@lists.infradead.org, Oscar Salvador , Andrew Morton , David Hildenbrand , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] ARM: mm: align hugetlb mappings to the huge page size Message-ID: References: <20260901085740.66283-1-kmehltretter@gmail.com> <5AB6FE85-4CB9-41EF-A700-BC5E071F29F5@linux.dev> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <5AB6FE85-4CB9-41EF-A700-BC5E071F29F5@linux.dev> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260926_091959_419185_29962E8E X-CRM114-Status: GOOD ( 11.71 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Sep 24, 2026 at 04:41:30PM +0100, Muchun Song wrote: > > Fixes: 7bd3f1e1a9ae ("mm: make hugetlb mappings go through mm_get_unmapped_area_vmflags") > > Cc: stable@vger.kernel.org > > Assisted-by: LLM > > Signed-off-by: Karl Mehltretter > > Besides 32-bit Arm, the same regression appears to affect MIPS and > SuperH: both support HugeTLB and provide custom arch_get_unmapped_area*() > implementations that only enforce cache-colouring alignment, not the > hstate’s huge-page alignment. > > Acked-by: Muchun Song Hi Muchun, Thanks for the ack. I've now submitted the patch to Russell's patch tracker: https://www.armlinux.org.uk/developer/patches/viewpatch.php?id=9524/1 I'll also take a look at the MIPS and SuperH cases you mentioned. Karl