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[99.254.121.117]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-43fb18af1d2sm1066701cf.65.2024.05.23.15.37.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 May 2024 15:37:47 -0700 (PDT) From: Peter Xu To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Thomas Gleixner , Jason Gunthorpe , Andrew Morton , Al Viro , Dave Hansen , Andy Lutomirski , Matthew Wilcox , peterx@redhat.com, Dan Williams , "Kirill A . Shutemov" , Mike Rapoport , Ingo Molnar , Michal Hocko , Alex Williamson , Peter Zijlstra , Suren Baghdasaryan , Borislav Petkov , x86@kernel.org Subject: [PATCH RFC 0/2] mm/x86/pat: Fix two possible issues Date: Thu, 23 May 2024 18:37:43 -0400 Message-ID: <20240523223745.395337-1-peterx@redhat.com> X-Mailer: git-send-email 2.45.0 Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit I'm recently looking at the possibility of mapping PCIe large bars to use huge mappings (just like thp or hugetlb). Then I noticed these only when reading the code. I don't think I'm familiar enough with the whole PAT system, however I figured I should post them out to collect some comments, hencing marking this small series as RFC. Please feel free to have a look at each of them; I've put more words in the commit message than here, as the two issues are not related. Any comments are welcomed. Thanks, Peter Xu (2): mm/x86/pat: Only untrack the pfn range if unmap region mm/x86/pat: Do proper PAT bit shift for large mappings mm/huge_memory.c | 4 ++-- mm/memory.c | 5 ++--- 2 files changed, 4 insertions(+), 5 deletions(-) -- 2.45.0