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(p200300d82f4e3200c99da38b3f3ad4b3.dip0.t-ipconnect.de. [2003:d8:2f4e:3200:c99d:a38b:3f3a:d4b3]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-475caea0468sm54964965e9.8.2025.10.23.13.02.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 23 Oct 2025 13:02:30 -0700 (PDT) Message-ID: <8d5243ec-3edd-49a6-ab51-16643a709d84@redhat.com> Date: Thu, 23 Oct 2025 22:02:28 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 09/13] powerpc/mm: replace batch->active with in_lazy_mmu_mode() To: Kevin Brodsky , linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, Alexander Gordeev , Andreas Larsson , Andrew Morton , Boris Ostrovsky , Borislav Petkov , Catalin Marinas , Christophe Leroy , Dave Hansen , "David S. Miller" , "H. Peter Anvin" , Ingo Molnar , Jann Horn , Juergen Gross , "Liam R. Howlett" , Lorenzo Stoakes , Madhavan Srinivasan , Michael Ellerman , Michal Hocko , Mike Rapoport , Nicholas Piggin , Peter Zijlstra , Ryan Roberts , Suren Baghdasaryan , Thomas Gleixner , Vlastimil Babka , Will Deacon , Yeoreum Yun , linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, xen-devel@lists.xenproject.org, x86@kernel.org References: <20251015082727.2395128-1-kevin.brodsky@arm.com> <20251015082727.2395128-10-kevin.brodsky@arm.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZoEEwEIAEQCGwMCF4ACGQEFCwkIBwICIgIG FQoJCAsCBBYCAwECHgcWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaJzangUJJlgIpAAKCRBN 3hD3AP+DWhAxD/9wcL0A+2rtaAmutaKTfxhTP0b4AAp1r/eLxjrbfbCCmh4pqzBhmSX/4z11 opn2KqcOsueRF1t2ENLOWzQu3Roiny2HOU7DajqB4dm1BVMaXQya5ae2ghzlJN9SIoopTWlR 0Af3hPj5E2PYvQhlcqeoehKlBo9rROJv/rjmr2x0yOM8qeTroH/ZzNlCtJ56AsE6Tvl+r7cW 3x7/Jq5WvWeudKrhFh7/yQ7eRvHCjd9bBrZTlgAfiHmX9AnCCPRPpNGNedV9Yty2Jnxhfmbv Pw37LA/jef8zlCDyUh2KCU1xVEOWqg15o1RtTyGV1nXV2O/mfuQJud5vIgzBvHhypc3p6VZJ lEf8YmT+Ol5P7SfCs5/uGdWUYQEMqOlg6w9R4Pe8d+mk8KGvfE9/zTwGg0nRgKqlQXrWRERv cuEwQbridlPAoQHrFWtwpgYMXx2TaZ3sihcIPo9uU5eBs0rf4mOERY75SK+Ekayv2ucTfjxr Kf014py2aoRJHuvy85ee/zIyLmve5hngZTTe3Wg3TInT9UTFzTPhItam6dZ1xqdTGHZYGU0O otRHcwLGt470grdiob6PfVTXoHlBvkWRadMhSuG4RORCDpq89vu5QralFNIf3EysNohoFy2A LYg2/D53xbU/aa4DDzBb5b1Rkg/udO1gZocVQWrDh6I2K3+cCs7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20251015082727.2395128-10-kevin.brodsky@arm.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: dq_unbzhLl8S96zyRSVUimuXXU6RjrWefjucAZgPhyc_1761249751 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 60B87180006 X-Stat-Signature: e6mxd8nmbgkjpadttdgx7gbcpw3ntwp5 X-Rspam-User: X-HE-Tag: 1761249754-993144 X-HE-Meta: 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 F/9bDpHv qfUHeOGj9F3+cx8cqxLtJ6ye4IJTKJRQa6tLPox1+somnbaSNLBTLp/p7QKVooYkt15vKwCHYxJxFlKGQrpLbvVhfbCNVy/0MxX4x2wOIc2Ryckz524SZVrWJGwOMn++02X4n4Z5cNerbhqgABZrM67R+cKAi/fT7VXlsIYcVNRSGwEXqhZr0fL3FUHAOtSpfPR0danFjVphnbVMJ2YshBeU8pWKZt6ikdZYHW+OVwBio2CQjk8F0/XSNfmYdaiuwModohGWoHtpxnkrAmZZjzivmlHxzXhSqjDNcxRYwyeTIyGAOErKMuGvSmim1iSAHirR/dyGut8rCZqhjDjqENULv845GSBTFjLGZR07IKYsMGqNXdfExQHK9UbWNleBklS+1bAQPjUOcUn3ettVWQwK6nQEnhTJy34t5HFncMaVmVbwNm37Pa/AVzBDvdKz2WJzF64hMM5mNG3v+jWEpB7/Y5pjZ7W12GDqD 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 15.10.25 10:27, Kevin Brodsky wrote: > The generic lazy_mmu layer now tracks whether a task is in lazy MMU > mode. As a result we no longer need to track whether the per-CPU TLB > batch struct is active - we know it is if in_lazy_mmu_mode() returns > true. It's worth adding that disabling preemption while enabled makes sure that we cannot reschedule while in lazy MMU mode, so when the per-CPU TLB batch structure is active. -- Cheers David / dhildenb