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b=ueKp/Tc3D2T4mj9KONopLzkmpEcHbY3/kRGZG8SfqhL0L/aWP1ghxhxSVO03Ua5mE yLXwsiAenxD64ayJqoXfs8iBRWzAhqWZx+giUMaZ1iF2Bnx4m6ALNtlTwi0A7newGd I11xXRhvr1Geih5+J41lYDYfvA0fjuE85t2jSJk+D6EnfQjbLvYgHW+RmvM/XyhtCQ Ohh6PQSqRU31ugGUgxooghMNNshX6qSmQgpWHwIUAmCOeY4p4GXXuK1cXFHrr8XVCg usqs8p7pLJ9h0/rJVkm72u93GV5OUM7b5FdOEjl/B+MV+OFBfEttg7HY+3kR12WxY7 9HLpsZUfy2QdA== From: "Barry Song (Xiaomi)" To: david@kernel.org, urezki@gmail.com Cc: baohua@kernel.org, 21cnbao@gmail.com, akpm@linux-foundation.org, dri-devel@lists.freedesktop.org, jstultz@google.com, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-mm@kvack.org, mripard@kernel.org, sumit.semwal@linaro.org, xueyuan.chen21@gmail.com Subject: Re: [PATCH] mm/vmalloc: map contiguous pages in batches for vmap() whenever possible Date: Tue, 14 Apr 2026 04:34:10 +0800 Message-Id: <20260413203410.13079-1-baohua@kernel.org> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20260403092028.61257-1-baohua@kernel.org> References: <20260403092028.61257-1-baohua@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: F05BF140004 X-Stat-Signature: sus3sb5yphwirb9oqxgo5xrynkr951od X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1776112455-986688 X-HE-Meta: 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 7RCyM/lz 7eVfrranS90H7k4MQklFRjS5OcQgn+aVjtydrU6V7zH05hT9BNp9WrrZitaZ3tCcVYdThd891doiwOTUdZCUtlDX8LwQYyrbO8H7uC/L3zuTF8Yz+IxQAG0SpiIRLGPW5rHFpMBAGoTwWW5vN9EyeDivqBWAcYgBKMkvjrNT5bIvfsDs3Un2Z5X3ePKKeV14Isj1R9zcL4mceptkqs+5afJdKIaqFyPDQHFQDLG0vw45iEDQKFuHbiHZacULvk6Z+6YYio1WHvFueFpqfHrnAqiUUQwimBSrrlJOp5u+j+HOhFNGsgVg28NZb8ULmZxFTfThm81pCDMlTVLRdIviU8ctorob4S7xoNG4veV3ZYne3Z3E= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: >> vmap_page_range() does flushing and it has instrumented KMSAN inside. >> We should follow same semantic. Also it uses ioremap_max_page_shift as >> maximum page shift policy. > > Not quite sure if vmap() should follow ioremap()’s > ioremap_max_page_shift. If needed, it shouldn’t be > difficult to do so. > > I have a version queued for testing (Xueyuan is working > hard on it). Meanwhile, if you have any comments, please > feel free to share. > > diff --git a/mm/vmalloc.c b/mm/vmalloc.c > index 57eae99d9909..8d449e78a07a 100644 Hi Uladzislau, David, As explained there [1], this standalone patch is withdrawn, as I have moved to a series that addresses a broader set of issues. Sorry for any confusion this may have caused. [1] https://lore.kernel.org/all/CAGsJ_4wCBeVfyFraj_dRdsUrSNqDG5a8SO9C3=PFRSt04dRvGw@mail.gmail.com/ Best Regards Barry