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Thu, 29 May 2025 07:57:24 -0700 (PDT) Date: Thu, 29 May 2025 07:57:24 -0700 (PDT) From: "Christoph Lameter (Ampere)" To: Vlastimil Babka cc: David Rientjes , Andrew Morton , Roman Gushchin , Harry Yoo , Matthew Wilcox , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] mm, slab: support NUMA policy for large kmalloc In-Reply-To: <20250529-frozen-pages-for-large-kmalloc-v1-2-b3aa52a8fa17@suse.cz> Message-ID: References: <20250529-frozen-pages-for-large-kmalloc-v1-0-b3aa52a8fa17@suse.cz> <20250529-frozen-pages-for-large-kmalloc-v1-2-b3aa52a8fa17@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 8F44C18000C X-Stat-Signature: u9pxeqpr6g4znsdppxfebi4hes61orec X-Rspam-User: X-HE-Tag: 1748530645-855627 X-HE-Meta: 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 Q/FMfsr4 WXkHYFyv022voyTZp5LZnQUXHsTRwwJ4QZrfAkLurjgnBdx7bQXJ0Kg/sIFh4OGVf62ZIIjrT8DkBGFPB75pTdgkJRrUh0tKwdDeMEVc9pkfa8yVUgeDPMoh6HnSOUNkdKr6WWqKL/Jexprc+eyMkBb0HiXDu0PciT2ZNC8QPddStVWAtCjw9+L9Fx++2qXS+hLFoyMFb62hN0HwlKnS3C8PCo9XpDq9wKeBWCYZKTK1umZrzLtVOJR3M8g== 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 Thu, 29 May 2025, Vlastimil Babka wrote: > The slab allocator observes the task's numa policy in various places > such as allocating slab pages. Large kmalloc allocations currently do > not, which seems to be an unintended omission. It is simple to correct > that, so make ___kmalloc_large_node() behave the same way as > alloc_slab_page(). Large kmalloc allocation lead to the use of the page allocator which implements the NUMA policies for the allocations. This patch is not necessary.