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a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1755499584; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:references:dkim-signature; bh=3d2pSjfDoc8gBOUS0aTXd2FKYM2vD6M0xOsbu0ZmJgY=; b=vtL5wXw/R88Rx41h3x0Ung38qUE48xyL2iznju/lrhBvtLBEo1fZwVjBSzQ1GmxH5EFHkv Q12pYILh5dC5lOhWdsxyvXpnz416cbd/E/dPX7JgkYwcr9cOrP+n0Kj/AOMVa4OVR7b7W7 wFgl/xP4vCfJAIcprG4NWhV69IWzYd4= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 0346F41906; Mon, 18 Aug 2025 06:46:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C2A80C4CEEB; Mon, 18 Aug 2025 06:46:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755499582; bh=k4wONO4GgkZMYhiVNRn+Rqnc6LMhXUM48Phy2bxQxHI=; h=From:To:Cc:Subject:Date:From; b=B4Ak7vcNjHcl3W8hAbH6xBZ+wbLYCOfqkG60Sdu897lVLfK1LXXnhUht3bRC4Jq8P VEChPSyBLxM4RgEv0aekhlDJYA9jDa/WWebABA4qnklv7rnhxQZPv6bYXoCNLCQDdY UBa0ZeOXdAhEfKiUkIgfC/SPPiEujZxxLi2wbNScw1IH4IC5/qe6Ccxkrnmcwc7hhw I30DdRoCb+xuoQTTCRDtt5H3Fp80+vUsRniIX1GqzD5rphLKbUYBiu5nbz8Wu6HVfN 2FjqOQg7nL/R60MEq/tmHX/SZqcdwRHB87q7lJfEEMIRJTnmAU/Hs4NJxJ0ygInlrI 546Z0BC7FB3ZA== From: Mike Rapoport To: linux-mm@kvack.org Cc: Andrew Morton , Bill Wendling , Daniel Jordan , Justin Stitt , Michael Ellerman , Miguel Ojeda , Mike Rapoport , Nathan Chancellor , Nick Desaulniers , linux-kernel@vger.kernel.org, llvm@lists.linux.dev Subject: [PATCH 0/4] mm/mm_init: simplify deferred init of struct pages Date: Mon, 18 Aug 2025 09:46:11 +0300 Message-ID: <20250818064615.505641-1-rppt@kernel.org> X-Mailer: git-send-email 2.50.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam03 X-Rspam-User: X-Rspamd-Queue-Id: 6BAE7C000B X-Stat-Signature: ekizem9zkjp35icyet7ogiup1ayusb6c X-HE-Tag: 1755499584-295926 X-HE-Meta: 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 WCCFtCCj 03GSFOgPhG3rOVuHH9VBT9+OeO1me4G5AxZxB8hL1k/5lRJkBSWFizLnJbPelHqjtlN3F7E5LdX5HgUoN/yiWGG8yk2hou7w31DyrCN854iGx6EAcCE42sFaDj8MIUyzKbX1Sq0kukbxwgQ1/m2f5lkD50hU+lKYTx6pWqSP0DLcF0CLn1fYot2tODmF7mgfrPWV923wfaOX5P7Kw4dQoIvBqqWbK1YH22PJzKHpInkfWEZunEZPo3Bon+nouOie4mt/zXssx9Qmih7PDP87ZNOUm+ifKN43SWKQxQgv9VasbS/lFFJSC85wauyNZPMME4oEGalpHV1850RlqcQEWEdzV8ynX4uXAvFwPap2FxbG2+Xc= 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: From: "Mike Rapoport (Microsoft)" Hi, These patches simplify deferred initialization of the memory map. Beside nice negative diffstat I measured 3ms reduction in the initialization of deferred pages on single node system with 64GiB of RAM. I don't have access to large memory machines, so I'd really appreciate testing of these patches on them to make sure there's no regression there. The patches are also available at git: https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git/log/?h=deferred-memmap-init/v1 Mike Rapoport (Microsoft) (4): mm/mm_init: use deferred_init_memmap_chunk() in deferred_grow_zone() mm/mm_init: deferred_init_memmap: use a job per zone mm/mm_init: drop deferred_init_maxorder() memblock: drop for_each_free_mem_pfn_range_in_zone_from() .clang-format | 1 - include/linux/memblock.h | 22 ----- mm/memblock.c | 64 ------------- mm/mm_init.c | 195 +++++++++++++-------------------------- 4 files changed, 62 insertions(+), 220 deletions(-) base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 -- 2.50.1