From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8497D28850D for ; Sat, 4 Apr 2026 01:43:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=96.67.55.147 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775267016; cv=none; b=suKm7BiEwBfyqukohcrObwzD1SEgFrLQ+/9m6jzkExvzBO/nOcU9NphXhXcbhSXSsTRivun/R3VrkTwkbmwdCOmtUU5fxG2PV6r+ZxTQnH4ORykiw8zjDTemdksppbZdZgJASRoocSVD95tFQ0DsVe1/ButEVCdkmWaY04sUxtk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775267016; c=relaxed/simple; bh=PHW+k8KQfaTNE2WRP5tjhicsFjNo+SBioyXM4XMu8gk=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=NiYEjJIe/pFyG9XkJbKLbRiwLFXs0KWwjzxHKJLwfrNzcZsj1MIqoNNT2eii5zhYWTY7e3keHU1OiO9+wY31LNo7f23l7xqpSWmYkKE7N/Zrv81IpbRByO20DzY1M5lm28Biw+xqFpWyqtwDrP+UxEejYZhOxG82guppcN/VH6c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=surriel.com; spf=pass smtp.mailfrom=surriel.com; dkim=pass (2048-bit key) header.d=surriel.com header.i=@surriel.com header.b=Ol9lcwub; arc=none smtp.client-ip=96.67.55.147 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=surriel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=surriel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=surriel.com header.i=@surriel.com header.b="Ol9lcwub" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=surriel.com ; s=mail; h=MIME-Version:Content-Transfer-Encoding:Content-Type:References: In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=PHW+k8KQfaTNE2WRP5tjhicsFjNo+SBioyXM4XMu8gk=; b=Ol9lcwubolhlRoTGwUL3kna3nS CaFpulKcuPIwmTn18FC17gPDwtLY6JBEgpPbBLzJ9+9GfPHxrk5LZ/Nw99JkxAhzESbGuMsMtPTqP UWlIeokYe3aOrAHWLsgOOtzwBNi9x/1rGV6UPYXX5VtYlHB3r9p3IxWgwpOU4uK5wSiADHH6Xr4nU G/2WmgcvYRTfh0dlJGiBt/hyPeQJL3igMCVgP9pAryYGlKuH09FwLQAkKcUDV/S8uCNyIu5OCMzcB A6JDQu338+ydTWEOmt8gPveb0xnUXJGO5Ies3QIHyEUZ/aj8AvqHj9WUtrxMbt2k/ckCsxzrkNxVS g/a01vLA==; Received: from fangorn.home.surriel.com ([10.0.13.7]) by shelob.surriel.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.97.1) (envelope-from ) id 1w8q2l-000000000cl-3M6u; Fri, 03 Apr 2026 21:43:23 -0400 Message-ID: <901716dddb748bd91a107cce1f95a8eb44ebeeae.camel@surriel.com> Subject: Re: [RFC 1/2] mm: page_alloc: replace pageblock_flags bitmap with struct pageblock_data From: Rik van Riel To: Johannes Weiner , linux-mm@kvack.org Cc: Vlastimil Babka , Zi Yan , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , linux-kernel@vger.kernel.org, Johannes Weiner Date: Fri, 03 Apr 2026 21:43:21 -0400 In-Reply-To: <20260403194526.477775-2-hannes@cmpxchg.org> References: <20260403194526.477775-1-hannes@cmpxchg.org> <20260403194526.477775-2-hannes@cmpxchg.org> Autocrypt: addr=riel@surriel.com; prefer-encrypt=mutual; keydata=mQENBFIt3aUBCADCK0LicyCYyMa0E1lodCDUBf6G+6C5UXKG1jEYwQu49cc/gUBTTk33A eo2hjn4JinVaPF3zfZprnKMEGGv4dHvEOCPWiNhlz5RtqH3SKJllq2dpeMS9RqbMvDA36rlJIIo47 Z/nl6IA8MDhSqyqdnTY8z7LnQHqq16jAqwo7Ll9qALXz4yG1ZdSCmo80VPetBZZPw7WMjo+1hByv/ lvdFnLfiQ52tayuuC1r9x2qZ/SYWd2M4p/f5CLmvG9UcnkbYFsKWz8bwOBWKg1PQcaYHLx06sHGdY dIDaeVvkIfMFwAprSo5EFU+aes2VB2ZjugOTbkkW2aPSWTRsBhPHhV6dABEBAAG0HlJpayB2YW4gU mllbCA8cmllbEByZWRoYXQuY29tPokBHwQwAQIACQUCW5LcVgIdIAAKCRDOed6ShMTeg05SB/986o gEgdq4byrtaBQKFg5LWfd8e+h+QzLOg/T8mSS3dJzFXe5JBOfvYg7Bj47xXi9I5sM+I9Lu9+1XVb/ r2rGJrU1DwA09TnmyFtK76bgMF0sBEh1ECILYNQTEIemzNFwOWLZZlEhZFRJsZyX+mtEp/WQIygHV WjwuP69VJw+fPQvLOGn4j8W9QXuvhha7u1QJ7mYx4dLGHrZlHdwDsqpvWsW+3rsIqs1BBe5/Itz9o 6y9gLNtQzwmSDioV8KhF85VmYInslhv5tUtMEppfdTLyX4SUKh8ftNIVmH9mXyRCZclSoa6IMd635 Jq1Pj2/Lp64tOzSvN5Y9zaiCc5FucXtB9SaWsgdmFuIFJpZWwgPHJpZWxAc3VycmllbC5jb20+iQE +BBMBAgAoBQJSLd2lAhsjBQkSzAMABgsJCAcDAgYVCAIJCgsEFgIDAQIeAQIXgAAKCRDOed6ShMTe g4PpB/0ZivKYFt0LaB22ssWUrBoeNWCP1NY/lkq2QbPhR3agLB7ZXI97PF2z/5QD9Fuy/FD/jddPx KRTvFCtHcEzTOcFjBmf52uqgt3U40H9GM++0IM0yHusd9EzlaWsbp09vsAV2DwdqS69x9RPbvE/Ne fO5subhocH76okcF/aQiQ+oj2j6LJZGBJBVigOHg+4zyzdDgKM+jp0bvDI51KQ4XfxV593OhvkS3z 3FPx0CE7l62WhWrieHyBblqvkTYgJ6dq4bsYpqxxGJOkQ47WpEUx6onH+rImWmPJbSYGhwBzTo0Mm G1Nb1qGPG+mTrSmJjDRxrwf1zjmYqQreWVSFEt26tBpSaWsgdmFuIFJpZWwgPHJpZWxAZmIuY29tP okBPgQTAQIAKAUCW5LbiAIbIwUJEswDAAYLCQgHAwIGFQgCCQoLBBYCAwECHgECF4AACgkQznneko TE3oOUEQgAsrGxjTC1bGtZyuvyQPcXclap11Ogib6rQywGYu6/Mnkbd6hbyY3wpdyQii/cas2S44N cQj8HkGv91JLVE24/Wt0gITPCH3rLVJJDGQxprHTVDs1t1RAbsbp0XTksZPCNWDGYIBo2aHDwErhI omYQ0Xluo1WBtH/UmHgirHvclsou1Ks9jyTxiPyUKRfae7GNOFiX99+ZlB27P3t8CjtSO831Ij0Ip QrfooZ21YVlUKw0Wy6Ll8EyefyrEYSh8KTm8dQj4O7xxvdg865TLeLpho5PwDRF+/mR3qi8CdGbkE c4pYZQO8UDXUN4S+pe0aTeTqlYw8rRHWF9TnvtpcNzZw== Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2 (3.56.2-2.fc42) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Fri, 2026-04-03 at 15:40 -0400, Johannes Weiner wrote: > From: Johannes Weiner >=20 > Replace the packed pageblock_flags bitmap with a per-pageblock struct > containing its own flags word. This changes the storage from > NR_PAGEBLOCK_BITS bits per pageblock packed into shared unsigned > longs, > to a dedicated unsigned long per pageblock. >=20 > Signed-off-by: Johannes Weiner Reviewed-by: Rik van Riel --=20 All Rights Reversed.