From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qv1-f47.google.com (mail-qv1-f47.google.com [209.85.219.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3FD22168 for ; Tue, 14 Dec 2021 14:59:46 +0000 (UTC) Received: by mail-qv1-f47.google.com with SMTP id m17so17437475qvx.8 for ; Tue, 14 Dec 2021 06:59:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cmpxchg-org.20210112.gappssmtp.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=you/HNG4TZF+v+WKwgjsAzsKRqVZeoHuBuYViT+/dLo=; b=1OmgDUPhOzz+xnmwqNkqxJLq32MqX28qZAHkeLUP5xIh/Iy40cV2PfECn/O4+zQqK8 L0qIocd2YtB9TO5dd3b7R0t2ilUv5ERIJoKTqY1I2ZMoy4Shb8KIJv4Y53/eVlgzDqIS HQFLbAACVrAt0/FgmQWg3/v0jOKeqFI5HVd8wigbcsnsUUSYWm3QZOKVfFzvRxfT1j0A ls03VmuNE9BGkx60wWvK83782eJVTUwnGpIf3rcXQfa/0iYBHm/euRy6L7UUuN8XWX6M qC9iS7ZMX6THwB3oTqlFwd3+AgW1p8fj4nEOTGIHNAQylIkKNhveyp05dU6F7Tw3EBSC tudQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=you/HNG4TZF+v+WKwgjsAzsKRqVZeoHuBuYViT+/dLo=; b=wKLrUY2wgXpK2SzxPPNPYgg47mA6t4+FLe+CzJAScADNbYuyb2Eh79c50UUSbhguNu bUdzfoyUHSE8YYMOg7OMHQ87Sca1Wd+xXrp9a1jAD8qKsSyVjSQmSnnLysCY71JLvLFx PVrNPDgOn3uwbs0rxtcy8eZjhil20Fqf/w4z0a61jTpkUvV9ciXOKYsmT5wgWnlpqW99 OXpclAEa9DkNhI0/DHba0ZflRVOTtnl9bu20qznnuA7+bvaUb8V4Lv8O2hCNUDr46Qps dXZlnaXHHkhXbjGI2wT4M478W84GzoiBTGIIiYKha5QdK6DTgVs1H+GLdts1oTI4qU8E ZURw== X-Gm-Message-State: AOAM530Qfbu2qp8MgwuPj0Z3xFK2eKOLW/UvECRWe1ctLxIxnU6wdEl0 +IROvU0mOVwgGk87VAKm0ha5Kw== X-Google-Smtp-Source: ABdhPJxKprLbaF45m4aFZBCu8TcN47p88Sv27sxNXUwq/W62Jrj+gAb3bfdkghHDiwPsPeORB/7bTw== X-Received: by 2002:ad4:50c7:: with SMTP id e7mr5847985qvq.53.1639493985145; Tue, 14 Dec 2021 06:59:45 -0800 (PST) Received: from localhost ([2620:10d:c091:480::1:e1e4]) by smtp.gmail.com with ESMTPSA id ay36sm49065qkb.60.2021.12.14.06.59.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Dec 2021 06:59:44 -0800 (PST) Date: Tue, 14 Dec 2021 15:59:42 +0100 From: Johannes Weiner To: Vlastimil Babka Cc: Matthew Wilcox , Christoph Lameter , David Rientjes , Joonsoo Kim , Pekka Enberg , linux-mm@kvack.org, Andrew Morton , patches@lists.linux.dev, Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" Subject: Re: [PATCH v2 28/33] bootmem: Use page->index instead of page->freelist Message-ID: References: <20211201181510.18784-1-vbabka@suse.cz> <20211201181510.18784-29-vbabka@suse.cz> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211201181510.18784-29-vbabka@suse.cz> On Wed, Dec 01, 2021 at 07:15:05PM +0100, Vlastimil Babka wrote: > From: "Matthew Wilcox (Oracle)" > > page->freelist is for the use of slab. Using page->index is the same > set of bits as page->freelist, and by using an integer instead of a > pointer, we can avoid casts. > > Signed-off-by: Matthew Wilcox (Oracle) > Signed-off-by: Vlastimil Babka > Cc: Dave Hansen > Cc: Andy Lutomirski > Cc: Peter Zijlstra > Cc: Thomas Gleixner > Cc: Ingo Molnar > Cc: Borislav Petkov > Cc: > Cc: "H. Peter Anvin" Acked-by: Johannes Weiner