From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3182FCD4F24 for ; Wed, 13 May 2026 14:44:28 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 54B4C6B00DA; Wed, 13 May 2026 10:44:27 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4FB8B6B00DC; Wed, 13 May 2026 10:44:27 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3EB726B00DD; Wed, 13 May 2026 10:44:27 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 290036B00DA for ; Wed, 13 May 2026 10:44:27 -0400 (EDT) Received: from smtpin18.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay03.hostedemail.com (Postfix) with ESMTP id EB14FA017A for ; Wed, 13 May 2026 14:44:26 +0000 (UTC) X-FDA: 84762667332.18.AF74FFA Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf07.hostedemail.com (Postfix) with ESMTP id 3920C4000E for ; Wed, 13 May 2026 14:44:25 +0000 (UTC) Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=h0NFZoao; spf=pass (imf07.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1778683465; 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-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=dJ7bRiHKS1Kb1X9Hv1sdAAonfiSS3ixuaEzwGiHqIoY=; b=4SLsTXdkRLBo6sQkVYXGZiec9cX0QMHuzeg5OKpkfnzDywocteF4RnVI6JGADkodKrcmVx n1HVAJO520nyZcMfyqyPV9NlWAIyYRJj8qWyOPoIGbeMbqJdQU4+F+ObGrJbL/cCXaQMhD fNzIXU7dJuQwHpnxI6G2iMHwby4uEc0= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1778683465; a=rsa-sha256; cv=none; b=N17MtDwusC7njr8deF+yyf4jiGzlBPM5YSjI1Yxmv4glyHu7yYeDblg1CU+HeHfi7MlohL XRW91pvXCmOEB0OPhh61SmV50K1gym89Gc+sxZ4Z4mP5bn5vV4zGL3dlmwZX180y9++Ir8 HpOW5h26u9RZ+qmoR7lXdWCbLUGdSeY= ARC-Authentication-Results: i=1; imf07.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=h0NFZoao; spf=pass (imf07.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 0EA6940D93; Wed, 13 May 2026 14:44:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 00750C19425; Wed, 13 May 2026 14:44:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778683463; bh=ig7qEY61qWpO2qqxgUl9QTZ5VrdTBw85h6pXPckbh/w=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=h0NFZoaoDh7fQdlc79oCfhVnXSN8TcLjFKXCH0qOYZtKtmxbwhWEdcXJjBhmTE2Zh KSdaZwyh3Rsnk/b14AMd/XavhYhWeV02x38FFxIM2xQOZLXj8/VcMm6Yterb8B7o5y uhWgyP2i3xEXrwfLLmiPxUrKajn34WJqy529q3Lbzg44AxEwCNByiZlTPl4RJJ9Exw nzQiEqRv/LJ4NAwdsQvmOxOmBb5kub03GMIi8lGXp8jFMcFY9qVNAP633a11TBWy8n 1Vs1lQYKWio8VdJgVEOJhTrkoUryhTEsegcqfRXzg2QHvyji7eN3JiFwMZX/CgVxhA Wr48RWKY/YRNA== Date: Wed, 13 May 2026 17:44:13 +0300 From: Mike Rapoport To: Brendan Jackman Cc: Andrew Morton , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , "Rafael J. Wysocki" , Pavel Machek , Len Brown , Johannes Weiner , Zi Yan , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Subject: Re: [PATCH 1/4] mm: introduce for_each_free_list() Message-ID: References: <20260513-page_alloc-unmapped-prep-v1-0-dacdf5402be8@google.com> <20260513-page_alloc-unmapped-prep-v1-1-dacdf5402be8@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260513-page_alloc-unmapped-prep-v1-1-dacdf5402be8@google.com> X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 3920C4000E X-Rspam-User: X-Stat-Signature: ryh8s7n7k8pe43m3wafzcbuxctujg57k X-HE-Tag: 1778683465-874466 X-HE-Meta: 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 tL3QCy9T 2/1BastlA/Gsn+O1OcLN21IZZEFy+BJx+R5Wb0E9MNUzAJ9pClOnbb71g57vDQ1hEwDTlQOBb0IgPsrEJZJ6d6/1dRc6Tf5w0Uzhkof1AbKy0rk3eVjR1tgdmiiM/vwkXVvKfKRpy/DcLbUCiZ9fgNrGKqsTbuOtwafVSIR2xGQSsO9ZTrSzBk/aOOMDZtmpzdrdHRhRtoExt2TxEOeaYBhAVDd2lLfc4nUULFBG6R1JlHr1bucrDGrmVg0aXTlMKMamkMrAmxFseJDqHfl4j3hcBzO4wQJKkYx5Gi3ljKpZoRrZ8y/MBsHa+8+fByV1K6l4TNfYXBbpEn9yzzqCZTjbk27zgV/W4s6Hx Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, May 13, 2026 at 12:35:13PM +0000, Brendan Jackman wrote: > There are a couple of places that iterate over the freelists with > awareness of the data structures' layout. > > It seems ideally, code outside of mm should not be aware of the page > allocator's freelists at all. But, this patch just doesn't hide them > completely, it's just a meek incremental step in that direction: provide > a macro to iterate over it without needing to be aware of the actual > struct fields. > > Signed-off-by: Brendan Jackman > --- > include/linux/mmzone.h | 9 ++++++--- > kernel/power/snapshot.c | 8 ++++---- looks scary what it does with zones and pages :/ > mm/mm_init.c | 11 +++++++---- Acked-by: Mike Rapoport (Microsoft) > 3 files changed, 17 insertions(+), 11 deletions(-) -- Sincerely yours, Mike.