From patchwork Tue Jan 26 00:34:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Hansen X-Patchwork-Id: 12044997 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 835ECC433E6 for ; Tue, 26 Jan 2021 00:41:42 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 15123230FE for ; Tue, 26 Jan 2021 00:41:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 15123230FE Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 5C8798D0059; Mon, 25 Jan 2021 19:41:40 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 5A08B8D0065; Mon, 25 Jan 2021 19:41:40 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4DC818D0059; Mon, 25 Jan 2021 19:41:40 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0213.hostedemail.com [216.40.44.213]) by kanga.kvack.org (Postfix) with ESMTP id 25CB28D0065 for ; Mon, 25 Jan 2021 19:41:40 -0500 (EST) Received: from smtpin25.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id E199F1EE6 for ; Tue, 26 Jan 2021 00:41:39 +0000 (UTC) X-FDA: 77746073118.25.home16_08146532758a Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin25.hostedemail.com (Postfix) with ESMTP id BC0751804E3AD for ; Tue, 26 Jan 2021 00:41:39 +0000 (UTC) X-HE-Tag: home16_08146532758a X-Filterd-Recvd-Size: 4365 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by imf50.hostedemail.com (Postfix) with ESMTP for ; Tue, 26 Jan 2021 00:41:38 +0000 (UTC) IronPort-SDR: XtBM3apQWJxpvJ72vWhj/6XEhtFh0FHhafLUZvoWK8Wq0V51MIETEFvFlwlHI9+hWqzoNu0Xvw cQ8f7dcXTJEw== X-IronPort-AV: E=McAfee;i="6000,8403,9875"; a="179973459" X-IronPort-AV: E=Sophos;i="5.79,375,1602572400"; d="scan'208";a="179973459" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jan 2021 16:41:35 -0800 IronPort-SDR: e5hvp7TXBKd+AGfYz2vcRX3Rd7zXOPxjEAc7KkfjO13HyKnTg5K/sYXXUWvvYNzcMZ7D94JV6W drXa9uwmxMwg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.79,375,1602572400"; d="scan'208";a="577639888" Received: from viggo.jf.intel.com (HELO localhost.localdomain) ([10.54.77.144]) by fmsmga005.fm.intel.com with ESMTP; 25 Jan 2021 16:41:35 -0800 Subject: [RFC][PATCH 02/13] mm/vmscan: move RECLAIM* bits to uapi header To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org,Dave Hansen ,ben.widawsky@intel.com,rientjes@google.com,cl@linux.com,alex.shi@linux.alibaba.com,dwagner@suse.de,tobin@kernel.org,akpm@linux-foundation.org,ying.huang@intel.com,dan.j.williams@intel.com,cai@lca.pw,osalvador@suse.de From: Dave Hansen Date: Mon, 25 Jan 2021 16:34:15 -0800 References: <20210126003411.2AC51464@viggo.jf.intel.com> In-Reply-To: <20210126003411.2AC51464@viggo.jf.intel.com> Message-Id: <20210126003415.1171FE94@viggo.jf.intel.com> 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: From: Dave Hansen It is currently not obvious that the RECLAIM_* bits are part of the uapi since they are defined in vmscan.c. Move them to a uapi header to make it obvious. This should have no functional impact. Signed-off-by: Dave Hansen Reviewed-by: Ben Widawsky Acked-by: David Rientjes Acked-by: Christoph Lameter Cc: Alex Shi Cc: Daniel Wagner Cc: "Tobin C. Harding" Cc: Christoph Lameter Cc: Andrew Morton Cc: Huang Ying Cc: Dan Williams Cc: Qian Cai Cc: Daniel Wagner Cc: osalvador Reviewed-by: Oscar Salvador --- Note: This is not cc'd to stable. It does not fix any bugs. --- b/include/uapi/linux/mempolicy.h | 7 +++++++ b/mm/vmscan.c | 8 -------- 2 files changed, 7 insertions(+), 8 deletions(-) diff -puN include/uapi/linux/mempolicy.h~mm-vmscan-move-RECLAIM-bits-to-uapi include/uapi/linux/mempolicy.h --- a/include/uapi/linux/mempolicy.h~mm-vmscan-move-RECLAIM-bits-to-uapi 2021-01-25 16:23:07.197866715 -0800 +++ b/include/uapi/linux/mempolicy.h 2021-01-25 16:23:07.203866715 -0800 @@ -62,5 +62,12 @@ enum { #define MPOL_F_MOF (1 << 3) /* this policy wants migrate on fault */ #define MPOL_F_MORON (1 << 4) /* Migrate On protnone Reference On Node */ +/* + * These bit locations are exposed in the vm.zone_reclaim_mode sysctl + * ABI. New bits are OK, but existing bits can never change. + */ +#define RECLAIM_ZONE (1<<0) /* Run shrink_inactive_list on the zone */ +#define RECLAIM_WRITE (1<<1) /* Writeout pages during reclaim */ +#define RECLAIM_UNMAP (1<<2) /* Unmap pages during reclaim */ #endif /* _UAPI_LINUX_MEMPOLICY_H */ diff -puN mm/vmscan.c~mm-vmscan-move-RECLAIM-bits-to-uapi mm/vmscan.c --- a/mm/vmscan.c~mm-vmscan-move-RECLAIM-bits-to-uapi 2021-01-25 16:23:07.199866715 -0800 +++ b/mm/vmscan.c 2021-01-25 16:23:07.204866715 -0800 @@ -4087,14 +4087,6 @@ module_init(kswapd_init) int node_reclaim_mode __read_mostly; /* - * These bit locations are exposed in the vm.zone_reclaim_mode sysctl - * ABI. New bits are OK, but existing bits can never change. - */ -#define RECLAIM_ZONE (1<<0) /* Run shrink_inactive_list on the zone */ -#define RECLAIM_WRITE (1<<1) /* Writeout pages during reclaim */ -#define RECLAIM_UNMAP (1<<2) /* Unmap pages during reclaim */ - -/* * Priority for NODE_RECLAIM. This determines the fraction of pages * of a node considered for each zone_reclaim. 4 scans 1/16th of * a zone.