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 X-Spam-Level: X-Spam-Status: No, score=-3.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no 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 BD658C433ED for ; Thu, 29 Apr 2021 07:36:54 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2C65A613A9 for ; Thu, 29 Apr 2021 07:36:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2C65A613A9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=bytedance.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 5765A6B006C; Thu, 29 Apr 2021 03:36:53 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5269E6B006E; Thu, 29 Apr 2021 03:36:53 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 37A846B0070; Thu, 29 Apr 2021 03:36:53 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0245.hostedemail.com [216.40.44.245]) by kanga.kvack.org (Postfix) with ESMTP id 1096F6B006C for ; Thu, 29 Apr 2021 03:36:53 -0400 (EDT) Received: from smtpin23.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id BAFA98248047 for ; Thu, 29 Apr 2021 07:36:52 +0000 (UTC) X-FDA: 78084597864.23.0844388 Received: from mail-pg1-f182.google.com (mail-pg1-f182.google.com [209.85.215.182]) by imf29.hostedemail.com (Postfix) with ESMTP id 6B518DA for ; Thu, 29 Apr 2021 07:36:47 +0000 (UTC) Received: by mail-pg1-f182.google.com with SMTP id z16so5614793pga.1 for ; Thu, 29 Apr 2021 00:36:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=MQXKcQ9KcEZqY03xe0NgMF80WSAnACAs/9znMR5Uqyw=; b=aGXvvaOFqxy4Rj/1ZHgdlRJtm5OBg5ahGhRpOj9aHbZ1/kBEUrjY3PSkjmURS4mp20 LQ+vZgoUxB7VzIFAG2mU0wb82c+b/4IIyOSrV8z3aJX1V1NXTog2CMSzVx04EEtKSK1s D4lmtR+4aa8ToPfQwLe9o1I8gPBgpGmqF3UVpBCLtofWcWlJiGX4KuWIoKwxpE4IFoyo s7UbdGouSGYwFPxM3k7TVuNKKfL83sDEllNh4iwSQtMOHNXVp39yLEKEU6OBSlbnV44S wINVdIPBq5uVR17YISOCAiVkrZF/zH+dpRS89TNawRlUuNcIPiSjTj3g3Ybx3TvaTLZP olsA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=MQXKcQ9KcEZqY03xe0NgMF80WSAnACAs/9znMR5Uqyw=; b=IDSjiIEvcZEhQX/E1echIPzJJWScQCpB/eMdsQgwzIgrJjXlJwHRA0uAgZWKkwNnjh o2nFT8wMZvZxYlZWWodwO2WIWBtsgmFOxiBmnRJJjbBUKR7/tXhj7FIpIGH2J90jaIzl he3FVcYB0cv4d/Llh+58Ve8muqTBDp0mJZ1xWFWMwV+TQ+NmG4smsIxS4WJFo1IuyrnA /K2zlqWgLVnk10NYtO/x/Ge3hkGOtZOwqkkZEjoD+ZTeyxWMBPGZWwzO4Rp3Irb5roGm ejgnw6d+ZgwoLdAyT41fJD+9mhNH4wDXPWBcjzpAuliegHOUXAA6CeW4+XORqUv0FH9Y VPRw== X-Gm-Message-State: AOAM530HvbEvvFD0nlLUrwlgLV/d6Ictl7uoyssqPCRFQchJZeVvC56f pvczG1BOyCRjiz+3j5LfC50w6ujYd+nC15dLwjZRKQ== X-Google-Smtp-Source: ABdhPJxK8Ut6EhdxMn+dWGfAOpoSc8Vw82gx7w5X49AGlOWuPYpJ67QuP20aVAHVVftvDalnzaadpa8ZQ7HXilV/0L0= X-Received: by 2002:a63:1665:: with SMTP id 37mr31262717pgw.31.1619681810202; Thu, 29 Apr 2021 00:36:50 -0700 (PDT) MIME-Version: 1.0 References: <20210428094949.43579-1-songmuchun@bytedance.com> <20210428094949.43579-8-songmuchun@bytedance.com> <20210429064751.GA2216380@infradead.org> In-Reply-To: <20210429064751.GA2216380@infradead.org> From: Muchun Song Date: Thu, 29 Apr 2021 15:36:13 +0800 Message-ID: Subject: Re: [External] Re: [PATCH 7/9] ida: introduce ida_max() to return the maximum allocated ID To: Christoph Hellwig Cc: Matthew Wilcox , Andrew Morton , Johannes Weiner , Michal Hocko , Vladimir Davydov , Shakeel Butt , Roman Gushchin , Yang Shi , alexs@kernel.org, Alexander Duyck , Wei Yang , linux-fsdevel , LKML , Linux Memory Management List Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 6B518DA X-Stat-Signature: z55pzc7ndtcex1n8mwgk1qksq3js89ch X-Rspamd-Server: rspam02 Received-SPF: none (bytedance.com>: No applicable sender policy available) receiver=imf29; identity=mailfrom; envelope-from=""; helo=mail-pg1-f182.google.com; client-ip=209.85.215.182 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1619681807-507250 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: On Thu, Apr 29, 2021 at 2:49 PM Christoph Hellwig wrote: > > On Wed, Apr 28, 2021 at 05:49:47PM +0800, Muchun Song wrote: > > Introduce ida_max() to return the maximum allocated ID. This will be > > used by memory cgroup in the later patch. > > Please also add a lower-level xa_max as this funcationalty would also > come in handy at the xarray level in a few places. Good suggestion. This way is also efficient. Thanks.