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=-3.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 3D360C433B4 for ; Thu, 29 Apr 2021 06:50:10 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 22BE361453 for ; Thu, 29 Apr 2021 06:50:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 22BE361453 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 5D2F36B006C; Thu, 29 Apr 2021 02:50:08 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 55B0F6B006E; Thu, 29 Apr 2021 02:50:08 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3D4E16B0070; Thu, 29 Apr 2021 02:50:08 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0032.hostedemail.com [216.40.44.32]) by kanga.kvack.org (Postfix) with ESMTP id 1E27B6B006C for ; Thu, 29 Apr 2021 02:50:08 -0400 (EDT) Received: from smtpin04.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id C700E1821E981 for ; Thu, 29 Apr 2021 06:50:07 +0000 (UTC) X-FDA: 78084480054.04.49DBF3B Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf16.hostedemail.com (Postfix) with ESMTP id 98AAB80192D4 for ; Thu, 29 Apr 2021 06:50:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=MUKh3q8a4SHYsvnkYAfxbKChRjzMGvWP8fV8eM1XBoo=; b=lzN0Eb1bVt0buxA5hryBAMp41/ kqRV2TMwDqX055zwFHsdTx5ZEYzk6OGKMxMYfoWZPGyKzZ8WHCb01+PCKPQ0tfWuCk8ByVTof0/oZ JWd02LFOJqD4HrfZIoPGorY25qNMw1co5KiaG/jhbSwihC4p4Zi2kAPNmTUb4oqssUnF2CWkkEVgi 2tL+42POhWbblvqG4Ldl0fy/4VryFiYM4DaznVlbi4J2nZeSUn+uPkMdFc6Ex8leocm4jt9alMRwa RYvVlY3SFqU4qHhcaFFoSte8wuiBfGNs3VUvshTMs9vSYnMcDQ7pFbwg3EB3eQ5yZbuESQl5Jbp+Y nQDQ7IfA==; Received: from hch by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lc0Sl-009IgJ-Fp; Thu, 29 Apr 2021 06:48:13 +0000 Date: Thu, 29 Apr 2021 07:47:51 +0100 From: Christoph Hellwig To: Muchun Song Cc: willy@infradead.org, akpm@linux-foundation.org, hannes@cmpxchg.org, mhocko@kernel.org, vdavydov.dev@gmail.com, shakeelb@google.com, guro@fb.com, shy828301@gmail.com, alexs@kernel.org, alexander.h.duyck@linux.intel.com, richard.weiyang@gmail.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 7/9] ida: introduce ida_max() to return the maximum allocated ID Message-ID: <20210429064751.GA2216380@infradead.org> References: <20210428094949.43579-1-songmuchun@bytedance.com> <20210428094949.43579-8-songmuchun@bytedance.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210428094949.43579-8-songmuchun@bytedance.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 98AAB80192D4 X-Stat-Signature: 1srwhbybhoz7cri68oper1bnwssowzrq Received-SPF: none (casper.srs.infradead.org>: No applicable sender policy available) receiver=imf16; identity=mailfrom; envelope-from=""; helo=casper.infradead.org; client-ip=90.155.50.34 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1619679002-33861 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 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.