Message ID | 20210814211713.180533-15-yury.norov@gmail.com (mailing list archive) |
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State | New |
Headers | show
Return-Path: <SRS0=kFMd=NF=kvack.org=owner-linux-mm@kernel.org> 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=-13.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT 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 C294DC432BE for <linux-mm@archiver.kernel.org>; Sat, 14 Aug 2021 21:19:07 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 770DA60EE2 for <linux-mm@archiver.kernel.org>; Sat, 14 Aug 2021 21:19:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 770DA60EE2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 1A2E98D0010; Sat, 14 Aug 2021 17:19:07 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 152F98D0009; Sat, 14 Aug 2021 17:19:07 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F0FAA8D0010; Sat, 14 Aug 2021 17:19:06 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0182.hostedemail.com [216.40.44.182]) by kanga.kvack.org (Postfix) with ESMTP id D59F78D0009 for <linux-mm@kvack.org>; Sat, 14 Aug 2021 17:19:06 -0400 (EDT) Received: from smtpin35.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 844F78249980 for <linux-mm@kvack.org>; Sat, 14 Aug 2021 21:19:06 +0000 (UTC) X-FDA: 78474951492.35.755F1EF Received: from mail-pl1-f181.google.com (mail-pl1-f181.google.com [209.85.214.181]) by imf05.hostedemail.com (Postfix) with ESMTP id 3ED7E5050BE6 for <linux-mm@kvack.org>; Sat, 14 Aug 2021 21:19:06 +0000 (UTC) Received: by mail-pl1-f181.google.com with SMTP id d1so16333239pll.1 for <linux-mm@kvack.org>; Sat, 14 Aug 2021 14:19:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=Cln644oA5BtyIgpgaZQiZNhvZEjmPyvVC+lofWod4OE=; b=WMJpwYfq3UWrnHQf3XZGnUwN7halllE4Zh6nVwPNP+xHqyTu1DBiwM63+thW+pB61w H0lrWah0eBUT5yAxpyUwU0zZt/dibfzOvgTPZaPZH53pRJ2GGERqb95nsamfAPaeHuY8 sqzjFzro/0HBMvkXu9jCm/lV4KF7sNZeh6a8baeBCXFHzS7iHNCyJW5i/qX3uzmFo54B g7tPy2mU45RHZkA0i9xNhHwqc8dvVplUiR58RGDbEQKqJF+gzV8X17g7K3uBUUdxPdYx Vw78pu3ui78jXj1e0LRtun92xYYb/T9VWLdB9qFhAf4MkYEHUC8S9wnbW0gnkulz4xF6 BjkQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Cln644oA5BtyIgpgaZQiZNhvZEjmPyvVC+lofWod4OE=; b=KnThRa9euuJ5GNoHj41z97nRzQS2JWCv16yISU5txvq6IQy98KbWDS1LZNtvNPNKJa fhqKpVMpPbu3JU+aXdm6GLs8SX6e2Om+u8vKacpDK3mrndAjS/GzDX003lkRXEdKjRUi JpEmOCDREayzkrB+4MIM2OPYIZpNyvFzIqu+FBGieo47iXxJ81v8w8kQIWe6IrbQkKhP qVfynH0JJ0dadlAu4/JbRIiR+jh7g8I/DUB9On6tOZllTgvGBFkSWdVPVKQll6QrQ62Z aT7YIhzkFVwxBZM26ncayiiH2vCjOIpNvYPd0X65o81zYRsWMKaing6v9MD44gTmtcpq i1aA== X-Gm-Message-State: AOAM530S7OUq+3NsmUdn2StJ9g2NFXU8uRrhiaAJWgkPrnq8ZMTZM6eb EX8xj5NIDS6xC0ubaza6E2A= X-Google-Smtp-Source: ABdhPJzpRyMzX46v+gpIRpFuXuj44bZVB/U1vao07RTfvftK/oxJua8CT59/WjdrrOo4bVCIWqTwCA== X-Received: by 2002:aa7:9050:0:b029:3af:7e99:f48f with SMTP id n16-20020aa790500000b02903af7e99f48fmr8626836pfo.2.1628975945341; Sat, 14 Aug 2021 14:19:05 -0700 (PDT) Received: from localhost ([12.28.44.171]) by smtp.gmail.com with ESMTPSA id 26sm7830159pgx.72.2021.08.14.14.19.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 Aug 2021 14:19:05 -0700 (PDT) From: Yury Norov <yury.norov@gmail.com> To: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mmc@vger.kernel.org, linux-perf-users@vger.kernel.org, kvm@vger.kernel.org, "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>, Alexander Lobakin <alobakin@pm.me>, Alexander Shishkin <alexander.shishkin@linux.intel.com>, Alexey Klimov <aklimov@redhat.com>, Andrea Merello <andrea.merello@gmail.com>, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, Arnaldo Carvalho de Melo <acme@redhat.com>, Arnd Bergmann <arnd@arndb.de>, Ben Gardon <bgardon@google.com>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Brian Cain <bcain@codeaurora.org>, Catalin Marinas <catalin.marinas@arm.com>, Christoph Lameter <cl@linux.com>, Daniel Bristot de Oliveira <bristot@redhat.com>, David Hildenbrand <david@redhat.com>, Dennis Zhou <dennis@kernel.org>, Geert Uytterhoeven <geert@linux-m68k.org>, Heiko Carstens <hca@linux.ibm.com>, Ian Rogers <irogers@google.com>, Ingo Molnar <mingo@redhat.com>, Jaegeuk Kim <jaegeuk@kernel.org>, Jakub Kicinski <kuba@kernel.org>, Jiri Olsa <jolsa@redhat.com>, Joe Perches <joe@perches.com>, Jonas Bonn <jonas@southpole.se>, Leo Yan <leo.yan@linaro.org>, Mark Rutland <mark.rutland@arm.com>, Namhyung Kim <namhyung@kernel.org>, Palmer Dabbelt <palmer@dabbelt.com>, Paolo Bonzini <pbonzini@redhat.com>, Peter Xu <peterx@redhat.com>, Peter Zijlstra <peterz@infradead.org>, Petr Mladek <pmladek@suse.com>, Rasmus Villemoes <linux@rasmusvillemoes.dk>, Rich Felker <dalias@libc.org>, Samuel Mendoza-Jonas <sam@mendozajonas.com>, Sean Christopherson <seanjc@google.com>, Sergey Senozhatsky <senozhatsky@chromium.org>, Shuah Khan <shuah@kernel.org>, Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>, Steven Rostedt <rostedt@goodmis.org>, Tejun Heo <tj@kernel.org>, Thomas Bogendoerfer <tsbogend@alpha.franken.de>, Ulf Hansson <ulf.hansson@linaro.org>, Will Deacon <will@kernel.org>, Wolfram Sang <wsa+renesas@sang-engineering.com>, Yoshinori Sato <ysato@users.sourceforge.jp>, Yury Norov <yury.norov@gmail.com> Subject: [PATCH 14/17] mm/percpu: micro-optimize pcpu_is_populated() Date: Sat, 14 Aug 2021 14:17:10 -0700 Message-Id: <20210814211713.180533-15-yury.norov@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210814211713.180533-1-yury.norov@gmail.com> References: <20210814211713.180533-1-yury.norov@gmail.com> MIME-Version: 1.0 Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=gmail.com header.s=20161025 header.b=WMJpwYfq; spf=pass (imf05.hostedemail.com: domain of yurynorov@gmail.com designates 209.85.214.181 as permitted sender) smtp.mailfrom=yurynorov@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 3ED7E5050BE6 X-Stat-Signature: m1ha6nhpsjr4mdqi7y1fzj5px4p6xw14 X-HE-Tag: 1628975946-855568 Content-Transfer-Encoding: quoted-printable 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: <linux-mm.kvack.org> |
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Resend bitmap patches
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diff --git a/mm/percpu.c b/mm/percpu.c index a43039629aa4..8bf8b88446d7 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -1070,17 +1070,18 @@ static void pcpu_block_update_hint_free(struct pcpu_chunk *chunk, int bit_off, static bool pcpu_is_populated(struct pcpu_chunk *chunk, int bit_off, int bits, int *next_off) { - unsigned int page_start, page_end, rs, re; + unsigned int start, end; - page_start = PFN_DOWN(bit_off * PCPU_MIN_ALLOC_SIZE); - page_end = PFN_UP((bit_off + bits) * PCPU_MIN_ALLOC_SIZE); + start = PFN_DOWN(bit_off * PCPU_MIN_ALLOC_SIZE); + end = PFN_UP((bit_off + bits) * PCPU_MIN_ALLOC_SIZE); - rs = page_start; - bitmap_next_clear_region(chunk->populated, &rs, &re, page_end); - if (rs >= page_end) + start = find_next_zero_bit(chunk->populated, end, start); + if (start >= end) return true; - *next_off = re * PAGE_SIZE / PCPU_MIN_ALLOC_SIZE; + end = find_next_bit(chunk->populated, end, start + 1); + + *next_off = end * PAGE_SIZE / PCPU_MIN_ALLOC_SIZE; return false; }