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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22717C433FE for ; Tue, 18 Oct 2022 23:14:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229717AbiJRXOc (ORCPT ); Tue, 18 Oct 2022 19:14:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48092 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229710AbiJRXOb (ORCPT ); Tue, 18 Oct 2022 19:14:31 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E9EB21004C for ; Tue, 18 Oct 2022 16:14:29 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 9DA3FB8218E for ; Tue, 18 Oct 2022 23:14:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 526CEC433C1; Tue, 18 Oct 2022 23:14:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1666134867; bh=it/XwiKa/HgY7E43MxGfG1iOA62gzVwOHzG9ZAAjHxI=; h=Date:To:From:Subject:From; b=THJf9yrJsV+3TUpbiUCkRrZi1ibZr4ggxgy80RQvfhGaA+lBCCvyStqPniTqO9xOy 9Brr3l1gI3rsA2A7BZtcyjRhQ75zK399vy8ti9JzTUm798o9+smzlZP9gWhtSYYTSd ubb1RoBPZp+SfevxKbzAmV2Yz45QTa+QUiFmQ9fE= Date: Tue, 18 Oct 2022 16:14:26 -0700 To: mm-commits@vger.kernel.org, adobriyan@gmail.com, ivan@cloudflare.com, akpm@linux-foundation.org From: Andrew Morton Subject: + proc-report-open-files-as-size-in-stat-for-proc-pid-fd-v3.patch added to mm-nonmm-unstable branch Message-Id: <20221018231427.526CEC433C1@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: proc-report-open-files-as-size-in-stat-for-proc-pid-fd-v3 has been added to the -mm mm-nonmm-unstable branch. Its filename is proc-report-open-files-as-size-in-stat-for-proc-pid-fd-v3.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/proc-report-open-files-as-size-in-stat-for-proc-pid-fd-v3.patch This patch will later appear in the mm-nonmm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Ivan Babrou Subject: proc-report-open-files-as-size-in-stat-for-proc-pid-fd-v3 Date: Mon, 17 Oct 2022 21:58:44 -0700 use bitmap_weight() to count the bits Link: https://lkml.kernel.org/r/20221018045844.37697-1-ivan@cloudflare.com Signed-off-by: Ivan Babrou Cc: Alexey Dobriyan Signed-off-by: Andrew Morton --- fs/proc/fd.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) --- a/fs/proc/fd.c~proc-report-open-files-as-size-in-stat-for-proc-pid-fd-v3 +++ a/fs/proc/fd.c @@ -283,7 +283,7 @@ static int proc_readfd_count(struct inod { struct task_struct *p = get_proc_task(inode); struct fdtable *fdt; - unsigned int i, size, open_fds = 0; + unsigned int open_fds = 0; if (!p) return -ENOENT; @@ -293,10 +293,7 @@ static int proc_readfd_count(struct inod rcu_read_lock(); fdt = files_fdtable(p->files); - size = fdt->max_fds; - - for (i = size / BITS_PER_LONG; i > 0;) - open_fds += hweight64(fdt->open_fds[--i]); + open_fds = bitmap_weight(fdt->open_fds, fdt->max_fds); rcu_read_unlock(); } _ Patches currently in -mm which might be from ivan@cloudflare.com are proc-report-open-files-as-size-in-stat-for-proc-pid-fd.patch proc-report-open-files-as-size-in-stat-for-proc-pid-fd-v3.patch