From owner-svn-src-all@freebsd.org Wed Aug 19 13:44:08 2020 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id D36A13BF341; Wed, 19 Aug 2020 13:44:08 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4BWpsh5JfTz3Zd5; Wed, 19 Aug 2020 13:44:08 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 9A36C23862; Wed, 19 Aug 2020 13:44:08 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 07JDi80M072124; Wed, 19 Aug 2020 13:44:08 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 07JDi8mT072123; Wed, 19 Aug 2020 13:44:08 GMT (envelope-from markj@FreeBSD.org) Message-Id: <202008191344.07JDi8mT072123@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Wed, 19 Aug 2020 13:44:08 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r364392 - stable/12/sys/compat/linprocfs X-SVN-Group: stable-12 X-SVN-Commit-Author: markj X-SVN-Commit-Paths: stable/12/sys/compat/linprocfs X-SVN-Commit-Revision: 364392 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 19 Aug 2020 13:44:08 -0000 Author: markj Date: Wed Aug 19 13:44:08 2020 New Revision: 364392 URL: https://svnweb.freebsd.org/changeset/base/364392 Log: MFC r364168: linprocfs: Fix some inaccuracies in meminfo. PR: 248463 Modified: stable/12/sys/compat/linprocfs/linprocfs.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/compat/linprocfs/linprocfs.c ============================================================================== --- stable/12/sys/compat/linprocfs/linprocfs.c Wed Aug 19 13:35:32 2020 (r364391) +++ stable/12/sys/compat/linprocfs/linprocfs.c Wed Aug 19 13:44:08 2020 (r364392) @@ -145,41 +145,35 @@ static int linprocfs_domeminfo(PFS_FILL_ARGS) { unsigned long memtotal; /* total memory in bytes */ - unsigned long memused; /* used memory in bytes */ unsigned long memfree; /* free memory in bytes */ - unsigned long buffers, cached; /* buffer / cache memory ??? */ + unsigned long cached; /* page cache */ + unsigned long buffers; /* buffer cache */ unsigned long long swaptotal; /* total swap space in bytes */ unsigned long long swapused; /* used swap space in bytes */ unsigned long long swapfree; /* free swap space in bytes */ - int i, j; + size_t sz; + int error, i, j; memtotal = physmem * PAGE_SIZE; - /* - * The correct thing here would be: - * - memfree = vm_free_count() * PAGE_SIZE; - memused = memtotal - memfree; - * - * but it might mislead linux binaries into thinking there - * is very little memory left, so we cheat and tell them that - * all memory that isn't wired down is free. - */ - memused = vm_wire_count() * PAGE_SIZE; - memfree = memtotal - memused; + memfree = (unsigned long)vm_free_count() * PAGE_SIZE; swap_pager_status(&i, &j); swaptotal = (unsigned long long)i * PAGE_SIZE; swapused = (unsigned long long)j * PAGE_SIZE; swapfree = swaptotal - swapused; + /* - * We'd love to be able to write: - * - buffers = bufspace; - * - * but bufspace is internal to vfs_bio.c and we don't feel - * like unstaticizing it just for linprocfs's sake. + * This value may exclude wired pages, but we have no good way of + * accounting for that. */ - buffers = 0; - cached = vm_inactive_count() * PAGE_SIZE; + cached = + (vm_active_count() + vm_inactive_count() + vm_laundry_count()) * + PAGE_SIZE; + + sz = sizeof(buffers); + error = kernel_sysctlbyname(curthread, "vfs.bufspace", &buffers, &sz, + NULL, 0, 0, 0); + if (error != 0) + buffers = 0; sbuf_printf(sb, "MemTotal: %9lu kB\n"