From owner-svn-src-head@freebsd.org Mon Feb 18 21:27:14 2019 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 97A3C14EC667; Mon, 18 Feb 2019 21:27:14 +0000 (UTC) (envelope-from glebius@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) server-signature RSA-PSS (4096 bits) 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 318FB86E5A; Mon, 18 Feb 2019 21:27:14 +0000 (UTC) (envelope-from glebius@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 22A35B8EB; Mon, 18 Feb 2019 21:27:14 +0000 (UTC) (envelope-from glebius@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x1ILREMf055772; Mon, 18 Feb 2019 21:27:14 GMT (envelope-from glebius@FreeBSD.org) Received: (from glebius@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x1ILRDJL055771; Mon, 18 Feb 2019 21:27:14 GMT (envelope-from glebius@FreeBSD.org) Message-Id: <201902182127.x1ILRDJL055771@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: glebius set sender to glebius@FreeBSD.org using -f From: Gleb Smirnoff Date: Mon, 18 Feb 2019 21:27:13 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r344269 - head/lib/libmemstat X-SVN-Group: head X-SVN-Commit-Author: glebius X-SVN-Commit-Paths: head/lib/libmemstat X-SVN-Commit-Revision: 344269 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 318FB86E5A X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.97 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_SHORT(-0.97)[-0.973,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-0.999,0] X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 Feb 2019 21:27:14 -0000 Author: glebius Date: Mon Feb 18 21:27:13 2019 New Revision: 344269 URL: https://svnweb.freebsd.org/changeset/base/344269 Log: With r343051 UMA switched from atomic counts to counter(9) and now kernel reports snap counts of how much a zone alloced and how much it freed. It may happen that snap values doesn't match, e.g alloced - freed < 0. Workaround that in memstat library. Reported by: pho Modified: head/lib/libmemstat/memstat_uma.c Modified: head/lib/libmemstat/memstat_uma.c ============================================================================== --- head/lib/libmemstat/memstat_uma.c Mon Feb 18 20:29:19 2019 (r344268) +++ head/lib/libmemstat/memstat_uma.c Mon Feb 18 21:27:13 2019 (r344269) @@ -213,6 +213,15 @@ retry: mtp->mt_numfrees += upsp->ups_frees; } + /* + * Values for uth_allocs and uth_frees frees are snap. + * It may happen that kernel reports that number of frees + * is greater than number of allocs. See counter(9) for + * details. + */ + if (mtp->mt_numallocs < mtp->mt_numfrees) + mtp->mt_numallocs = mtp->mt_numfrees; + mtp->mt_size = uthp->uth_size; mtp->mt_rsize = uthp->uth_rsize; mtp->mt_memalloced = mtp->mt_numallocs * uthp->uth_size;