From owner-svn-src-stable@freebsd.org Tue Jun 11 14:32:33 2019 Return-Path: Delivered-To: svn-src-stable@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 B3D5615BD005; Tue, 11 Jun 2019 14:32:33 +0000 (UTC) (envelope-from mav@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 5068D8F4DE; Tue, 11 Jun 2019 14:32:33 +0000 (UTC) (envelope-from mav@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 451FA2E7B; Tue, 11 Jun 2019 14:32:33 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x5BEWXFh020983; Tue, 11 Jun 2019 14:32:33 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x5BEWXIW020982; Tue, 11 Jun 2019 14:32:33 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201906111432.x5BEWXIW020982@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Tue, 11 Jun 2019 14:32:33 +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: r348925 - stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs X-SVN-Group: stable-12 X-SVN-Commit-Author: mav X-SVN-Commit-Paths: stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs X-SVN-Commit-Revision: 348925 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 5068D8F4DE X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.98 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.998,0]; NEURAL_HAM_SHORT(-0.98)[-0.980,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-1.000,0] X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 11 Jun 2019 14:32:33 -0000 Author: mav Date: Tue Jun 11 14:32:32 2019 New Revision: 348925 URL: https://svnweb.freebsd.org/changeset/base/348925 Log: MFC r348790: Fix comparison signedness in arc_is_overflowing(). When ARC size is very small, aggsum_lower_bound(&arc_size) may return negative values, that due to unsigned comparison caused delays, waiting for arc_adjust() to "fix" it by calling aggsum_value(&arc_size). Use of signed comparison there fixes the problem. Modified: stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c ============================================================================== --- stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Tue Jun 11 14:32:03 2019 (r348924) +++ stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Tue Jun 11 14:32:32 2019 (r348925) @@ -5140,7 +5140,7 @@ static boolean_t arc_is_overflowing(void) { /* Always allow at least one block of overflow */ - uint64_t overflow = MAX(SPA_MAXBLOCKSIZE, + int64_t overflow = MAX(SPA_MAXBLOCKSIZE, arc_c >> zfs_arc_overflow_shift); /* @@ -5152,7 +5152,7 @@ arc_is_overflowing(void) * in the ARC. In practice, that's in the tens of MB, which is low * enough to be safe. */ - return (aggsum_lower_bound(&arc_size) >= arc_c + overflow); + return (aggsum_lower_bound(&arc_size) >= (int64_t)arc_c + overflow); } static abd_t *