From owner-freebsd-bugs@freebsd.org Tue Apr 16 20:59:13 2019 Return-Path: Delivered-To: freebsd-bugs@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 35ADD157D364 for ; Tue, 16 Apr 2019 20:59:13 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id B629977F9C for ; Tue, 16 Apr 2019 20:59:12 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id 6F582157D363; Tue, 16 Apr 2019 20:59:12 +0000 (UTC) Delivered-To: bugs@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 4B23D157D362 for ; Tue, 16 Apr 2019 20:59:12 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::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.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id B213377F99 for ; Tue, 16 Apr 2019 20:59:11 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id E6D8F15A8D for ; Tue, 16 Apr 2019 20:59:10 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id x3GKxALc048587 for ; Tue, 16 Apr 2019 20:59:10 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id x3GKxAjB048586 for bugs@FreeBSD.org; Tue, 16 Apr 2019 20:59:10 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 237321] vmx(4) iflib driver fails when number of CPU cores is not a power of two Date: Tue, 16 Apr 2019 20:59:10 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 12.0-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: ncrogers@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Apr 2019 20:59:13 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D237321 Bug ID: 237321 Summary: vmx(4) iflib driver fails when number of CPU cores is not a power of two Product: Base System Version: 12.0-STABLE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: ncrogers@gmail.com This is regarding the MFC of r343291 to 12-STABLE in r344027 (Convert vmx(4= ) to being an iflib driver.) If you configure a VMware ESXi guest with vmxnet3 interfaces and atypical number of CPU cores (e.g 6), the iflib/vmx(4) driver throws an error "device enable command failed" at bootup and periodically when trying to use the interface. This is because , for reasons I do not understand, the driver is unhappy when number of TX/RX queues is not a power of two. Because the driv= er defaults to 8 queues, whenever a guest boots with 6 cores iflib automatical= ly reduces the number of queues to equal the number of CPU cores. This is resolved by setting the number of tx/rx queues to 1,2, or 4, whiche= ver is less than or equal to the number of CPU cores. For example, on a 6 core system the following works: dev.vmx.0.iflib.override_ntxqs=3D4 dev.vmx.0.iflib.override_nrxqs=3D4 I believe either iflib or the vmx driver specifically needs to be corrected= to handle an irregular number of queues or limit it to powers of two when ther= e is fewer than 8 cores. Note that this for whatever reason does NOT happen in VMware Fusion under macOS, but seems to always happen in an ESXi environment. In all cases, hw.pci.honor_msi_blacklist is set to 0. --=20 You are receiving this mail because: You are the assignee for the bug.=