From owner-svn-src-head@FreeBSD.ORG Mon Mar 16 09:16:01 2015 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 1673C5E5; Mon, 16 Mar 2015 09:16:01 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id DC8B7CCA; Mon, 16 Mar 2015 09:16:00 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id t2G9G0Yn095358; Mon, 16 Mar 2015 09:16:00 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id t2G9G01e095354; Mon, 16 Mar 2015 09:16:00 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201503160916.t2G9G01e095354@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Mon, 16 Mar 2015 09:16:00 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r280133 - head/usr.sbin/bhyve X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.18-1 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, 16 Mar 2015 09:16:01 -0000 Author: mav Date: Mon Mar 16 09:15:59 2015 New Revision: 280133 URL: https://svnweb.freebsd.org/changeset/base/280133 Log: Increase S/G list size of 32 to 33 entries. 32 entries are not enough for the worst case of misaligned 128KB request, that made FreeBSD to chunk large quests in odd pieces. MFC after: 2 weeks Modified: head/usr.sbin/bhyve/block_if.h head/usr.sbin/bhyve/pci_virtio_block.c Modified: head/usr.sbin/bhyve/block_if.h ============================================================================== --- head/usr.sbin/bhyve/block_if.h Mon Mar 16 01:15:08 2015 (r280132) +++ head/usr.sbin/bhyve/block_if.h Mon Mar 16 09:15:59 2015 (r280133) @@ -39,7 +39,7 @@ #include #include -#define BLOCKIF_IOV_MAX 32 /* not practical to be IOV_MAX */ +#define BLOCKIF_IOV_MAX 33 /* not practical to be IOV_MAX */ struct blockif_req { struct iovec br_iov[BLOCKIF_IOV_MAX]; Modified: head/usr.sbin/bhyve/pci_virtio_block.c ============================================================================== --- head/usr.sbin/bhyve/pci_virtio_block.c Mon Mar 16 01:15:08 2015 (r280132) +++ head/usr.sbin/bhyve/pci_virtio_block.c Mon Mar 16 09:15:59 2015 (r280133) @@ -55,8 +55,6 @@ __FBSDID("$FreeBSD$"); #define VTBLK_RINGSZ 64 -#define VTBLK_MAXSEGS 32 - #define VTBLK_S_OK 0 #define VTBLK_S_IOERR 1 #define VTBLK_S_UNSUPP 2 @@ -201,10 +199,10 @@ pci_vtblk_proc(struct pci_vtblk_softc *s int iolen; int writeop, type; off_t offset; - struct iovec iov[VTBLK_MAXSEGS + 2]; - uint16_t idx, flags[VTBLK_MAXSEGS + 2]; + struct iovec iov[BLOCKIF_IOV_MAX + 2]; + uint16_t idx, flags[BLOCKIF_IOV_MAX + 2]; - n = vq_getchain(vq, &idx, iov, VTBLK_MAXSEGS + 2, flags); + n = vq_getchain(vq, &idx, iov, BLOCKIF_IOV_MAX + 2, flags); /* * The first descriptor will be the read-only fixed header, @@ -214,7 +212,7 @@ pci_vtblk_proc(struct pci_vtblk_softc *s * XXX - note - this fails on crash dump, which does a * VIRTIO_BLK_T_FLUSH with a zero transfer length */ - assert(n >= 2 && n <= VTBLK_MAXSEGS + 2); + assert(n >= 2 && n <= BLOCKIF_IOV_MAX + 2); io = &sc->vbsc_ios[idx]; assert((flags[0] & VRING_DESC_F_WRITE) == 0); @@ -347,7 +345,7 @@ pci_vtblk_init(struct vmctx *ctx, struct /* setup virtio block config space */ sc->vbsc_cfg.vbc_capacity = size / DEV_BSIZE; /* 512-byte units */ sc->vbsc_cfg.vbc_size_max = 0; /* not negotiated */ - sc->vbsc_cfg.vbc_seg_max = VTBLK_MAXSEGS; + sc->vbsc_cfg.vbc_seg_max = BLOCKIF_IOV_MAX; sc->vbsc_cfg.vbc_geometry.cylinders = 0; /* no geometry */ sc->vbsc_cfg.vbc_geometry.heads = 0; sc->vbsc_cfg.vbc_geometry.sectors = 0;