Author: sephe Date: Mon Mar 28 07:36:54 2016 New Revision: 297334 URL: https://svnweb.freebsd.org/changeset/base/297334
Log: vt: Use textmode when we're running on hypervisors The graphic mode is noticeably slow on hypervisors, especially on Hyper-V (1 second to each line). Submitted by: Dexuan Cui <decui microsoft com> Reviewed by: kib, sephe, royger (early loader version) MFC after: 1 week Sponsored by: Microsoft OSTC Differential Revision: https://reviews.freebsd.org/D5739 Modified: head/sys/dev/vt/hw/vga/vt_vga.c Modified: head/sys/dev/vt/hw/vga/vt_vga.c ============================================================================== --- head/sys/dev/vt/hw/vga/vt_vga.c Mon Mar 28 05:42:15 2016 (r297333) +++ head/sys/dev/vt/hw/vga/vt_vga.c Mon Mar 28 07:36:54 2016 (r297334) @@ -1214,7 +1214,6 @@ vga_init(struct vt_device *vd) if (vd->vd_softc == NULL) vd->vd_softc = (void *)&vga_conssoftc; sc = vd->vd_softc; - textmode = 0; if (vd->vd_flags & VDF_DOWNGRADE && vd->vd_video_dev != NULL) vga_pci_repost(vd->vd_video_dev); @@ -1229,6 +1228,13 @@ vga_init(struct vt_device *vd) bus_space_map(sc->vga_reg_tag, VGA_REG_BASE, VGA_REG_SIZE, 0, &sc->vga_reg_handle); + /* + * If "hw.vga.textmode" is not set and we're running on hypervisor, + * we use text mode by default, this is because when we're on + * hypervisor, vt(4) is usually much slower in graphics mode than + * in text mode, especially when we're on Hyper-V. + */ + textmode = vm_guest != VM_GUEST_NO; TUNABLE_INT_FETCH("hw.vga.textmode", &textmode); if (textmode) { vd->vd_flags |= VDF_TEXTMODE; _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
