Avi Kivity wrote: > Anthony Liguori wrote: >> Avi Kivity wrote: >>> This is a request for testing of an experimental kvm feature that >>> dramatically accelerates some Windows releases (when running with >>> the ACPI HAL, and especially with guest SMP). The feature detects >>> accesses by the guest to the Task Priority Register (TPR) and >>> patches them at runtime to a kvm-friendly code snipped that is >>> provided by the BIOS. >>> >>> The upshot of all that is that >>> http://kvm.qumranet.com/kvmwiki/Windows_ACPI_Workaround is no longer >>> required, and Windows SMP no longer runs like a dog; it's quite >>> snappy from my very limited testing. >>> >>> Please download the test release from >>> http://people.qumranet.com/avi/tpr-opt-1.tar.gz and give it a spin. >>> Once it has received some exposure, I'll merge it into mainline. >>> >>> Credit for the original idea is due to Ben Serebrin. >>> >>> >> >> Sweet! >> >> I needed the following patch to compile. Will let you know how >> testing goes. >> > > I already applied that, plus another minor fix, so I recommend > re-downloading. Should have given it a new name.
What's the minor fix? During the second stage of installing winxp, I just got the following BUG(). Have to reboot to check and see if this is specific to your branch. [68630.390361] ------------[ cut here ]------------ [68630.390367] kernel BUG at /home/anthony/tmp/b/kernel/mmu.c:308! [68630.390370] invalid opcode: 0000 [1] SMP [68630.390372] CPU 1 [68630.390374] Modules linked in: kvm_intel kvm nfs lockd sunrpc tun i915 drm af_packet rfcomm l2cap thinkpad_acpi ppdev acpi_cpufreq cpufreq_stats cpufreq_ondemand freq_table cpufreq_userspace cpufreq_conservative cpufreq_powersave sbs ac battery bay dock container button video ipv6 bridge ipt_REJECT xt_state xt_tcpudp iptable_filter ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nfnetlink ip_tables x_tables sbp2 lp arc4 ecb blkcipher snd_hda_intel snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss joydev iwl4965 snd_seq_midi iwlwifi_mac80211 hci_usb snd_rawmidi snd_seq_midi_event snd_seq snd_timer bluetooth pcmcia cfg80211 usbhid hid sdhci mmc_core snd_seq_device serio_raw parport_pc parport yenta_socket rsrc_nonstatic pcmcia_core pcspkr psmouse snd soundcore intel_agp shpchp pci_hotplug snd_page_alloc evdev ext3 jbd mbcache sg sr_mod cdrom sd_mod ata_piix ohci1394 ieee1394 ata_generic libata scsi_mod ehci_hcd uhci_hcd usbcore e1000 thermal processor fan fuse apparmor commoncap [68630.390435] Pid: 15055, comm: qemu-system-x86 Not tainted 2.6.22-14-generic #1 [68630.390437] RIP: 0010:[<ffffffff8837f905>] [<ffffffff8837f905>] :kvm:mmu_memory_cache_alloc+0x25/0x30 [68630.390451] RSP: 0018:ffff810041e3b9b8 EFLAGS: 00010246 [68630.390453] RAX: 0000000000000000 RBX: ffffc2000109dea0 RCX: ffff81003f47c080 [68630.390456] RDX: ffff81003f47c088 RSI: 0000000000000028 RDI: ffff810042d103e0 [68630.390458] RBP: ffff81004eaf9460 R08: 0000000000000000 R09: 0000000000000004 [68630.390460] R10: 0000000003a94163 R11: 0000000000000000 R12: ffff810042d10000 [68630.390463] R13: 0000000000000000 R14: ffff81004eaf9460 R15: ffff810042d10000 [68630.390465] FS: 00002b08de4add40(0000) GS:ffff81000102c280(0000) knlGS:0000000000000000 [68630.390468] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [68630.390470] CR2: 0000000000010000 CR3: 00000000284ef000 CR4: 00000000000026e0 [68630.390473] Process qemu-system-x86 (pid: 15055, threadinfo ffff810041e3a000, task ffff81003b9346e0) [68630.390475] Stack: ffffc2000109dea0 ffffffff8837fa16 000000002149d043 0000000000000002 [68630.390480] 000000002149d000 ffffffff883801ad 00002b08df4e4000 0000000000003a94 [68630.390484] 0000000000000000 0000000000000000 0000000003a94000 0000000003a94000 [68630.390487] Call Trace: [68630.390496] [<ffffffff8837fa16>] :kvm:rmap_add+0xf6/0x110 [68630.390507] [<ffffffff883801ad>] :kvm:paging32_set_pte_common+0x10d/0x2b0 [68630.390523] [<ffffffff88380399>] :kvm:paging32_set_pte+0x49/0x50 [68630.390534] [<ffffffff883809dd>] :kvm:kvm_mmu_pte_write+0x33d/0x3b0 [68630.390553] [<ffffffff8837a6cd>] :kvm:emulator_write_emulated_onepage+0x9d/0x100 [68630.390564] [<ffffffff88382da8>] :kvm:x86_emulate_insn+0x5e8/0x4450 [68630.390574] [<ffffffff8855f467>] :kvm_intel:vmcs_readl+0x17/0x20 [68630.390586] [<ffffffff8837acff>] :kvm:emulate_instruction+0x1af/0x2f0 [68630.390596] [<ffffffff88562090>] :kvm_intel:handle_exception+0x240/0x2b0 [68630.390603] [<ffffffff88387aa9>] :kvm:apic_update_ppr+0x29/0x60 [68630.390615] [<ffffffff8837ca74>] :kvm:kvm_vcpu_ioctl+0xe54/0x11b0 [68630.390622] [<ffffffff8026e624>] add_to_page_cache_lru+0x24/0x40 [68630.390628] [<ffffffff8028f088>] shmem_getpage+0x298/0x7e0 [68630.390652] [<ffffffff802a84f5>] core_sys_select+0x275/0x300 [68630.390670] [<ffffffff80240719>] __dequeue_signal+0x19/0x1d0 [68630.390677] [<ffffffff8023ffce>] recalc_sigpending+0xe/0x30 [68630.390680] [<ffffffff8024212c>] dequeue_signal+0x5c/0x190 [68630.390685] [<ffffffff8024f4f9>] getnstimeofday+0x39/0xa0 [68630.390692] [<ffffffff802a6e05>] do_ioctl+0x35/0xe0 [68630.390698] [<ffffffff802a6f24>] vfs_ioctl+0x74/0x2d0 [68630.390705] [<ffffffff802a7215>] sys_ioctl+0x95/0xb0 [68630.390712] [<ffffffff80209e8e>] system_call+0x7e/0x83 [68630.390723] [68630.390724] [68630.390725] Code: 0f 0b eb fe 0f 1f 80 00 00 00 00 48 81 c7 e0 03 00 00 be 28 [68630.390733] RIP [<ffffffff8837f905>] :kvm:mmu_memory_cache_alloc+0x25/0x30 [68630.390742] RSP <ffff810041e3b9b8> ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
