Date: Tue, 28 May 2013 14:33:19 -0700 From: Colin Percival <cperciva@freebsd.org> To: Matt Wilson <msw@amazon.com>, =?ISO-8859-1?Q?Roger_Pau_Monn=E9?= <roger.pau@citrix.com> Cc: "freebsd-xen@freebsd.org" <freebsd-xen@freebsd.org>, xen-devel <xen-devel@lists.xen.org>, "freebsd-virtualization@freebsd.org" <freebsd-virtualization@freebsd.org>, "xen-users@lists.xen.org" <xen-users@lists.xen.org> Subject: Re: [Xen-devel] FreeBSD PVHVM call for testing Message-ID: <51A5229F.80205@freebsd.org> In-Reply-To: <20130528191855.GA13736@u109add4315675089e695.ant.amazon.com> References: <51957D42.9060801@citrix.com> <51959ED9.6040405@freebsd.org> <51974EC9.9030204@citrix.com> <5197A1EA.2040404@freebsd.org> <519CAFC7.1070908@citrix.com> <519D24A9.3050407@freebsd.org> <519DDC0A.9000201@citrix.com> <519E6958.6020606@freebsd.org> <519F3CD0.5090405@citrix.com> <51A4D804.9050208@citrix.com> <20130528191855.GA13736@u109add4315675089e695.ant.amazon.com>
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On 05/28/13 12:18, Matt Wilson wrote: > VCPUOP_set_singleshot_timer returns -EINVAL when: > > 1) the specified vCPU ID is out of range (<0 or >MAX_VIRT_CPUS) > 2) the specified vCPU ID doesn't match the running vCPU. > > It seems that there is a confusion between the logical vCPU ID and the > local APIC physical ID. > [...] > (XEN) Domain 1 (vcpu#16) VCPUOP_set_singleshot_timer specified vcpuid 1 > [...] > APIC: CPU 1 has ACPI ID 16 Thanks Matt! Looks like we need to pass our acpi_id to the Xen hypercall instead of our cpuid. Roger, changing the line int cpu = PCPU_GET(cpuid); to int cpu = PCPU_GET(acpi_id); in xentimer_et_start and xentimer_et_stop fixes this panic and gets me slightly further; the following lines are now added to the console output prior to the system appearing to hang: > ioapic0: routing intpin 1 (ISA IRQ 1) to lapic 1 vector 48 > ioapic0: routing intpin 4 (ISA IRQ 4) to lapic 2 vector 48 > ioapic0: routing intpin 9 (ISA IRQ 9) to lapic 3 vector 48 > ioapic0: routing intpin 12 (ISA IRQ 12) to lapic 4 vector 48 > ioapic0: routing intpin 14 (ISA IRQ 14) to lapic 5 vector 48 > ioapic0: routing intpin 15 (ISA IRQ 15) to lapic 6 vector 48 > ioapic0: routing intpin 28 (PCI IRQ 28) to lapic 7 vector 48 > TSC timecounter discards lower 1 bit(s) > Timecounter "TSC-low" frequency 1300024860 Hz quality -100 > WARNING: WITNESS option enabled, expect reduced performance. On a cc2.8xlarge EC2 instance, the lines which come after this are > GEOM: new disk xbd1 > GEOM: new disk xbd2 > GEOM: new disk xbd3 > GEOM: new disk xbd4 > Trying to mount root from ufs:/dev/ad0a [rw]... > start_init: trying /sbin/init and then the userland boot process; have you made any bug fixes after your pvhvm_v7 which would explain why tasting disks was hanging? -- Colin Percival Security Officer Emeritus, FreeBSD | The power to serve Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid
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