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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [GIT PULL] x86/mm changes for v3.9-rc1
On 22/02/13 17:53, Yinghai Lu wrote: > On Fri, Feb 22, 2013 at 9:24 AM, Konrad Rzeszutek Wilk > <konrad.wilk@xxxxxxxxxx> wrote: >> On Fri, Feb 22, 2013 at 11:55:31AM -0500, Konrad Rzeszutek Wilk wrote: >>> On Thu, Feb 21, 2013 at 04:34:06PM -0800, H. Peter Anvin wrote: >>>> Hi Linus, >>>> >>>> This is a huge set of several partly interrelated (and concurrently >>>> developed) changes, which is why the branch history is messier than >>>> one would like. >>>> >>>> The *really* big items are two humonguous patchsets mostly developed >>>> by Yinghai Lu at my request, which completely revamps the way we >>>> create initial page tables. In particular, rather than estimating how >>>> much memory we will need for page tables and then build them into that >>>> memory -- a calculation that has shown to be incredibly fragile -- we >>>> now build them (on 64 bits) with the aid of a "pseudo-linear mode" -- >>>> a #PF handler which creates temporary page tables on demand. >>>> >>>> This has several advantages: >>>> >>>> 1. It makes it much easier to support things that need access to >>>> data very early (a followon patchset uses this to load microcode >>>> way early in the kernel startup). >>>> >>>> 2. It allows the kernel and all the kernel data objects to be invoked >>>> from above the 4 GB limit. This allows kdump to work on very large >>>> systems. >>>> >>>> 3. It greatly reduces the difference between Xen and native (Xen's >>>> equivalent of the #PF handler are the temporary page tables created >>>> by the domain builder), eliminating a bunch of fragile hooks. >>>> >>>> The patch series also gets us a bit closer to W^X. >>>> >>>> Additional work in this pull is the 64-bit get_user() work which you >>>> were also involved with, and a bunch of cleanups/speedups to >>>> __phys_addr()/__pa(). >>> Looking at figuring out which of the patches in the branch did this, but >>> with this merge I am getting a crash with a very simple PV guest (booted >>> with >>> one 1G): >>> >>> Call Trace: >>> [<ffffffff8103feba>] xen_get_user_pgd+0x5a <-- >>> [<ffffffff8103feba>] xen_get_user_pgd+0x5a >>> [<ffffffff81042d27>] xen_write_cr3+0x77 >>> [<ffffffff81ad2d21>] init_mem_mapping+0x1f9 >>> [<ffffffff81ac293f>] setup_arch+0x742 >>> [<ffffffff81666d71>] printk+0x48 >>> [<ffffffff81abcd62>] start_kernel+0x90 >>> [<ffffffff8109416b>] __add_preferred_console.clone.1+0x9b >>> [<ffffffff81abc5f7>] x86_64_start_reservations+0x2a >>> [<ffffffff81abf0c7>] xen_start_kernel+0x564 >>> >>> And the hypervisor says: >>> (XEN) d7:v0: unhandled page fault (ec=0000) >>> (XEN) Pagetable walk from ffffea000005b2d0: >>> (XEN) L4[0x1d4] = 0000000000000000 ffffffffffffffff >>> (XEN) domain_crash_sync called from entry.S >>> (XEN) Domain 7 (vcpu#0) crashed on cpu#3: >>> (XEN) ----[ Xen-4.2.0 x86_64 debug=n Not tainted ]---- >>> (XEN) CPU: 3 >>> (XEN) RIP: e033:[<ffffffff8103feba>] >>> (XEN) RFLAGS: 0000000000000206 EM: 1 CONTEXT: pv guest >>> (XEN) rax: ffffea0000000000 rbx: 0000000001a0c000 rcx: 0000000080000000 >>> (XEN) rdx: 000000000005b2a0 rsi: 0000000001a0c000 rdi: 0000000000000000 >>> (XEN) rbp: ffffffff81a01dd8 rsp: ffffffff81a01d90 r8: 0000000000000000 >>> (XEN) r9: 0000000010000001 r10: 0000000000000000 r11: 0000000000000000 >>> (XEN) r12: 0000000000000000 r13: 0000001000000000 r14: 0000000000000000 >>> (XEN) r15: 0000000000100000 cr0: 000000008005003b cr4: 00000000000406f0 >>> (XEN) cr3: 0000000411165000 cr2: ffffea000005b2d0 >>> (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: e02b cs: e033 >>> (XEN) Guest stack trace from rsp=ffffffff81a01d90: >>> (XEN) 0000000080000000 0000000000000000 0000000000000000 ffffffff8103feba >>> (XEN) 000000010000e030 0000000000010006 ffffffff81a01dd8 000000000000e02b >> Here is a better serial log of the crash (just booting a normal Xen 4.1 + >> initial >> kernel with 8GB): >> >> PXELINUX 3.82 2009-06-09 Copyright (C) 1994-2009 H. Peter Anvin et al >> boot: >> Loading xen.gz... ok >> Loading vmlinuz... ok >> Loading initramfs.cpio.gz... ok >> __ __ _ _ _ ____ >> \ \/ /___ _ __ | || | / | | ___| _ __ _ __ ___ >> \ // _ \ '_(_)_(_)____/ | .__/|_| \___| >> |_| >> (XEN) Xen version 4.1.5-pre (konrad@xxxxxxxxxxxx) (gcc version 4.4.4 >> 20100503 (Red Hat 4.4.4-2) (GCC) ) Fri Feb 22 11:37:00 EST 2013 >> (XEN) Latest ChangeSet: Fri Feb 15 15:31:55 2013 +0100 23459:9f12bdd6b7f0 >> (XEN) Console output is synchronous. >> (XEN) Bootloader: unknown >> (XEN) Command line: cpuinfo conring_size=1048576 sync_console >> cpufreq=verbose com1=115200,8n1 console=com1,vga loglvl=all guest_loglvl=all >> (XEN) Video information: >> (XEN) VGA is text mode 80x25, font 8x16 >> (XEN) VBE/DDC methods: none; EDID transfer time: 0 seconds >> (XEN) EDID info not retrieved because no DDC retrieval method detected >> (XEN) Disc information: >> (XEN) Found 1 MBR signatures >> (XEN) Found 1 EDD information structures >> (XEN) Xen-e820 RAM map: >> (XEN) 0000000000000000 - 000000000009ec00 (usable) >> (XEN) 000000000009ec00 - 00000000000a0000 (reserved) >> (XEN) 00000000000e0000 - 0000000000100000 (reserved) >> (XEN) 0000000000100000 - 0000000020000000 (usable) >> (XEN) 0000000020000000 - 0000000020200000 (reserved) >> (XEN) 0000000020200000 - 0000000040000000 (usable) >> (XEN) 0000000040000000 - 0000000040200000 (reserved) >> (XEN) 0000000040200000 - 00000000bad80000 (usable) >> (XEN) 00000000bad80000 - 00000000badc9000 (ACPI NVS) >> (XEN) 00000000badc9000 - 00000000badd1000 (ACPI data) >> (XEN) 00000000badd1000 - 00000000badf4000 (reserved) >> (XEN) 00000000badf4000 - 00000000badf6000 (usable) >> (XEN) 00000000badf6000 - 00000000bae06000 (reserved) >> (XEN) 00000000bae06000 - 00000000bae14000 (ACPI NVS) >> (XEN) 00000000bae14000 - 00000000bae3c000 (reserved) >> (XEN) 00000000bae3c000 - 00000000bae7f000 (ACPI NVS) >> (XEN) 00000000bae7f000 - 00000000bb000000 (usable) >> (XEN) 00000000bb800000 - 00000000bfa00000 (reserved) >> (XEN) 00000000fed1c000 - 00000000fed40000 (reserved) >> (XEN) 00000000ff000000 - 0000000100000000 (reserved) >> (XEN) 0000000100000000 - 000000023fe00000 (usable) >> (XEN) ACPI: RSDP 000F0450, 0024 (r2 ALASKA) >> (XEN) ACPI: XSDT BADC9068, 0054 (r1 ALASKA A M I 1072009 AMI 10013) >> (XEN) PROC 1 MSFT 3000001) >> (XEN) ACPI: MCFG BADD0580, 003C (r1 ALASKA A M I 1072009 MSFT 97) >> (XEN) ACPI: HPET BADD05C0, 0038 (r1 ALASKA A M I 1072009 AMI. 4) >> (XEN) ACPI: ASF! BADD05F8, 00A0 (r32 INTEL HCG 1 TFSM F4240) >> (XEN) System RAM: 8104MB (8299140kB) >> (XEN) No NUMA configuration found >> (XEN) Faking a node at 0000000000000000-000000023fe00000 >> (XEN) Domain heap initialised >> (XEN) found SMP MP-table at 000fcde0 >> (XEN) DMI 2.7 present. >> (XEN) Using APIC driver default >> (XEN) ACPI: PM-Timer IO Port: 0x408 >> (XEN) ACPI: ACPI SLEEP INFO: pm1x_cnt[404,0], pm1x_evt[400,0] >> (XEN) ACPI: 32/64X FACS address mismatch in FADT - >> bae0bf80/0000000000000000, using 32 >> (XEN) ACPI: wakeup_vec[bae0bf8c], vec_size[20] >> (XEN) ACPI: Local APIC address 0xfee00000 >> (XEN) ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) >> (XEN) Processor #0 6:10 APIC version 21 >> (XEN) ACPI: LAPIC (acpi_id[0x02] lapic_id[0x02] enabled) >> (XEN) Processor #2 6:10 APIC version 21 >> (XEN) ACPI: LAPIC (acpi_id[0x03] lapic_id[0x01] enabled) >> (XEN) Processor #1 6:10 APIC version 21 >> (XEN) ACPI: LAPIC (acpi_id[0x04] lapic_id[0x03] enabled) >> (XEN) Processor #3 6:10 APIC version 21 >> (XEN) ACPI: LAPIC_NMI (acpi_id[0xff] high edge lint[0x1]) >> (XEN) ACPI: IOAPIC (id[0x00] address[0xfec00000] gsi_base[0]) >> (XEN) IOAPIC[0]: apic_id 0, version 32, address 0xfec00000, GSI 0-23 >> (XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) >> (XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) >> (XEN) ACPI: IRQ0 used by override. >> (XEN) ACPI: IRQ2 used by override. >> (XEN) ACPI: IRQ9 used by override. >> (XEN) Enabling APIC mode: Flat. Using 1 I/O APICs >> (XEN) ACPI: HPET id: 0x8086a701 base: 0xfed00000 >> (XEN) PCI: MCFG configuration 0: base e0000000 segment 0 buses 0 - 255 >> (XEN) PCI: Not using MMCONFIG. >> (XEN) Table is not found! >> (XEN) Using ACPI (MADT) for SMP configuration information >> (XEN) IRQ limits: 24 GSI, 760 MSI/MSI-X >> (XEN) Using scheduler: SMP Credit Scheduler (credit) >> (XEN) Initializing CPU#0 >> (XEN) Detected 3093.067 MHz processor. >> (XEN) Initing memory sharing. >> (XEN) CPU: Physical Processor ID: 0 >> (XEN) CPU: Processor Core ID: 0 >> (XEN) CPU: L1 I cache: 32K, L1 D cache: 32K >> (XEN) CPU: L2 cache: 256K >> (XEN) CPU: L3 cache: 3072K >> (XEN) mce_intel.c:1162: MCA Capability: BCAST 1 SER 0 CMCI 1 firstbank 0 >> extended MCE MSR 0 >> (XEN) CPU0: Thermal monitoring enabled (TM1) >> (XEN) Intel machine check reporting enabled >> (XEN) I/O virtualisation disabled >> (XEN) CPU0: Intel(R) Core(TM) i3-2100 CPU @ 3.10GHz stepping 07 >> (XEN) Enabled directed EOI with ioapic_ack_old on! >> (XEN) ENABLING IO-APIC IRQs >> (XEN) -> Using old ACK method >> (XEN) ..TIMER: vector=0xF0 apic1=0 pin1=2 apic2=-1 pin2=-1 >> (XEN) TSC deadline timer enabled >> (XEN) Platform timer is 14.318MHz HPET >> (XEN) Allocated console ring of 1048576 KiB. >> (XEN) VMX: Supported advanced features: >> (isation >> (XEN) - APIC TPR shadow >> (XEN) - Extended Page Tables (EPT) >> (XEN) - Virtual-Processor Identifiers (VPID) >> (XEN) - Virtual NMI >> (XEN) - MSR direct-access bitmap >> (XEN) - Unrestricted Guest >> (XEN) HVM: ASIDs enabled. >> (XEN) HVM: VMX enabled >> (XEN) HVM: Hardware Assisted Paging (HAP) detected >> (XEN) HVM: HAP page sizes: 4kB, 2MB >> (XEN) Booting processor 1/1 eip 7c000 >> (XEN) Initializing CPU#1 >> (XEN) CPU: Physical Processor ID: 0 >> (XEN) CPU: Processor Core ID: 0 >> (XEN) CPU: L1 I cache: 32K, L1 D >> (XEN) Initializing CPU#2 >> (XEN) CPU: Physical Processor ID: 0 >> (XEN) CPU: Processor Core ID: 1 >> (XEN) CPU: L1 I cache: 32K, L1 D cache: 32K >> (XEN) CPU: L2 cache: 256K >> (XEN) CPU: L3 cache: 3072K >> (XEN) CPU2: Thermal monitoring enabled (TM1) >> (XEN) CPU2: Intel(R) Core(TM) i3-2100 CPU @ 3.10GHz stepping 07 >> (XEN) Booting processor 3/3 eip 7c000 >> (XEN) Initializing CPU#3 >> (XEN) CPU: Physical Processor ID: 0 >> (XEN) CPU: Processor Core ID: 1 >> (XEN) CPU: L1 I cache: 32K, L1 D100 CPU @ 3.10GHz stepping 07 >> (XEN) Brought up 4 CPUs >> (XEN) ACPI sleep modes: S3 >> (XEN) mcheck_poll: Machine check polling timer started. >> (XEN) *** LOADING DOMAIN 0 *** >> (XEN) elf_parse_binary: phdr: paddr=0x1000000 memsz=0x9e0000 >> (XEN) elf_parse_binary: phdr: paddr=0x1a00000 memsz=0xa60f0 >> (XEN): paddr=0x1abc000 memsz=0x61b000 >> (XEN) elf_parse_binary: memory: 0x1000000 -> 0x20d7000 >> (XEN) elf_xen_parse_note: GUEST_OS = "linux" >> (XEN) elf_xen_parse_note: GUEST_VERSION = "2.6" >> (XEN) elf_xen_parse_note: XEN_VERSION = "xen-3.0" >> (XEN) elf_xen_parse_note: VIRT_BASE = 0xffffffff80000000 >> (XEN) elf_xen_parse_note: ENTRY = 0xffffffff81abc1e0 >> (XEN) elf_xen_parse_note: HYPERCALL_PAGE = 0xffffffff81001000 >> (XEN) elf_xen_parse_note: FEATURES = >> "!writable_page_tables|pae_pgdir_above_4gb" >> (XEN) elf_xen_parse_note: PAE_MODE = "yes" >> (XEN) elf_xen_parse_note: LOADER = "generic" >> (XEN) elf_xen_parse_note: unknown xen elf note (0xd) >> (XEN) elf_xen_parse_note: SUSPEND_CANCEL = 0x1 >> (XEN) elf_xen_parse_note: HV_START_LOW = 0xffff800000000000 >> (XEN) elf_xen_parse_note: PADDR_OFFSET = 0x0 >> (XEN) elf_xen_addr_calc_check: addresses: >> (XEN) virt_base = 0xffffffff80000000 >> (XEN) elf_paddr_offset = 0x0 >> (XEN) virt_offset = 0xffffffff80000000 >> (XEN) virt_kstart = 0xffffffff81000000 >> (XEN) virt_kend = 0xffffffff820d7000 >> (XEN) virt_entry = 0xffffffff81abc1e0 >> (XEN) p2m_base = 0xffffffffffffffff >> (XEN) Xen kernel: 64-bit, lsb, compat32 >> (XEN) Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x20d7000 >> (XEN) PHYSICAL MEMORY ARRANGEMENT: >> (XEN) Dom0 alloc.: 0000000220000000->0000000224000000 (1661249 pages to >> be allocated) >> (XEN) Init. ramdisk: 000000022cbdc000->000000023fe00000 >> (XEN) VIRTUAL MEMORY ARRANGEMENT: >> (XEN) Loaded kernel: ffffffff81000000->ffffffff820d7000 >> (XEN) Init. ramdisk: ffffffff820d7000->ffffffff952fb000 >> (XEN) Phys-Mach map: ffffffff952fb000->ffffffff96060b28 >> (XEN) Start info: ffffffff96061000->ffffffff960614b4 >> (XEN) Page tables: ffffffff96062000->ffffffff96117000 >> (XEN) Boot stack: ffffffff96117000->ffffffff96118000 >> (XEN) TOTAL: ffffffff80000000->ffffffff96400000 >> (XEN) ENTRY ADDRESS: ffffffff81abc1e0 >> (XEN) Dom0 has maximum 4 VCPUs >> (XEN) elf_load_binary: phdr 0 at 0xffffffff81000000 -> 0xffffffff819e0000 >> (XEN) elf_load_binary: phdr 1 at 0xffffffff81a00000 -> 0xffffffff81aa60f0 >> (XEN) elf_load_binary: phdr 2 at 0xffffffff81aa7000 -> 0xffffffff81abbbc0 >> (XEN) elf_load_binary: phdr 3 at 0xffffffff81abc000 -> 0xffffffff81baf000 >> (XEN) Scrubbing Free RAM: .done. >> (XEN) Xen trace buffers: disabled >> (XEN) Std. Loglevel: All >> (XEN) Guest Loglevel: All >> (XEN) ***************************intended to aid debugging of Xen by ensuring >> (XEN) ******* that all output is synchronously delivered on the serial line. >> (XEN) ******* However it can introduce SIGNIFICANT latencies and affect >> (XEN) ******* timekeeping. It is NOT recommended for production use! >> (XEN) ********************************************** >> (XEN) 3... 2... 1... >> (XEN) Xen is relinquishing VGA console. >> (XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to >> Xen) >> (XEN) Freed 224kB init memory. >> mapping kernel into physical memory >> about to get started... >> [ 0.000000] Initializing cgroup subsys cpuset >> [ 0.000000] Initializing cgroup subsys cpu >> [ 0.000000] Linux version 3.8.0upstream-06471-g2ef14f4-dirty >> (konrad@xxxxxxxxxxxxxxxxxx) (gcc version 4.4.4 20100503 (Red Hat 4.4.4-2) >> (GCC) ) #1 SMP Fri Feb 22 11:36:48 EST 2013 >> [ 0.000000] Command line: initcall_debug debug console=hvc0 loglevel=10 >> xen-pciback.hide=(01:00.0) earlyprintk=xen >> [ 0.000000] Freeing 9e-100 pfn range: 98 pages freed >> [ 0.000000] 1-1 mapping on 9e->100 >> [ 0.000000] Freeing 20000-20200 pfn range: 512 pages freed >> [ 0.000000] 1-1 mapping on 20000->20200 >> [ 0.000000] Freeing 40000-40200 pfn range: 512 pages freed >> [ 0.000000] 1-1 mapping on 40000->40200 >> [ 0.000000] Freeing bad80-badf4 pfn range: 116 pages freed >> [ 0.000000] 1-1 mapping on bad80->badf4 >> [ 0.000000] Freeing badf6-bae7f pfn range: 137 pages freed >> [ 0.000000] 1-1 mapping on badf6->bae7f >> [ 0.000000] Freeing bb000-100000 pfn range: 282624 pages freed >> [ 0.000000] 1-1 mapping on bb000->100000 >> [ 0.000000] Released 283999 pages of unused memory >> [ 0.000000] Set 283999 page(s) to 1-1 mapping >> [ 0.000000] Populating 1acb65-1f20c4 pfn range: 283999 pages added >> [ 0.000000] e820: BIOS-provided physical RAM map: >> [ 0.000000] Xen: [mem 0x0000000000000000-0x000000000009dfff] usable >> [ 0.000000] Xen: [mem 0x000000000009ec00-0x00000000000fffff] reserved >> [ 0.000000] Xen: [mem 0x0000000000100000-0x000000001fffffff] usable >> [ 0.000000] Xen: [mem 0x0000000020000000-0x00000000201fffff] reserved >> [ 0.000000] Xen: [mem 0x0000000020200000-0x000000003fffffff] usable >> [ 0.000000] Xen: [mem 0x0000000040000000-0x00000000401fffff] reserved >> [ 0.000000] Xen: [mem 0x0000000040200000-0x00000000bad7ffff] usable >> [ 0.000000] Xen: [mem 0x00000000bad80000-0x00000000badc8fff] ACPI NVS >> [ 0.000000] Xen: [mem 0x00000000badc9000-0x00000000badd0fff] ACPI data >> [ 0.000000] Xen: [mem 0x00000000badd1000-0x00000000badf3fff] reserved >> [ 0.000000] Xen: [mem 0x00000000badf4000-0x00000000badf5fff] usable >> [ 0.000000] Xen: [mem 0x00000000badf6000-0x00000000bae05fff] reserved >> [ 0.000000] Xen: [mem 0x00000000bae06000-0x00000000bae13fff] ACPI NVS >> [ 0.000000] Xen: [mem 0x00000000bae14000-0x00000000bae3bfff] reserved >> [ 0.000000] Xen: [mem 0x00000000bae3c000-0x00000000bae7efff] ACPI NVS >> [ 0.000000] Xen: [mem 0x00000000bae7f000-0x00000000baffffff] usable >> [ 0.000000] Xen: [mem 0x00000000bb800000-0x00000000bf9fffff] reserved >> [ 0.000000] Xen: [mem 0x00000000fec00000-0x00000000fec00fff] reserved >> [ 0.000000] Xen: [mem 0x00000000fed1c000-0x00000000fed3ffff] reserved >> [ 0.000000] Xen: [mem 0x00000000fee00000-0x00000000fee00fff] reserved >> [ 0.000000] Xen: [mem 0x00000000ff000000-0x00000000ffffffff] reserved >> [ 0.000000] Xen: [mem 0x0000000100000000-0x000000023fdfffff] usable >> [ 0.000000] bootconsole [xenboot0] enabled >> [ 0.000000] NX (Execute Disable) protection: active >> [ 0.000000] SMBIOS 2.7 present. >> [ 0.000000] DMI: MSI MS-7680/H61M-P23 (MS-7680), BIOS V17.0 03/14/2011 >> [ 0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved >> [ 0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable >> [ 0.000000] No AGP bridge found >> [ 0.000000] e820: last_pfn = 0x23fe00 max_arch_pfn = 0x400000000 >> [ 0.000000] e820: lacanning 1 areas for low memory corruption >> [ 0.000000] Base memory trampoline at [ffff880000098000] 98000 size 24576 >> [ 0.000000] reserving inaccessible SNB gfx pages >> [ 0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff] >> [ 0.000000] [mem 0x00000000-0x000fffff] page 4k >> [ 0.000000] init_memory_mapping: [mem 0x1f2000000-0x1f20c3fff] >> [ 0.000000] [mem 0x1f2000000-0x1f20c3fff] page 4k >> [ 0.000000] BRK [0x01cd2000, 0x01cd2fff] PGTABLE >> [ 0.000000] BRK [0x01cd3000, 0x01cd3fff] PGTABLE >> [ 0.000000] init_memory_mapping: [mem 0x1f0000000-0x1f1ffffff] >> [ 0.000000] [mem 0x1f0000000-0x1f1ffffff] page 4k >> [ 0.000000] BRK [0x01cd4000, 0x01cd4fff] PGTABLE >> [ 0.000000] BRK [0x01cd5000, 0x01cd5fff] PGTABLE >> [ 0.000000] BRK [0x01cd6000, 0x01cd6fff] PGTABLE >> [ 0.000000] init_memory_mapping: [mem 0x180000000-0x1efffffff] >> [ 0.000000] [mem 0x180000000-0x1efffffff] page 4k >> [ 0.000000] init_memory_mapping: [mem 0x00100000-0x1fffffff] >> [ 0.000000] [mem 0x00100000-0x1fffffff] page 4k >> [ 0.000000] init_memory_mapping: [mem 0x20200000-0x3fffffff] >> [ 0.000000] [mem 0x20200000-0x3fffffff] page 4k >> [ 0.000000] init_memory_mapping: [mem 0x40200000-0xbad7ffff] >> [ 0.000000] [mem 0x40200000-0xbad7ffff] page 4k >> [ 0.000000] init_memory_mapping: [mem 0xbadf4000-0xbadf5fff] >> [ 0.000000] [mem 0xbadf4000-0xbadf5fff] page 4k >> [ 0.000000] init_memory_mapping: [mem 0xbae7f000-0xbaffffff] >> [ 0.000000] [mem 0xbae7f000-0xbaffffff] page 4k >> [ 0.000000] init_memory_mapping: [mem 0x100000000-0x17fffffff] >> [ 0.000000] [mem 0x100000000-0x17fffffff] page 4k >> [ 0.000000] init_memory_mapping: [mem 0x1f20c4000-0x23fdfffff] >> [ 0.000000] [mem 0x1f20c4000-0x23fdfffff] page 4k > so init_memory_mapping are all done. > >> (XEN) d0:v0: unhandled page fault (ec=0000) >> (XEN) Pagetable walk from ffffea000005b2d0: >> (XEN) L4[0x1d4] = 0000000000000000 ffffffffffffffff >> (XEN) domain_crash_sync called from entry.S >> (XEN) Domain 0 (vcpu#0) crashed on cpu#0: >> (XEN) ----[ Xen-4.1.5-pre x86_64 debug=y Tainted: C ]---- >> (XEN) CPU: 0 >> (XEN) RIP: e033:[<ffffffff8103feba>] >> (XEN) RFLAGS: 0000000000000206 EM: 1 CONTEXT: pv guest >> (XEN) rax: ffffea0000000000 rbx: 0000000001a0c000 rcx: 0000000080000000 >> (XEN) rdx: 000000000005b2a0 rsi: 0000000001a0c000 rdi: 0000000000000000 >> (XEN) rbp: ffffffff81a01dd8 rsp: ffffffff81a01d90 r8: 0000000000000000 >> (XEN) r9: 0000000010000001 r10: 0000000000000005 r11: 0000000000100000 >> (XEN) r12: 0000000000000000 r13: 0000020000000000 r14: 0000000000000000 >> (XEN) r15: 0000000000100000 cr0: 000000008005003b cr4: 00000000000026f0 >> (XEN) cr3: 0000000221a0c000 cr2: ffffea000005b2d0 >> (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: e02b cs: e033 >> (XEN) Guest stack trace from rsp=ffffffff81a01d90: >> (XEN) 0000000080000000 0000000000100000 0000000000000000 ffffffff8103feba >> (XEN) 000000010000e030 0000000000010006 ffffffff81a01dd8 000000000000e02b >> (XEN) 0000000000000000 ffffffff81a01e08 ffffffff81042d27 000000023fe00000 >> (XEN) 00000001f20c4000 0000020000000000 00000001acac7000 ffffffff81a01e48 >> (XEN) ffffffff81ad2d21 0000000000000000 0000000000000028 0000000040004000 >> (XEN) 0000000000000000 0000000000000000 0000000000000000 ffffffff81a01ed8 >> (XEN) ffffffff81ac293f ffffffff81b46900 0000000000000000 0000000000000000 >> (XEN) 0000000000000000 ffffffff81a01f00 ffffffff8165fbd1 ffffffff00000010 >> (XEN) ffffffff81a01ee8 ffffffff81a01ea8 0000000000000000 ffffffff81a01ec8 >> (XEN) ffffffffffffffff ffffffff81b46900 0000000000000000 0000000000000000 >> (XEN) 0000000000000000 ffffffff81a01f28 ffffffff81abcd62 ffffffff96062000 >> (XEN) ffffffff81cc6000 ffffffff81ccd000 ffffffff81b4f2e0 0000000000000000 >> (XEN) 0000000000000000 0000000000000000 0000000000000000 ffffffff81a01f38 >> (XEN) ffffffff81abc5f7 ffffffff81a01ff8 ffffffff81abf0c7 0300000100000032 >> (XEN) 0000000000000005 0000000000000000 0000000000000000 0000000000000000 >> (XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> (XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> (XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> (XEN) 0000000000000000 819822831fc9cbf5 000206a700100800 0000000000000001 >> (XEN) 0000000000000000 0000000000000000 0f00000060c0c748 ccccccccccccc305 >> (XEN) Domain 0 crashed: rebooting machine in 5 seconds. >> (XEN) Resetting with ACPI MEMORY or I/O RESET_REG. > can we get kernel trace instead? (XEN) d0:v0: unhandled page fault (ec=0000) (XEN) Pagetable walk from ffffea000005b2d0: (XEN) L4[0x1d4] = 0000000000000000 ffffffffffffffff (XEN) domain_crash_sync called from entry.S This means that Xen was unable to context switch back to dom0 The value in rax looks suspiciously related to the faulting address in cr2. Konrad: is the instruction at ffffffff8103feba possibly a rax-relative dereference? ~Andrew > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxx > http://lists.xen.org/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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