Xen project Mailing List

Re: [Xen-devel] XSAVE/XRSTOR crash resurgence in 4.3

From: Ben Guthro <ben@xxxxxxxxxx>

Date: Mon, 8 Jul 2013 10:31:32 -0400

Cc: Mark Roddy <mark.roddy@xxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxx>

Delivery-date: Mon, 08 Jul 2013 14:31:53 +0000

List-id: Xen developer discussion <xen-devel.lists.xen.org>

On Mon, Jul 8, 2013 at 10:24 AM, Jan Beulich <JBeulich@xxxxxxxx> wrote: >>>> On 08.07.13 at 16:13, Ben Guthro <ben@xxxxxxxxxx> wrote: >> On Fri, Jul 5, 2013 at 8:58 AM, Ben Guthro <ben.guthro@xxxxxxxxx> wrote: >>> On Jul 5, 2013, at 8:15 AM, Jan Beulich <JBeulich@xxxxxxxx> wrote: >>> >>>>>>> On 05.07.13 at 14:10, Ben Guthro <ben.guthro@xxxxxxxxx> wrote: >>>>> Since I am not in the office today, nor near a machine that I can >>>>> access this, I asked someone else to apply and check in this patch, in >>>>> the hope that we could get some useful debug info from the weekend >>>>> test run. >>>>> >>>>> However, when he went to test booting a VM with this patch, the host >>>>> machine rebooted - presumably a Xen crash. >>>> >>>> Oops - it's just printing stuff, so I can't immediately see how that >>>> would happen. But perhaps a trivial oversight of mine... >> >> Here's the crash with this patch >> I'm continuing to look at it, but if something jumps out at you, >> please let me know. > > Quite obvious: hvm_guest_x86_mode() has this assertion. Yet > the original, supposedly working patch had a use of this too iirc. It did...which is worrying. One difference here, is that 4.2 is running in debug=n mode, where 4.3 is debug=y iirc, asserts are disabled on debug=n builds. > > Jan > >> (XEN) Assertion 'v == current' failed at >> /data/home/bguthro/dev/orc-precise/xen/xen/include:275 >> (XEN) ----[ Xen-4.3-unstable x86_64 debug=y Not tainted ]---- >> (XEN) CPU: 1 >> (XEN) RIP: e008:[<ffff82c4c01a4f65>] xsave+0x178/0x2c7 >> (XEN) RFLAGS: 0000000000010006 CONTEXT: hypervisor >> (XEN) rax: ffff830215860000 rbx: ffff83020904ec00 rcx: ffff83021d63a000 >> (XEN) rdx: 00000000bfffffff rsi: 0000000000000003 rdi: ffff83020904ec00 >> (XEN) rbp: ffff830215867d20 rsp: ffff830215867cd0 r8: 0000000000000000 >> (XEN) r9: 0000000000000000 r10: 0000000e23c7b646 r11: 0000000000000000 >> (XEN) r12: ffff8300d0840000 r13: 0000000000000008 r14: ffff830215860000 >> (XEN) r15: ffff830215867f18 cr0: 0000000080050033 cr4: 00000000001426f0 >> (XEN) cr3: 000000020bae2000 cr2: 0000000000000000 >> (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: 0000 cs: e008 >> (XEN) Xen stack trace from rsp=ffff830215867cd0: >> (XEN) ffff830215867df8 ffff830215867d38 ffff82c4c01b4622 ffff830215867d00 >> (XEN) ffff83021d63ad80 0000000000000286 00000000000fa933 ffff8300d0840000 >> (XEN) 0000000000000001 ffff8300d0840000 ffff830215867d60 ffff82c4c0167a1a >> (XEN) ffff830215867d48 ffff830215867dc8 ffff82c4c017019c ffff830215867d98 >> (XEN) 0000000000000282 ffff8300d04fc000 ffff830215867db0 ffff82c4c0160c80 >> (XEN) 0000000a1d63ad18 0000000000000000 80000000d0840510 ffff8300d04fc000 >> (XEN) ffff8300d072b000 0000000000000001 0000000000000001 ffff83021583d080 >> (XEN) ffff830215867e20 ffff82c4c01634bc ffff82c4c01277b9 ffff8300d072b030 >> (XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> (XEN) ffff830215867e20 ffff8300d072b000 ffff8300d04fc000 0000000e21f655a0 >> (XEN) 0000000000000001 ffff83021583d080 ffff830215867eb0 ffff82c4c0124364 >> (XEN) 0000000000000002 ffff83021583d060 0000000100867e60 ffff83021583d068 >> (XEN) ffff82c4c0127824 ffff83021583c028 ffff830215867eb0 ffff8300d04fc000 >> (XEN) 0000000000989680 ffff82c4c01ab600 ffff8300d072b000 ffff82c4c02f0080 >> (XEN) ffff82c4c02f0000 ffff830215860000 ffffffffffffffff ffff83021583d080 >> (XEN) ffff830215867ee0 ffff82c4c012710e ffff830215860000 ffff830215860000 >> (XEN) 00000000ffffff01 0000000000000003 ffff830215867ef0 ffff82c4c0127174 >> (XEN) ffff830215867f10 ffff82c4c0160aba ffff8300d072b000 ffff8300d0840000 >> (XEN) ffff830215867dc8 0000000000000000 0000000000000000 0000000000000000 >> (XEN) 0000000000000000 0000000000000080 00000000000001f7 0000000000000000 >> (XEN) Xen call trace: >> (XEN) [<ffff82c4c01a4f65>] xsave+0x178/0x2c7 >> (XEN) [<ffff82c4c0167a1a>] vcpu_save_fpu+0x83/0x159 >> (XEN) [<ffff82c4c0160c80>] __context_switch+0x16e/0x50b >> (XEN) [<ffff82c4c01634bc>] context_switch+0x1ba/0xf4e >> (XEN) [<ffff82c4c0124364>] schedule+0x60b/0x61a >> (XEN) [<ffff82c4c012710e>] __do_softirq+0x8e/0x99 >> (XEN) [<ffff82c4c0127174>] do_softirq+0x13/0x15 >> (XEN) [<ffff82c4c0160aba>] idle_loop+0x68/0x6a >> (XEN) >> (XEN) >> (XEN) **************************************** >> (XEN) Panic on CPU 1: >> (XEN) Assertion 'v == current' failed at >> /data/home/bguthro/dev/orc-precise/xen/xen/include:275 >> (XEN) **************************************** >> (XEN) >> (XEN) Reboot in five seconds... >> (XEN) Assertion 'current == idle_vcpu[smp_processor_id()]' failed at >> domain.c:1494 >> (XEN) ----[ Xen-4.3-unstable x86_64 debug=y Not tainted ]---- >> (XEN) CPU: 1 >> (XEN) RIP: e008:[<ffff82c4c01642cc>] __sync_local_execstate+0x63/0x86 >> (XEN) RFLAGS: 0000000000010087 CONTEXT: hypervisor >> (XEN) rax: ffff830215860000 rbx: 0000000000000001 rcx: 0000000000000001 >> (XEN) rdx: ffff82c4c026c4a0 rsi: ffff8300d072b000 rdi: ffff830215867a68 >> (XEN) rbp: ffff8302158679b8 rsp: ffff8302158679a8 r8: 0000000000000004 >> (XEN) r9: 000000000000000a r10: 0000000000000020 r11: 000000000000000a >> (XEN) r12: 0000000000000082 r13: 00000000000000fd r14: 0000000000000113 >> (XEN) r15: ffff830215867f18 cr0: 0000000080050033 cr4: 00000000001426f0 >> (XEN) cr3: 000000020bae2000 cr2: 0000000000000000 >> (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: 0000 cs: e008 >> (XEN) Xen stack trace from rsp=ffff8302158679a8: >> (XEN) 00000000000000fd ffff830215867a68 ffff8302158679c8 ffff82c4c01860eb >> (XEN) ffff830215867a58 ffff82c4c017019c ffff82c4c024d581 0000000000000086 >> (XEN) ffff830215867a48 0000000000000086 ffff830215867a18 ffff82c4c012788c >> (XEN) 0000000000000000 8000000015867a28 ffff830215867a28 ffff82c4c01437dc >> (XEN) ffff830215867a58 ffff82c4c0261138 0000000000000082 ffff82c4c02566f0 >> (XEN) 0000000000000113 ffff830215867f18 00007cfdea798577 ffff82c4c0167bef >> (XEN) ffff830215867f18 0000000000000113 ffff82c4c02566f0 0000000000000082 >> (XEN) ffff830215867b58 ffff82c4c0261138 000000000000000a 0000000000000020 >> (XEN) 000000000000000a 0000000000000004 0000000000000000 0000000000000000 >> (XEN) ffff83021583d020 0000000000000082 ffff82c4c0287860 000000fd00000000 >> (XEN) ffff82c4c0185be0 000000000000e008 0000000000000246 ffff830215867b18 >> (XEN) 0000000000000000 ffff82c4c0185bd8 ffff830215867b48 0000138800000061 >> (XEN) ffff83021583d020 ffff82c4c0261138 0000000000000082 ffff82c4c02566f0 >> (XEN) 0000000000000113 ffff830215867f18 ffff830215867bc8 ffff82c4c0143670 >> (XEN) ffff830215867ba8 ffff82c400000020 ffff830215867bd8 ffff830215867b88 >> (XEN) ffff82c4c024cf6a ffff82c4c024cf6a ffff82c4c02566f0 0000000000000113 >> (XEN) 0000000000000004 0000000000000061 ffff830215867c28 ffff82c4c024cf6a >> (XEN) ffff830215867c18 ffff82c4c018dde0 ffff830200000000 0000000000000000 >> (XEN) fbbc000000000000 044fc20b0f000a7f ffff8300d04fc000 ffff8300d0840000 >> (XEN) 0000000000000008 ffff830215860000 00007cfdea7983b7 ffff82c4c023020d >> (XEN) Xen call trace: >> (XEN) [<ffff82c4c01642cc>] __sync_local_execstate+0x63/0x86 >> (XEN) [<ffff82c4c01860eb>] invalidate_interrupt+0x33/0x86 >> (XEN) [<ffff82c4c017019c>] do_IRQ+0x9e/0x68d >> (XEN) [<ffff82c4c0167bef>] common_interrupt+0x5f/0x70 >> (XEN) [<ffff82c4c0185be0>] machine_restart+0x39/0x208 >> (XEN) [<ffff82c4c0143670>] panic+0x120/0x129 >> (XEN) [<ffff82c4c018dde0>] do_invalid_op+0x3d7/0x45b >> (XEN) [<ffff82c4c023020d>] handle_exception_saved+0x2e/0x6c >> (XEN) [<ffff82c4c01a4f65>] xsave+0x178/0x2c7 >> (XEN) [<ffff82c4c0167a1a>] vcpu_save_fpu+0x83/0x159 >> (XEN) [<ffff82c4c0160c80>] __context_switch+0x16e/0x50b >> (XEN) [<ffff82c4c01634bc>] context_switch+0x1ba/0xf4e >> (XEN) [<ffff82c4c0124364>] schedule+0x60b/0x61a >> (XEN) [<ffff82c4c012710e>] __do_softirq+0x8e/0x99 >> (XEN) [<ffff82c4c0127174>] do_softirq+0x13/0x15 >> (XEN) [<ffff82c4c0160aba>] idle_loop+0x68/0x6a >> (XEN) >> (XEN) >> (XEN) **************************************** >> (XEN) Panic on CPU 1: >> (XEN) Assertion 'current == idle_vcpu[smp_processor_id()]' failed at >> domain.c:1494 >> (XEN) **************************************** >> (XEN) >> (XEN) Reboot in five seconds... >> (XEN) Resetting with ACPI MEMORY or I/O RESET_REG. >> >> >> Ben >> >> _______________________________________________ >> 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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