RE: [Xen-devel] [Question] Has anyone tried kexec/kdump

["Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>]

I forgot in which step in my experiment that the BUG happens, so not sure if it  is related to the UP/SMP kexec kernel.

But yes, I didn't notice this UP requirement, will try it in future. Thanks for remind. (BTW, this is only for the kexec kernel so it should be acceptable).

 

Thanks

--jyh

 

 

From: Bruce Edge [mailto:bruce.edge@xxxxxxxxx]
Sent: Wednesday, September 08, 2010 6:38 AM
To: Jiang, Yunhong
Cc: xen-devel
Subject: Re: [Xen-devel] [Question] Has anyone tried kexec/kdump

 

 

On Wed, Apr 28, 2010 at 2:07 AM, Jiang, Yunhong <yunhong.jiang@xxxxxxxxx> wrote:

I tried kexec on xen environment and get followed error. Does anyone meet similar issues? Does anyone try kexec/kdump recendly?

 

Did you ever get this working?

 

I noticed that the kdump docs state that you have to have CONFIG_SMP=n (Documentation/kdump/kdump.txt), this seems like a huge limitation in this era of multicore machines.

 

-Bruce

 

Xen Changeset: 21230:c87ec146229a and Dom0 is pvops dom0.

Thanks
--jyh

Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.491275] BUG: unable to handle kernel NULL pointer dereference at (null)
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] IP: [<ffffffff8102c39a>] xen_page_pinned+0x1d/0x3c
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] PGD 11006067 PUD 11078067 PMD 0
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] Oops: 0000 [#1] SMP
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] last sysfs file: /sys/module/libata/version
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] CPU 0
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] Modules linked in: igb sg sr_mod cdrom ata_generic pata_acpi ahci ide_gd_mod ide_core usb_storage ata_piix libata sd_mod scsi_mod ehci_hcd ohci_hcd uhci_hcd
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] Pid: 3591, comm: kexec Not tainted 2.6.31.13 #1 To Be Filled By O.E.M.
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] RIP: e030:[<ffffffff8102c39a>]  [<ffffffff8102c39a>] xen_page_pinned+0x1d/0x3c
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] RSP: e02b:ffff880011011e18  EFLAGS: 00010246
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] RAX: 0000000000000000 RBX: 0000000780000000 RCX: ffff880011011e38
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] RDX: 0000000000000000 RSI: 000000002dbb4063 RDI: 00000000000f0000
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] RBP: ffff880011011e28 R08: 0000000000000003 R09: ffff880011011e38
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] R10: ffff880011011e38 R11: 0000000000000002 R12: ffff880011004000
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] R13: 0000000000000001 R14: 000000002dbb4063 R15: ffff88001104f000
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] FS:  00007f0311e606f0(0000) GS:ffffc90000000000(0000) knlGS:0000000000000000
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] CR2: 0000000000000000 CR3: 00000000110a1000 CR4: 0000000000002660
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] Process kexec (pid: 3591, threadinfo ffff880011010000, task ffff880011893c80)
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] Stack:
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003]  ffff880011004000 ffff880011004000 ffff880011011e58 ffffffff8102d58d
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] <0> ffff880011004000 0000000040000000 ffff880011039000 0000008000000000
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] <0> ffff880011011e68 ffffffff8104ab25 ffff880011011ee8 ffffffff8104b1ea
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] Call Trace:
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003]  [<ffffffff8102d58d>] xen_set_pgd+0x41/0xba
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003]  [<ffffffff8104ab25>] set_pgd+0x17/0x1b
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003]  [<ffffffff8104b1ea>] machine_kexec_prepare+0x56b/0x60b
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003]  [<ffffffff81097110>] sys_kexec_load+0x27d/0x561
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003]  [<ffffffff81525bd0>] ? thread_return+0x7e/0x95
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003]  [<ffffffff810a6a68>] ? audit_syscall_entry+0xfe/0x12a
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003]  [<ffffffff81032c82>] system_call_fastpath+0x16/0x1b
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] Code: 48 89 c7 74 07 31 f6 e8 c5 06 0a 00 c9 c3 55 48 89 e5 53 48 83 ec 08 e8 a9 a4 02 00 48 89 c3 48 c1 eb 0c 48 89 df e8 1a f6 ff ff <48> 8b 38 48 6b c3 38 48 83 e7 fc 48 01 c7 e8 22 f6 ff ff 5a 5b
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] RIP  [<ffffffff8102c39a>] xen_page_pinned+0x1d/0x3c
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003]  RSP <ffff880011011e18>
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] CR2: 0000000000000000
Apr 29 00:57:36 vt_wb_jimmy kernel: [   60.492003] ---[ end trace 4c3a1aad9172f2c6 ]---

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