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xen-devel
Re: [Xen-devel] pvops dom0 work roadmap
Konrad Rzeszutek Wilk writes:
> I will retry this, but in the meantime I am tracking balloon accessing
> non-existent pages:
Hm, what tree of dom0 kernel are you using? Is commit
7394b25905929a92e51771b832ee67b70ccebcf0 (Revert "Xen: Allow guest to
boot ballooned.") there?
The point is that xen_memory_setup should truncate the ram visible in
the e820 map to xen_start_info->nr_pages, so that the balloon driver
would never try to add pages on boot.
Thanks,
Gianluca
>
> <BEGIN>
> [ 0.239963] xen_balloon: Initialising balloon driver.
> [ 0.240057] xen_ballon: 131072 -> 1245184 <-- added a printk.
> [ 0.257938] BUG: unable to handle kernel [ 0.257938] BUG: unable to
> handle kernel paging requestpaging request at ffffea0002d80028
> at ffffea0002d80028
> [ 0.257960] IP:[ 0.257960] IP: [<ffffffff81215f7b>]
> balloon_append+0x13/0x36
> [<ffffffff81215f7b>] balloon_append+0x13/0x36
> [ 0.257960] PGD 10402067 [ 0.257960] PGD 10402067 PUD 10403067 PUD
> 10403067 PMD 1301a067 PMD 1301a067 PTE 0PTE 0
>
> [ 0.257960] Oops: 0002 [#1] [ 0.257960] Oops: 0002 [#1] SMP SMP
>
> [ 0.257960] last sysfs file:
> [ 0.257960] last sysfs file:
> [ 0.257960] CPU 0 [ 0.257960] CPU 0
>
> [ 0.257960] Modules linked in:[ 0.257960] Modules linked in:
>
> [ 0.257960] Pid: 1, comm: swapper Not tainted
> 2.6.31-rc5-xen0-23866-g8584ce8-dirty #6 .
> [ 0.257960] Pid: 1, comm: swapper Not tainted
> 2.6.31-rc5-xen0-23866-g8584ce8-dirty #6 .
> [ 0.257960] RIP: e030:[<ffffffff81215f7b>] [ 0.257960] RIP:
> e030:[<ffffffff81215f7b>] [<ffffffff81215f7b>] balloon_append+0x13/0x36
> [<ffffffff81215f7b>] balloon_append+0x13/0x36
> [ 0.257960] RSP: e02b:ffff88001fc81e70 EFLAGS: 00010282
> [ 0.257960] RSP: e02b:ffff88001fc81e70 EFLAGS: 00010282
> [ 0.257960] RAX: ffffea0002d80028 RBX: 00000000000d0001 RCX:
> 0000000000000064
> [ 0.257960] RAX: ffffea0002d80028 RBX: 00000000000d0001 RCX:
> 0000000000000064
> [ 0.257960] RDX: ffffea0002d7fff0 RSI: ffffffff810000df RDI:
> ffffea0002d80000
> [ 0.257960] RDX: ffffea0002d7fff0 RSI: ffffffff810000df RDI:
> ffffea0002d80000
> [ 0.257960] RBP: ffff88001fc81e70 R08: 0000000000000000 R09:
> ffff88001fc38000
> [ 0.257960] RBP: ffff88001fc81e70 R08: 0000000000000000 R09:
> ffff88001fc38000
> [ 0.257960] R10: ffff88001fc81c20 R11: ffff88001fc81da0 R12:
> ffffea0002d80038
> [ 0.257960] R10: ffff88001fc81c20 R11: ffff88001fc81da0 R12:
> ffffea0002d80038
> [ 0.257960] R13: ffffffff816e1907 R14: 0000000000000000 R15:
> 0000000000000000
> [ 0.257960] R13: ffffffff816e1907 R14: 0000000000000000 R15:
> 0000000000000000
> [ 0.257960] FS: 0000000000000000(0000) GS:ffffc90000000000(0000)
> knlGS:0000000000000000
> [ 0.257960] FS: 0000000000000000(0000) GS:ffffc90000000000(0000)
> knlGS:0000000000000000
> [ 0.257960] CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b
> [ 0.257960] CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b
> [ 0.257960] CR2: ffffea0002d80028 CR3: 0000000001001000 CR4:
> 0000000000002660
> [ 0.257960] CR2: ffffea0002d80028 CR3: 0000000001001000 CR4:
> 0000000000002660
> [ 0.257960] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [ 0.257960] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [ 0.257960] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> 0000000000000400
> [ 0.257960] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> 0000000000000400
> [ 0.257960] Process swapper (pid: 1, threadinfo ffff88001fc80000, task
> ffff88001fc78000)
> [ 0.257960] Process swapper (pid: 1, threadinfo ffff88001fc80000, task
> ffff88001fc78000)
> [ 0.257960] Stack:
> [ 0.257960] Stack:
> [ 0.257960] ffff88001fc81ea0[ 0.257960] ffff88001fc81ea0
> ffffffff816e1ad0 ffffffff816e1ad0 ffff88001fc81ea0 ffff88001fc81ea0
> ffffffff816e18ad ffffffff816e18ad
>
> [ 0.257960] <0>[ 0.257960] <0> ffffffff817167a8 ffffffff817167a8
> 0000000000000040 0000000000000040 ffff88001fc81f10 ffff88001fc81f10
> ffffffff8100a05c ffffffff8100a05c
>
> [ 0.257960] <0>[ 0.257960] <0> ffff88001fc81e00 ffff88001fc81e00
> ffffffff8108e691 ffffffff8108e691 0000000000003333 0000000000003333
> ffffffff81110000 ffffffff81110000
>
> [ 0.257960] Call Trace:
> [ 0.257960] Call Trace:
> [ 0.257960] [<ffffffff816e1ad0>] balloon_init+0x1c9/0x1fd
> [ 0.257960] [<ffffffff816e1ad0>] balloon_init+0x1c9/0x1fd
> [ 0.257960] [<ffffffff816e18ad>] ? xenbus_probe_frontend_init+0x53/0x59
> [ 0.257960] [<ffffffff816e18ad>] ? xenbus_probe_frontend_init+0x53/0x59
> [ 0.257960] [<ffffffff8100a05c>] do_one_initcall+0x56/0x136
> [ 0.257960] [<ffffffff8100a05c>] do_one_initcall+0x56/0x136
> [ 0.257960] [<ffffffff8108e691>] ? register_irq_proc+0xae/0xca
> [ 0.257960] [<ffffffff8108e691>] ? register_irq_proc+0xae/0xca
> [ 0.257960] [<ffffffff81110000>] ? elf_core_dump+0x81e/0xc29
> [ 0.257960] [<ffffffff81110000>] ? elf_core_dump+0x81e/0xc29
> [ 0.257960] [<ffffffff816bc9aa>] kernel_init+0x15e/0x1b6
> [ 0.257960] [<ffffffff816bc9aa>] kernel_init+0x15e/0x1b6
> [ 0.257960] [<ffffffff81012cea>] child_rip+0xa/0x20
> [ 0.257960] [<ffffffff81012cea>] child_rip+0xa/0x20
> [ 0.257960] [<ffffffff81011ea7>] ? int_ret_from_sys_call+0x7/0x1b
> [ 0.257960] [<ffffffff81011ea7>] ? int_ret_from_sys_call+0x7/0x1b
> [ 0.257960] [<ffffffff8101265d>] ? retint_restore_args+0x5/0x6
> [ 0.257960] [<ffffffff8101265d>] ? retint_restore_args+0x5/0x6
> [ 0.257960] [<ffffffff81012ce0>] ? child_rip+0x0/0x20
> [ 0.257960] [<ffffffff81012ce0>] ? child_rip+0x0/0x20
> [ 0.257960] Code: [ 0.257960] Code: 55 55 89 89 ff ff 48 48 89 89 e5
> e5 e8 e8 25 25 32 32 df df ff ff c9 c9 c3 c3 55 55 48 48 89 89 e5 e5 e8 e8
> 5a 5a 32 32 df df ff ff c9 c9 c3 c3 48 48 8b 8b 15 15 d1 d1 0c 0c 43 43 00
> 00 48 48 8d 8d 47 47 28 28 55 55 48 48 89 89 e5 e5 48 48 89 89 42 42 08 08
> <48> <48> 89 89 57 57 28 28 48 48 c7 c7 40 40 08 08 40 40 6c 6c 64 64 81 81
> 48 48 ff ff 05 05 6a 6a ac ac 60 60 00 00 48 48 ff ff
>
> [ 0.257960] RIP [ 0.257960] RIP [<ffffffff81215f7b>]
> balloon_append+0x13/0x36
> [<ffffffff81215f7b>] balloon_append+0x13/0x36
> [ 0.257960] RSP <ffff88001fc81e70>
> [ 0.257960] RSP <ffff88001fc81e70>
> [ 0.257960] CR2: ffffea0002d80028
> [ 0.257960] CR2: ffffea0002d80028
> [ 0.257960] ---[ end trace 4eaa2a86a8e2da22 ]---
> [ 0.257960] ---[ end trace 4eaa2a86a8e2da22 ]---
> <END>
>
> Sorry for the duplicate lines. I think the combination of earlycons and
> console both pointing
> to the Xen console driver is screwing this up.
>
> This could be a simple bug with the max_pfn being reset to phantom value:
>
> [ 0.000000] BIOS-provided physical RAM map:
> [ 0.000000] Xen: 0000000000000000 - 000000000009f400 (usable)
> [ 0.000000] Xen: 000000000009f400 - 0000000000100000 (reserved)
> [ 0.000000] Xen: 0000000000100000 - 00000000cfee0000 (usable)
> [ 0.000000] Xen: 00000000cfee0000 - 00000000cfee3000 (ACPI NVS)
> [ 0.000000] Xen: 00000000cfee3000 - 00000000cfef0000 (ACPI data)
> [ 0.000000] Xen: 00000000cfef0000 - 00000000cff00000 (reserved)
> [ 0.000000] Xen: 00000000e0000000 - 00000000f0000000 (reserved)
> [ 0.000000] Xen: 00000000fec00000 - 0000000100000000 (reserved)
> [ 0.000000] Xen: 0000000100000000 - 0000000130000000 (usable)
> [ 0.000000] console [xenboot0] enabled
> [ 0.000000] DMI 2.5 present.
> [ 0.000000] Phoenix BIOS detected: BIOS may corrupt low RAM, working
> around it.
> [ 0.000000] e820 update range: 0000000000000000 - 0000000000010000
> (usable) ==> (reserved)
> [ 0.000000] last_pfn = 0x130000 max_arch_pfn = 0x400000000
> [ 0.000000] max_pfn = 1245184 <-- Added a printk
> [ 0.000000] num_physpages: 1245184 <-- Added a printk
> [ 0.000000] Searching for max PFN under 4GB <-- Added a printk
> [ 0.000000] last_pfn = 0xcfee0 max_arch_pfn = 0x400000000
> [ 0.000000] max_low_pfn: 851680m <-- Added a printk
> [ 0.000000] Scanning 0 areas for low memory corruption
> [ 0.000000] modified physical RAM map:
> [ 0.000000] modified: 0000000000000000 - 0000000000010000 (reserved)
> [ 0.000000] modified: 0000000000010000 - 000000000009f400 (usable)
> [ 0.000000] modified: 000000000009f400 - 0000000000100000 (reserved)
> [ 0.000000] modified: 0000000000100000 - 00000000cfee0000 (usable)
> [ 0.000000] modified: 00000000cfee0000 - 00000000cfee3000 (ACPI NVS)
> [ 0.000000] modified: 00000000cfee3000 - 00000000cfef0000 (ACPI data)
> [ 0.000000] modified: 00000000cfef0000 - 00000000cff00000 (reserved)
> [ 0.000000] modified: 00000000e0000000 - 00000000f0000000 (reserved)
> [ 0.000000] modified: 00000000fec00000 - 0000000100000000 (reserved)
> [ 0.000000] modified: 0000000100000000 - 0000000130000000 (usable)
> [ 0.000000] initial memory mapped : 0 - 20000000
>
> The machine has 4GB, but somehow the max_pfn is set to point to 5.1GB which
> is
> surely not right. Oh, I am compiling a 64-bit Linux and Xen.
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
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- Re: [Xen-devel] pvops dom0 work roadmap, (continued)
- Re: [Xen-devel] pvops dom0 work roadmap, Jan Beulich
- Re: [Xen-devel] pvops dom0 work roadmap, Jeremy Fitzhardinge
- Re: [Xen-devel] pvops dom0 work roadmap, Jan Beulich
- Re: [Xen-devel] pvops dom0 work roadmap, Jeremy Fitzhardinge
- Re: [Xen-devel] pvops dom0 work roadmap, Konrad Rzeszutek Wilk
- Re: [Xen-devel] pvops dom0 work roadmap, Jeremy Fitzhardinge
- Re: [Xen-devel] pvops dom0 work roadmap, Konrad Rzeszutek Wilk
- Re: [Xen-devel] pvops dom0 work roadmap,
Gianluca Guida <=
- Re: [Xen-devel] pvops dom0 work roadmap, Konrad Rzeszutek Wilk
- Re: [Xen-devel] pvops dom0 work roadmap, Gianluca Guida
- Re: [Xen-devel] pvops dom0 work roadmap, Konrad Rzeszutek Wilk
Re: [Xen-devel] pvops dom0 work roadmap, M A Young
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