Re: [Xen-devel] Unable to handle kernel paging request at virtual address e9042464

[Andrew Theurer <habanero@xxxxxxxxxx>]

On Monday 25 April 2005 16:54, Keir Fraser wrote:
> On 25 Apr 2005, at 21:03, Jacob Gorm Hansen wrote:
> > Do you know how the interface has changed, i.e. what I need to
> > modify in vmtools (xend is not an option since I am running with my
> > own userspace relinked above 0xf0000000 in dom0) to get this
> > working again?
>
> I don't think this was the problem actually, but anyway: createdomain
> no longer takes memsize nor initial mem size. To pin to a cpu you now
> use DOM0_PINCPU. To set max mem reservation you use DOM0_SETMAXMEM.
> To actually reserve memory you use
> do_dom_mem_op(MEMOP_increase_reservation).

FWIW, I think I am hitting an BUG on that very changeset (1.1367) by 
trying to start a smp domU.  I have narrowed it down the 1.1367, and I 
am going to remove that diff from very latest bk pull an see what 
happens.

-Andrew


BUG output:

Starting domain dom1
------------[ cut here ]------------

kernel BUG at <bad filename>:46733!
invalid operand: 0000 [#1]
PREEMPT
Modules linked in: ipt_MASQUERADE iptable_nat ip_conntrack ip_tables 
qla2300 qla2xxx scsi_transport_fc mptscsih mptbase
CPU:    0
EIP:    0061:[<c014c6e8>]    Not tainted VLI
EFLAGS: 00010286   (2.6.11-xen0-up)
EIP is at page_remove_rmap+0x3d/0x47
eax: ffffffff   ebx: 00000000   ecx: c04f771c   edx: c16fdfe0
esi: f48d5494   edi: 0feff067   ebp: 00001000   esp: f459de48
ds: 007b   es: 007b   ss: 0069
Process python (pid: 4300, threadinfo=f459c000 task=f76c3a80)
Stack: c1641640 f459c000 c0145244 c16fdfe0 0a3d5067 c01471fe 00000010 
c16fdfe0
       00000000 b7525000 c04f771c b7925000 f455fb78 b7526000 00000000 
c0145408
       c04f771c f455fb74 b7525000 00001000 00000000 b7525000 f455fb78 
b7526000
Call Trace:
 [<c0145244>] zap_pte_range+0x186/0x2f3
 [<c01471fe>] do_anonymous_page+0x169/0x210
 [<c0145408>] zap_pmd_range+0x57/0x75
 [<c0145460>] zap_pud_range+0x3a/0x5e
 [<c01454f8>] unmap_page_range+0x74/0x8b
 [<c014560c>] unmap_vmas+0xfd/0x223
 [<c0149ff4>] unmap_region+0x7b/0xe9
 [<c014a2c8>] do_munmap+0x122/0x191
 [<c014a37e>] sys_munmap+0x47/0x62
 [<c010965c>] syscall_call+0x7/0xb
Code: 0f 98 c0 84 c0 74 1c 8b 42 08 83 c0 01 78 1c c7 44 24 04 ff ff ff 
ff c7 04 24 10 00 00 00 e8 a3 ef fe ff 83 c4 08 c3 0f 0b eb d1 <0f> 0b 
8d b6 00 00 00 00 eb da 55 57 56 53 83 ec 1c 8b 4c 24 34
 <6>note: python[4300] exited with preempt_count 1
scheduling while atomic: python/0x00000001/4300
 [<c03ae564>] schedule+0x534/0x5d8
 [<c010980b>] hypervisor_callback+0x37/0x40
 [<c03af64d>] rwsem_down_read_failed+0x8d/0x18b
 [<c011da4b>] .text.lock.exit+0x27/0x8c
 [<c010a33f>] do_invalid_op+0x0/0xab
 [<c011c212>] do_exit+0x9d/0x36b
 [<c010a33f>] do_invalid_op+0x0/0xab
 [<c010a02d>] do_trap+0x0/0xd5
 [<c010a3e1>] do_invalid_op+0xa2/0xab
 [<c014c6e8>] page_remove_rmap+0x3d/0x47
 [<c013aa7e>] rmqueue_bulk+0x4a/0xd5
 [<c013a94a>] prep_new_page+0x72/0x77
 [<c013adfe>] buffered_rmqueue+0x153/0x2ba
 [<c01097cc>] error_code+0x38/0x40
 [<c014c6e8>] page_remove_rmap+0x3d/0x47
 [<c0145244>] zap_pte_range+0x186/0x2f3
 [<c01471fe>] do_anonymous_page+0x169/0x210
 [<c0145408>] zap_pmd_range+0x57/0x75
 [<c0145460>] zap_pud_range+0x3a/0x5e
 [<c01454f8>] unmap_page_range+0x74/0x8b
 [<c014560c>] unmap_vmas+0xfd/0x223
 [<c0149ff4>] unmap_region+0x7b/0xe9
 [<c014a2c8>] do_munmap+0x122/0x191
 [<c014a37e>] sys_munmap+0x47/0x62
 [<c010965c>] syscall_call+0x7/0xb


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