RE: [Xen-ia64-devel][PATCH 3/3]provide hypercall the same pathwithsyscall

["Xu, Anthony" <anthony.xu@xxxxxxxxx>]

Hi Alex,

Sorry, I ignored multicall,
This patch makes domU boot.

> Also, it would be
> nice to include performance data when submitting patches which improve
> performance. 

I didn't get the performance data, 
This patch definitely shorts the path of hypercall.
Most of scratch registers don't need to be saved/restored.
So this patch should be good for performance

--Anthony



Alex Williamson write on 2007年1月13日 7:16:
> On Fri, 2007-01-12 at 13:20 +0800, Xu, Anthony wrote:
>> Xu, Anthony write on 2007年1月11日 15:12:
>>> provide hypercall the same path with syscall
>>> most of scrach registers don't need to be saved/restored it is good
>>> for performance 
>>> 
>>> --Anthony
> 
> Hi Anthony,
> 
>    There seems to be a problem with these.  With all 4 patches
> applied, 
> I can't boot a domU (4-way, 4G).  My dom0 is configured as a 2-way,
> 16G. 
> Trying to boot the domU results in the panic below.  Also, it would be
> nice to include performance data when submitting patches which improve
> performance.  Thanks,
> 
>       Alex
> 
> TCP bind hash table entries: 65536 (order: 6, 1048576 bytes)
> TCP: Hash tables configured (established 524288 bind 65536)
> TCP reno registered
> TCP bic registered
> NET: Registered protocol family 1
> NET: Registered protocol family 17
> (XEN) *** xen_handle_domain_access: exception table lookup failed,
> iip=0xc005803891c800, addr=0xc005803891c800, spinning... (XEN) $$$$$
> PANIC in domain 0 (k6=0xf000000007c28000): ***
> xen_handle_domain_access: exception table lookup failed,
> iip=0xc005803891c800, addr=0xc005803891c800, spinning... (XEN) d
> 0xf000000007c50080 domid 0 (XEN) vcpu 0xf000000007c28000 vcpu 0 (XEN)
> (XEN) CPU 4 (XEN) psr : 0000101008226018 ifs : 8000000000000006 ip  :
> [<00c005803891c800>] (XEN) ip is at ???
> (XEN) unat: 0000000000000000 pfs : 0000000000000918 rsc :
> 0000000000000003 (XEN) rnat: f000000007c2fdc0 bsps: bfffff0000400088
> pr  : 000000000015a999 (XEN) ldrs: 0000000000000000 ccv :
> 0000000080000003 fpsr: 0009804c0270033f (XEN) csd : 0000000000000000
> ssd : 0000000000000000 (XEN) b0  : f000000004031de0 b6  :
> 00c005803891c808 b7  : f000000004002e20 (XEN) f6  :
> 000000000000000000000 f7  : 000000000000000000000 (XEN) f8  :
> 000000000000000000000 f9  : 000000000000000000000 (XEN) f10 :
> 000000000000000000000 f11 : 000000000000000000000 (XEN) r1  :
> 00cc000760467e31 r2  : f0000100fdc44338 r3  : f0000100fdc44339 (XEN)
> r8  : f000000004029e48 r9  : 0000000000000001 r10 : 0000000000000000
> (XEN) r11 : 0000000000150259 r12 : f000000007c2fe00 r13 :
> f000000007c28000 (XEN) r14 : 00c005803891c808 r15 : f000000004c40018
> r16 : 0000000080000003 (XEN) r17 : f000000004c40050 r18 :
> f000000004c40051 r19 : f0000100fdc44378 (XEN) r20 : f000000004c40090
> r21 : 0000000000000000 r22 : 0000000000000080 (XEN) r23 :
> a000000100c2bb80 r24 : 0000005000000080 r25 : 0000000000000000 (XEN)
> r26 : 0000000000000000 r27 : 000000000000044e r28 : 0000000000000000
> (XEN) r29 : 0000000000000002 r30 : 0000000000000000 r31 :
> 0000000000000695 (XEN) (XEN) Call Trace: (XEN)  [<f0000000040b1490>]
> show_stack+0x80/0xa0 (XEN)                                
> sp=f000000007c2f8b0 bsp=f000000007c294b0 (XEN)  [<f000000004086880>]
> panic_domain+0x120/0x170 (XEN)                                
> sp=f000000007c2fa80 bsp=f000000007c29448 (XEN)  [<f00000000407afe0>]
> ia64_do_page_fault+0x5e0/0x5f0 (XEN)                                
> sp=f000000007c2fbc0 bsp=f000000007c293b0 (XEN)  [<f0000000040aa680>]
> ia64_leave_kernel+0x0/0x300 (XEN)                                
> sp=f000000007c2fc00 bsp=f000000007c293b0 (XEN) domain_crash_sync
> called from xenmisc.c:175 (XEN) Domain 0 (vcpu#0) crashed on cpu#4:
> (XEN) d 0xf000000007c50080 domid 0
> (XEN) vcpu 0xf000000007c28000 vcpu 0
> (XEN)
> (XEN) CPU 4
> (XEN) psr : 0000141208026010 ifs : 0000000000000006 ip  :
> [<a000000100068762>] (XEN) ip is at ???
> (XEN) unat: 0000000000000000 pfs : 800000000000040e rsc :
> 0000000000000008 (XEN) rnat: 0000000000000000 bsps: a000000100c251b0
> pr  : 0000000000155a65 (XEN) ldrs: 0000000001500000 ccv :
> 0000000000000000 fpsr: 0009804c0270433f (XEN) csd : 0000000000000000
> ssd : 0000000000000000 (XEN) b0  : a00000010006e270 b6  :
> a0000001006c4440 b7  : a0000001009dbe60 (XEN) f6  :
> 1003e0000000000000000 f7  : 000000000000000000000 (XEN) f8  :
> 000000000000000000000 f9  : 000000000000000000000 (XEN) f10 :
> 000000000000000000000 f11 : 000000000000000000000 (XEN) r1  :
> a00000010104ec60 r2  : a000000100e755a0 r3  : a000000100e755a0 (XEN)
> r8  : 0000000000000001 r9  : fffffffffff04c18 r10 : 0000000000000000
> (XEN) r11 : a000000100dca648 r12 : a000000100c2bb20 r13 :
> a000000100c24000 (XEN) r14 : 0000000000004000 r15 : 000000000000000d
> r16 : 0000000000000000 (XEN) r17 : a000000100c2bb80 r18 :
> a000000100c2bb88 r19 : a000000100c2bb70 (XEN) r20 : a0000001011242f8
> r21 : a0000001011382f8 r22 : a0000001011242f8 (XEN) r23 :
> a000000100c2bb80 r24 : 0000000000000001 r25 : 0000000000000000 (XEN)
> r26 : 0000000000000000 r27 : a000000100c2bbb0 r28 : 0000000000000000
> (XEN) r29 : 0000000000000001 r30 : 0000000000000000 r31 :
> a0000001011483fc (XEN) (XEN) Call Trace: (XEN)  [<f0000000040b1490>]
> show_stack+0x80/0xa0 (XEN)                                
> sp=f000000007c2f8b0 bsp=f000000007c29500 (XEN)  [<f00000000401f370>]
> __domain_crash+0xf0/0x130 (XEN)                                
> sp=f000000007c2fa80 bsp=f000000007c294d8 (XEN)  [<f00000000401f3f0>]
> __domain_crash_synchronous+0x40/0xf0 (XEN)                           
> sp=f000000007c2fa80 bsp=f000000007c294b0 (XEN)  [<f0000000040868c0>]
> panic_domain+0x160/0x170 (XEN)                                
> sp=f000000007c2fa80 bsp=f000000007c29448 (XEN)  [<f00000000407afe0>]
> ia64_do_page_fault+0x5e0/0x5f0 (XEN)                                
> sp=f000000007c2fbc0 bsp=f000000007c293b0 (XEN)  [<f0000000040aa680>]
> ia64_leave_kernel+0x0/0x300 (XEN)                                
> sp=f000000007c2fc00 bsp=f000000007c293b0 (XEN)
> (XEN) Call Trace:
> (XEN)  [<f0000000040b1490>] show_stack+0x80/0xa0
> (XEN)                                 sp=f000000007c2f8b0
> bsp=f000000007c29500 (XEN)  [<f00000000401f380>]
> __domain_crash+0x100/0x130 (XEN)                                
> sp=f000000007c2fa80 bsp=f000000007c294d8 (XEN)  [<f00000000401f3f0>]
> __domain_crash_synchronous+0x40/0xf0 (XEN)                           
> sp=f000000007c2fa80 bsp=f000000007c294b0 (XEN)  [<f0000000040868c0>]
> panic_domain+0x160/0x170 (XEN)                                
> sp=f000000007c2fa80 bsp=f000000007c29448 (XEN)  [<f00000000407afe0>]
> ia64_do_page_fault+0x5e0/0x5f0 (XEN)                                
> sp=f000000007c2fbc0 bsp=f000000007c293b0 (XEN)  [<f0000000040aa680>]
> ia64_leave_kernel+0x0/0x300 (XEN)                                
> sp=f000000007c2fc00 bsp=f000000007c293b0 (XEN) Domain 0 crashed:
> rebooting machine in 5 seconds.

Attachment: hypercall_fix.patch
Description: hypercall_fix.patch

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