Re: [Xen-devel] context switch

Kier,
What are your thoughts on having a mechanism to manage hypervisor
preemption from guest kernels?

Regards,

K. Y

>>> On Tue, Mar 28, 2006 at  3:56 pm, in message
<8faa95f64ad61af657bdda6b115b5fd4@xxxxxxxxxxxx>, Keir Fraser
<Keir.Fraser@xxxxxxxxxxxx> wrote: 

> On 28 Mar 2006, at 20:35, Keir Fraser wrote:
> 
>> We should probably just rely on the failsafe_handler actually 
>> (assuming it now works :- ) ).
>>
>> That 'slow path' will be taken so infrequently it's not worth having
a 
>> special prepare_arch_switch() for Xen. It's really a hangover from
the 
>> initial port from i386.
> 
> Actually, we do still need to be sure to save the segment values
before 
> switching TLS/LDT, so I guess we do need most of prepare_arch_switch

> even on x86/64.
> 
> We can't do the work in switch_mm() since lazy tlb logic may cause it

> to not be executed. And switch_to() is too late.
> 
>   --  Keir


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread]

Current Thread

[Next in Thread>

Previous by Date:

Re: [Xen-devel] context switch, Ky Srinivasan

Next by Date:

RE: [Xen-devel] [PATCH] enable modifying of registers from gdb, Kamble, Nitin A

Previous by Thread:

Re: [Xen-devel] context switch, Keir Fraser

Next by Thread:

Re: [Xen-devel] context switch, Keir Fraser

Indexes:

[Date] [Thread] [Top] [All Lists]