Re: kernel device reset support

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Dong, Eddie wrote:
>> N+1, for me is that synchronous device emulation (like pio and mmio)
>> happens in in the vcpu thread and asynchronous device emulation
>> (handling signals in qemu, performing dma, and injecting interrupts)
>> happens in the device thread.  This minimizes context switching and
>> heavyweight exits.
>>
>>     
> If this is true, then the N+1 thread won't be able to execute
> qemu_system_reset
> which is in VCPU contents, 

I don't understand.  It can certainly access any qemu object (after 
taking qemu_mutex), and it can call any kvm vm ioctl.


> nor can asyn I/O call back APIs.
>   

Do you mean signal handlers?  Sure, but we wait for socket I/O in 
select() and even dequeue signals synchronously.


-- 
error compiling committee.c: too many arguments to function


-------------------------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc.
Still grepping through log files to find problems?  Stop.
Now Search log events and configuration files using AJAX and a browser.
Download your FREE copy of Splunk now >> http://get.splunk.com/