Re: [Xen-devel] [PATCH] SCHEDOP_block_masked

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 10 Mar 2006, at 11:43, John Levon wrote:

> It uses event_pending() which will be zero:
>
>      76 #define event_pending(v)                        \
>      77     (!!(v)->vcpu_info->evtchn_upcall_pending &  \
>      78       !(v)->vcpu_info->evtchn_upcall_mask)
>
> But, now you mention it, I wonder if this wouldn't be better taking an
> event channel to check on before sleeping (though we'd still wake on
> any). This would avoid the small race (which doesn't really matter in
> the context we've been using this).
Can you give more details about the usage scenario? What ultimately 
allows the VCPU to continue running (presumably by clearing its 
evtchn_upcall_mask)?
 -- Keir


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