Laurent Vivier wrote:
> This patch is the kernel part of the "batch writes to MMIO" patch.
>
> When kernel has to send MMIO writes to userspace, it stores them
> in memory until it has to pass the hand to userspace for another
> reason. This avoids to have too many context switches on operations
>
Laurent Vivier wrote:
>>>
>>>
>> This breaks ordering on smp guests. batch_data needs to be a kvm thing,
>> not a vcpu thing, and locked, of course.
>>
>
> - is ordering between vcpu important when we already delay operations ?
>
Yes. Ordering is very different from delaying.
Le mercredi 23 avril 2008 à 17:31 +0300, Avi Kivity a écrit :
> Laurent Vivier wrote:
> > This patch is the kernel part of the "batch writes to MMIO" patch.
> >
> > When kernel has to send MMIO writes to userspace, it stores them
> > in memory until it has to pass the hand to userspace for another
Laurent Vivier wrote:
> This patch is the kernel part of the "batch writes to MMIO" patch.
>
> When kernel has to send MMIO writes to userspace, it stores them
> in memory until it has to pass the hand to userspace for another
> reason. This avoids to have too many context switches on operations
>
This patch is the kernel part of the "batch writes to MMIO" patch.
When kernel has to send MMIO writes to userspace, it stores them
in memory until it has to pass the hand to userspace for another
reason. This avoids to have too many context switches on operations
that can wait.
WARNING: this bre
