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RE: [Xen-devel] how can native driver response quickly for low FIFO device


  • To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
  • From: "Dong, Eddie" <eddie.dong@xxxxxxxxx>
  • Date: Thu, 25 May 2006 22:21:43 +0800
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Thu, 25 May 2006 07:22:20 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcaABA4kw0cNlSQLQSe8bS4ZDgrJswAAMMpQ
  • Thread-topic: [Xen-devel] how can native driver response quickly for low FIFO device

Keir Fraser wrote:
> On 25 May 2006, at 14:53, Dong, Eddie wrote:
> 
> The bytes are taken from the UART in interrupt context inside Xen.
> Data will only build up inside the UART FIFO if interrupts are
> disabled for long periods.
> 
Oo, understand UART is handled by Xen, Is this because of this reason? 
or for debug/console use, and how about other devices?
If a user has an PCI card with 8 UART in the box, will we have problem?
thx,eddie

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