WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] Interrupt forwarding


On 12 Mar 2005, at 18:11, Ian Pratt wrote:

Shared interrupts aren't good news for performance, but they work OK.

If a driver domain locks up we can kill and restart it -- for safety we
don't rely on it to ack the interrupt.

Shared interrupts are slightly worse because the irq won't get unmasked until all receivers say their work is done. If one lock sup it starves the rest -- until this is detected and that domain gets blown away.

Fortunately the days of shared interrupts are numbered with MSI and PCI-Express.

 -- Keir



-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now.
http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/xen-devel