Messages in this thread | ![/](/images/icornerl.gif) | | Date | Wed, 07 Jul 2004 14:45:47 +0200 | From | Helge Hafting <> | Subject | Re: MSI to memory? |
| |
Davide Rossetti wrote:
> Rajesh Shah wrote: > >> What type of usage model did you have in mind to have the >> >> device write to memory instead of using MSI for interrupts? >> >> > for instance for a fast wake-up trick. the driver loops on a memory > location until the MSI write access changes the memory content...
Won't that put a bad load on the bus? Someone else might need it: * Another cpu in a smp system * Any device doing bus-master transfers, even in a UP system
That polling loop had better be guaranteed to be _very_ short.
Helge Hafting - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| ![\](/images/icornerr.gif) |