On Tue, Jan 24, 2006 at 12:30:42AM -0600, Brent Casavant wrote: > On Mon, 23 Jan 2006, Grant Grundler wrote: > > Would an app first need to mmap an uncached address? > > Or some other obvious "marker" that might warn the kernel? > > I'm not sure an uncached address would be appropriate, as I > believe there are other non-IO uncached mappings which can > be performed (whatever the fetchop stuff morphed into, for > example -- I can't remember what its called now). OK - just not many user space programs map uncache IO space. > The only obvious marker I can thing of would be a flag in the > mm struct set by a device driver when such a mapping occurs. Device driver? Your original email only talks about user space: http://marc.theaimsgroup.com/?l=linux-ia64&m=113771591308925&w=2 Something that has to go through syscall/mmap and eventually into IA64 specific code to setup a virtual address. Or did I miss some later bit about a kernel driver? > I can't think of any obviously correct state/flag to inspect, > short of the other suggestion I made tonight. ok. nevermind then... grant - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.htmlReceived on Tue Jan 24 18:04:49 2006
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