On Wed, Mar 21, 2007 at 10:11:48PM +0800, Krishnappa Abhijith-A21204 wrote:
> Also from your below response it means that: UML just have a
> task_structure maintained....
> Also I never saw the UML specific schedule() code in .../arch/um does
> UML uses the host schedule itself ?
UML, like any other port, uses the schedule() in kernel/sched.c. The
UML-specific context switching indirectly uses the host's scheduler
when it switches from one host process to another. TT mode has the
outgoing process sleeping in a read() on a pipe after waking up the
incoming process from its read by writing a byte down its pipe.
But the host makes no scheduling decisions between UML processes - the
UML scheduler makes the decisions and the host scheduler just decides
when the process chosen by the UML scheduler actually gets some CPU
time.
Jeff
--
Work email - jdike at linux dot intel dot com
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