On Sun, Jul 30, 2006 at 12:57:32PM +0200, Divacky Roman wrote: > hi, > > while working on SoC linuxolator project I am in a need of this: > > I need to do some operation on memory like mem1 = mem1 + mem2 etc. > where the mem1/mem2 access can trigger fault. (memory not mapped or something)
to make it clear.. I am trying to access user-space memory from kernel. This needs to be atomic (its an implementation of linux futexes) I need to check from kernel if some memory is accessible and then perform an operation on this memory. All atomically. hence I need two things - function which checks wheter the memory is accessible and something which makes it atomic (some mutex/something which prevents other process to enter VM to unmap/etc. the memory in question) hope its a bit more clear now roman _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
