Messages in this thread | | | Date | Tue, 30 Mar 1999 22:36:04 +1000 | From | Richard Gooch <> | Subject | Re: Address spaces on a i386 - Getting Confused |
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David Miller writes: > Date: Tue, 30 Mar 1999 22:26:34 +1000 > From: Richard Gooch <rgooch@atnf.csiro.au> > > He should be able to allocate kernel pages and mmap() them to user > space. Then he can DMA into the pages and wake up the user process > when it's done. > > This would work, but only if it is mlock'd (could be done by the > kernel, just set the appropriate vm_flags during the mmap) else the > swapper can toss it to disk at any time.
??? Pages returned by kmalloc() or get_free_page() aren't swappable.
Regards,
Richard....
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