Messages in this thread | | | From | "Albert D. Cahalan" <> | Subject | Re: RFC: pageable kernel-segments | Date | Tue, 17 Apr 2001 19:58:05 -0400 (EDT) |
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H. Peter Anvin writes: > By author: "Heusden, Folkert van" <f.v.heusden@ftr.nl>
>> Would anyone be intrested (besides me) in a kernel which can page ... >> Certain parts of drivers could get the __pageable prefix or so
> VMS does this. It at least used to have a great tendency to crash > itself, because it swapped out something that was called from a driver > that was called by the swapper -- resulting in deadlock. You need > iron discipline for this to work right in all circumstances. > > Second, it makes it quite hard to know what operations can cause a > task to sleep, since any reference to paged-out memory can require a > page-in and the associated schedule. You almost need pointer > annotation in order for this to be safe.
It wouldn't be nearly so dangerous to page from compressed data in memory. The memory could be ROM.
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