Re: 3rd version of R/W mmap_sem patch available

[Linus Torvalds]

On Tue, 20 Mar 2001, Manfred Spraul wrote:
>
> Rik, did you check that {pte,pmd}_alloc are thread safe? At least in
> 2.4.2 they aren't (include/asm-i386/pgalloc.h), and your patch doesn't
> touch pgalloc.

Excellent point. We used to do all the looping and re-trying, but it got
ripped out a long time ago (and in any case, it historically didn't do
SMP, so the old code doesn't really work).

		Linus