Messages in this thread |  | | Date | Sat, 28 Aug 2004 01:36:02 +0200 | | From | Andi Kleen <> | | Subject | Re: page fault scalability patch final : i386 tested, x86_64 support added |
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> Index: linux-2.6.9-rc1/include/linux/sched.h > =================================================================== > --- linux-2.6.9-rc1.orig/include/linux/sched.h 2004-08-25 10:50:12.534021000 -0700 > +++ linux-2.6.9-rc1/include/linux/sched.h 2004-08-27 12:14:09.564008624 -0700 > @@ -197,9 +197,10 @@ > pgd_t * pgd; > atomic_t mm_users; /* How many users with user space? */ > atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */ > + atomic_t mm_rss; /* Number of pages used by this mm struct */
atomic_t is normally 32bit, even on a 64bit arch. This will limit the max memory size per process to 2^(32+PAGE_SHIFT). I don't think that's a good idea.
On some architectures it used to be 24bit only even, but I think that has been fixed.
I think you need atomic64_t
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