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SubjectRe: [PATCH] mm->rss is modified without page_table_lock held
At 06.42 09/12/00 -0800, David S. Miller wrote:

> Date: Sat, 09 Dec 2000 15:48:05 +0100
> From: Roberto Fichera <>
> >atomic_t does not guarentee a large enough range necessary for mm->rss
> If we haven't some atomic_t that can be negative we could define atomic_t
> as unsigned long for all arch,
> this is sufficient to fitting all the range for the mm->rss.
>32-bit Sparc has unsigned long as 32-bit, and the top 8 bits of the
>atomic_t are used for a spinlock, thus a 27-bit atomic_t, there
>is not enough precision.

8 bits for a spinlock ? What kind of use we have here ? All arch except Sparc32
don't have this trick.

Roberto Fichera.

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