Re: [PATCH] mm->rss is modified without page_table_lock held

[David S. Miller]

   Date: Sat, 09 Dec 2000 15:48:05 +0100
   From: Roberto Fichera <[EMAIL PROTECTED]>

   >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.

Later,
David S. Miller
[EMAIL PROTECTED]
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