On Thu, 29 Jul 2004, Brent Casavant wrote:

On Thu, 29 Jul 2004, Hugh Dickins wrote:

quoted

Why doesn't the creator of the shm segment or /dev/zero mapping just
fault in all the pages before handing over to the other threads?

Performance.  The mapping could well range into the tens or hundreds
of gigabytes, and faulting these pages in parallel would certainly
be advantageous.

Oh, and let me clarify something.  I don't think anyone currently
performs mappings in the hundreds of gigabytes range.  But it probably
won't be too many years until that one happens.

But the basic point even at tens of gigabtyes is still valid.

-- 
Brent Casavant             bcasavan@sgi.com        Forget bright-eyed and
Operating System Engineer  http://www.sgi.com/     bushy-tailed; I'm red-
Silicon Graphics, Inc.     44.8562N 93.1355W 860F  eyed and bushy-haired.
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