Re: Note describing poor dcache utilization under high memory pressure

From: Daniel Phillips (phillips@bonn-fries.net)
Date: Tue Jan 29 2002 - 07:33:57 EST

Next message: Hans Reiser: "[PATCH] ReiserFS 2.5 Update Patch Set 17 of 25"
Previous message: Padraig Brady: "Re: A modest proposal -- We need a patch penguin"
In reply to: Helge Hafting: "Re: Note describing poor dcache utilization under high memory pressure"
Next in thread: Rik van Riel: "Re: Note describing poor dcache utilization under high memory pressure"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

On January 29, 2002 12:54 pm, Helge Hafting wrote:
> Momchil Velikov wrote:
> >
> > >>>>> "Daniel" == Daniel Phillips <phillips@bonn-fries.net> writes:
> [...]
> > Daniel> It's only touching the ptes on tables that are actually used, so if a parent
> > Daniel> with a massive amount of mapped memory forks a child that only instantiates
> > Daniel> a small portion of it (common situation) then the saving is pretty big.
> >
> > Umm, all the ptes af the parent ought to be made COW, no ?
>
> Sure. But quite a few of them may be COW already, if the parent
> itself is a result of some earlier fork.

Right, or if the parent has already forked at least one child.

-- 
Daniel
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Next message: Hans Reiser: "[PATCH] ReiserFS 2.5 Update Patch Set 17 of 25"
Previous message: Padraig Brady: "Re: A modest proposal -- We need a patch penguin"
In reply to: Helge Hafting: "Re: Note describing poor dcache utilization under high memory pressure"
Next in thread: Rik van Riel: "Re: Note describing poor dcache utilization under high memory pressure"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b29 : Thu Jan 31 2002 - 21:01:01 EST