Re: Minutes from Feb 21 LSE Call

William Lee Irwin III
2003-02-26T05:29:09Z

On Tue, 25 Feb 2003, William Lee Irwin III wrote:
>> My impression thus far is that the anonymous case has not been pressing
>> with respect to space consumption or cpu time once the file-backed code
>> is in place, though if it resurfaces as a serious concern the anonymous
>> rework can be pursued (along with other things).

On Wed, Feb 26, 2003 at 02:24:18AM -0300, Rik van Riel wrote:
> ... but making the anonymous pages use an object based
> scheme probably will make things too expensive.
> IIRC the object based reverse map patches by bcrl and
> davem both failed on the complexities needed to deal
> with anonymous pages.
> My instinct is that a hybrid system will work well in
> most cases and the worst case with mapped files won't
> be too bad.

The boxen I'm supposed to babysit need a high degree of resource
consciousness wrt. lowmem allocations, so there is a clear voice
on this issue. IMHO it's still an open question as to whether this
is efficient for replacement concerns, which may yet favor objects.

-- wli