Subject: Re: kernel map entry merging and PR 24039
To: Jason Thorpe <thorpej@wasabisystems.com>
From: Andrew Brown <atatat@atatdot.net>
List: tech-kern
Date: 02/05/2004 01:21:52
>> how do you know 16 or so is enough?
>
>It's just a guess. What I'm assuming is that if you start with 16, and
>try to never let that drop below 8 (allocating more if you do), then
>you'll "never" run out. If you do, well, panic, for now, I guess.
>
>I'm just trying to offer suggestions that might lead to a better fix
>than simply disabling map entry merging for kernel maps.
how about some sort of "pool" allocator that keeps ~10% of freed map
entries around? ie, count when entries are allocated and attempts to
keep one free one on a list for every 10 that are in use?
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