Subject: Re: kernel map entry merging and PR 24039
To: None <firstname.lastname@example.org>
From: YAMAMOTO Takashi <email@example.com>
Date: 12/02/2004 23:26:43
> >can you explain what's an important difference? thanks.
> using up memory is simply not the same as reserving it. reserved
> memory can be used for something at a later point in time. used
> memory cannot.
memory used for map entries can be used for something else
when it's no longer needed (ie. after the map is unmapped.)
> imho, using 2000 instead of 200 (or even 20) map entries cannot be
> considered a reaonable solution to any problem. unless the problem is
> that you have too much ram. :)
if you have only 20 entries and haven't seen the deadlock problem,
it just means you're lucky enough.
i don't think it's reasonable to rely on the pure luck at all.
and of course, regardless of what pmap(1) shows, you always have
>=1000 reserved entries.