From: Micha Feigin (michf_at_nonexisting.hamakor.org.il)
Date: Thu 17 Jun 2004 - 00:45:07 IDT
On Wed, Jun 16, 2004 at 11:10:17PM +0300, Muli Ben-Yehuda wrote:
> On Wed, Jun 16, 2004 at 11:58:36PM +0300, guy keren wrote:
>
> > to sum it all up - we're back to the days of himem.sys and emm386.sys on
> > good old MSDOS, except that 896MB replaces the old 640KB on msdos (which
> > himem.sys lifted to a 1MB limit), and 'ZONE_HIGHMEM' comes instead of the
> > memory swapping performed by EMM386.sys .
> >
> > now, who was the linux geek that said "well, 1GB of memory should be
> > enough for anyone" ? :)
>
> That would be one Torvalds, Linus Torvalds :-)
>
> Just to show that while all software sucks, we still suck somewhat
> less than DOS, mingo came up with the 4:4 split, which gives the
> kernel its own 4GB of virtual address space, at the cost of a much
> more expensive context switch every time you switch from user space to
> kernel space, and vice versa, and much ugliness in the code. The real
> solution is, of course, a 64bit architecture. Anyone want to buy me a
> shiny G5?
>
What would be the drawback of the 2:2 split patch in this case? It
would give you only 2GB of memory instead of 4 but saves on the context
switches.
> Cheers,
> Muli
> --
> Muli Ben-Yehuda
> http://www.mulix.org | http://mulix.livejournal.com/
>
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