Subject: Re: Add a MAP_ALIGNED flag for mmap(2).
To: Bill Studenmund <firstname.lastname@example.org>
From: Jason R Thorpe <email@example.com>
Date: 03/02/2003 13:17:12
On Sun, Mar 02, 2003 at 12:25:18PM -0800, Bill Studenmund wrote:
> While I see the purity of adding an extra argument, I like the idea of
> using flags. We have a good number open, and using them would mean not
> changing a lot of called routines.
I guess I don't really care enough about the purity of the extra argument
to put up much of a fight :-)
> I also like listing the alignment in terms of bytes, not pages, since it
> means userland code doesn't care what the internal page size is. Also it
> might help emulation if future systems raise the page size (like say we go
> from 4k to 8k or 8k to 16k as part of a CPU transition) - we don't have to
> keep track of the implicit page size.
Yah, I definitely think it should be in bytes. I must admit that the log2
use of the flags argument is a clever hack :-)
-- Jason R. Thorpe <firstname.lastname@example.org>