Re: CONFIG_BIGMEM and rawio
Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 2 Sep 1999 22:03:45 +0100 (BST)
> > And you can _safely_ use raw-io in a _stock_ 2.3.16 with bigmem enabled
> > too; you won't risk to crash the kernel but you'll get a graceful -EIO in
> > the _worst_ case.
> But this means that all user mode programs which plan to use raw-io must
> support fall-back to normal io. Even worse, [buggy] programs would run
> on
> test machines [with less memory], and fail in actual production [with
> more
> memory]. A bitflags would be a good idea.
Transparently using bounce buffers would be an even better idea.
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