vm_page_t related KBI [Was: Re: panic at vm_page_wire with FreeBSD 9.0 Beta 3]

Kostik Belousov kostikbel at gmail.com
Sun Nov 20 20:22:02 UTC 2011

On Sun, Nov 20, 2011 at 08:22:38PM +0100, Attilio Rao wrote:
> 2011/11/20 Kostik Belousov <kostikbel at gmail.com>:
> > On Sun, Nov 20, 2011 at 08:04:21PM +0100, Attilio Rao wrote:
> >> This other patch converts sx to a similar interface which cleans up vm_map.c:
> >> http://www.freebsd.org/~attilio/sxfileline.patch
> >>
> >> What do you think about it?
> >
> > This one only changes the KBI ? Note that _sx suffix is not reserved.
> In which sense?
> If you want to keep the shim support for KLD (thus the hard path) you
> will always need to keep an hard function and thus you still need a
> macro acting as a gate between the 'hard function' (or KLD version, if
> you prefer) and the fast case, that is where the "_" suffix came from.

As I see, right now kernel exports e.g. _sx_try_slock() for the hard path.
After the patch, it will export sx_try_slock_() for the same purpose.
The old modules, which call _sx_try_slock(), cannot be loaded into
the patched kernel. Am I reading the patch wrong ?
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