mini-heads-up: linuxulator fixes (Fw: cvs commit: src/sys/amd64/linux32 linux.h linux32_machdep.c linux32_sysvec.c syscalls.master src/sys/compat/linprocfs linprocfs.c src/sys/compat/linux linux_misc.c src/sys/i386/linux linux.h linux_machdep.c linux_sysvec.c)

[Ariff Abdullah]

On Sun, 8 Jul 2007 14:49:47 +0200
Alexander Leidinger <Alexander at Leidinger.net> wrote:
> Hi,
> 
> I MFCed some fixes to the linuxulator today. One major change is
> correcting the handling of the linux mmap function. This may break
> some not so good programmed audio programs (mostly some few bad
> behaving games). If you get hit by this, don't be afraid. The MFC of
> a change to the sound system (and an entry to UPDATING) will be done
> "soon" by Ariff.
>
Technically, this is not the fault of that particular audio apps.
Latest mmap changes in linuxlator apparently force PROT_EXEC mapping
on all _typical_ mmap invocations, and this affecting not just sound,
but bktr(4) as well. Well, bktr a bit lucky since I haven't encounter
any linux-binary + bktr apps.

Anyway, I've added sysctl hw.snd.compat_linux_mmap, where it is
disabled by default.

linux mmap breakage:
http://lists.freebsd.org/pipermail/freebsd-current/2007-June/073437.html

solution:
http://lists.freebsd.org/pipermail/cvs-src/2007-July/080531.html

> Except for those audio apps, all programs which had problems because
> of this should work better now. If you stumble upon a problem,
> please report to emulation at FreeBSD.org.
> 
> Note: while more MFCs of fixes and missing linux syscalls are
> planned (before 6.3), the MFC of the linux-2.6 compatibility is not
> planned (if you need it, you have to update to 7.0 release when it
> comes out).
> 
> If someone wants to help test some more patches for the linuxulator
> in -stable, please contact me and I take you into the loop (the more
> testers, the faster -stable will see the MFCs). What I need are
> people which compile and runtest the changes. Most of the changes
> are straight forward, we only have one part which causes a problem
> because of an unknown reason (either bad testing hardware or a
> missing change in my patches).
> 


--
Ariff Abdullah
FreeBSD

... Recording in stereo is obviously too advanced
    and confusing for us idiot ***** users :P ........
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