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Re: What's an "MPSAFE" driver need to do?
On Mar 1, 2013, at 02:41 , Mouse <mouse%Rodents-Montreal.ORG@localhost> wrote:
>> BTW, you probably want to enable LOCKDEBUG.
> Okay. New kernel build running as I type this.
>> you'll probably see a very noticeable slowdown because of it, but it
>> picks up many many issues for you and is highly recommended for doing
>> MP driver development.
> Any particular reason it isn't present-but-commented in GENERIC, the
> way DEBUG is?
It is on some architectures, but not all. On my current sources:
netbsd:~/os/netbsd/src> grep LOCKDEBUG sys/arch/*/conf/GENERIC
sys/arch/amd64/conf/GENERIC:#options LOCKDEBUG # expensive locking
sys/arch/i386/conf/GENERIC:#options LOCKDEBUG # expensive locking
sys/arch/ia64/conf/GENERIC:#options LOCKDEBUG # expensive locking
sys/arch/mac68k/conf/GENERIC:#options LOCKDEBUG # kernel lock debugging
sys/arch/sbmips/conf/GENERIC:#options LOCKDEBUG # XXX XXX XXX XXX
> (Incidentally, what happened to ALL? I thought there
> was going to be an ALL for each arch, with everything that made sense.
> I don't see one in 5.2's sys/arch/amd64/conf, though.)
Same thing as above (lack of consistency across architectures), I believe.
netbsd:~/os/netbsd/src> ls sys/arch/*/conf/ALL
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