Messages in this thread | | | Date | Thu, 16 Sep 2004 16:01:16 -0700 | Subject | Re: [patch] remove the BKL (Big Kernel Lock), this time for real | From | Bill Huey (hui) <> |
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On Thu, Sep 16, 2004 at 03:54:12PM -0700, David S. Miller wrote: > On Thu, 16 Sep 2004 15:51:02 -0700 > Bill Huey (hui) <bhuey@lnxw.com> wrote: > > > Judging from how the Linux code is done and the numbers I get from > > Bill Irwin in casual conversation, the Linux SMP approach is clearly > > the right track at this time with it's hand honed per-CPU awareness of > > things. The only serious problem that spinlocks have as they aren't > > preemptable, which is what Ingo is trying to fix. > > This is what Linus proclaimed 6 or 7 years ago when people were > trying to convince us to do things like Solaris and other big > Unixes at the time.
FreeBSD's SMPng project is stalled for the most part and developers that disagree with that approach have move onto the DragonFly BSD community. It has a much more top-down driven locking system that's conceptually CPU local called tokens, effectively deadlock free and difficult to misused. It's already been able to multi-thread the networking stack using lock-less techniques, while the FreeBSD-current tree had to retract their "all or nothing" approach with threading their network stack. Jeffery Hsu is the main developer pushing that subsystem.
bill
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