Re: smp overhead, and rwlocks considered harmful

Andrew Morton (akpm@digeo.com)
Sat, 22 Mar 2003 20:04:55 -0800

Anton Blanchard <anton@samba.org> wrote:
>
>
> > One thing is noteworthy: ia32's read_unlock() is buslocked, whereas
> > spin_unlock() is not.
>
> Dont forget bitops/atomics used as spinlocks like the rmap pte chain lock.
>

Did you end up deciding it was worthwhile putting a spinlock in the ppc64
pageframe for that? Or hashing for it.

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