Re: [patch] generic rwsems

Nick Piggin
2007-04-13T11:20:30Z

On Fri, Apr 13, 2007 at 12:53:49PM +0200, Andi Kleen wrote:
> On Friday 13 April 2007 12:04:16 Nick Piggin wrote:
> > OK, this patch is against 2.6.21-rc6 + Mathieu's atomic_long patches.
> >
> > Last time this came up I was asked to get some numbers, so here are
> > some in the changelog, captured with a simple kernel module tester.
> > I got motivated again because of the MySQL/glibc/mmap_sem issue.
> >
> > This patch converts all architectures to a generic rwsem implementation,
> > which will compile down to the same code for i386, or powerpc, for
> > example, and will allow some (eg. x86-64) to move away from spinlock
> > based rwsems.
> >
> > Comments?
>
> Fine for me from the x86-64 side. Some more validation with a test suite
> would be good though.

David had a test suite somewhere, so I'll give that a run.