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Date: Tue, 5 Aug 2008 14:18:55 +1000 From: Nick Piggin <nickpiggin@...oo.com.au> To: benh@...nel.crashing.org Cc: Andrew Morton <akpm@...ux-foundation.org>, Linus Torvalds <torvalds@...ux-foundation.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: Switching TestSetPageLocked to trylock_page On Tuesday 05 August 2008 14:01, Benjamin Herrenschmidt wrote: > > Yup. A mechanical rename-foo-to-bar can be prepared and merged late - > > there's little payback for the pain of maintaining it for a couple of > > months. > > > > Would prefer either that we hold off until after 2.6.27 is released or > > just do it now. > > I'd like to have the performance improvement on powerpc in 2.6.27 :-) Well I would too, but I won't push the actual performance improvements this time (maybe the lockdep work, though, if it is working). I will try to get the rename in, and then get the performance improvements into -mm and let Andrew merge when he's ready. To be honest, I'm satisfied that 2.6.27 contains enough potential for npiggin to have spectacularly broken the kernel... > I've always hated the way we abused bitops as locks, it's terribly > inefficient for us, so that's a nice cleanup as far as I'm concerned. I agree, especially for widely used locks like page and buffer lock. If *nothing* else it is much more readable... -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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