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Message-ID: <20070618180258.GA14985@elte.hu> Date: Mon, 18 Jun 2007 20:02:58 +0200 From: Ingo Molnar <mingo@...e.hu> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Miklos Szeredi <miklos@...redi.hu>, cebbert@...hat.com, chris@...ee.ca, linux-kernel@...r.kernel.org, tglx@...utronix.de, akpm@...ux-foundation.org Subject: Re: [BUG] long freezes on thinkpad t60 * Linus Torvalds <torvalds@...ux-foundation.org> wrote: > > Boots and runs fine. Fixes the freezes as well, which is not such a > > big surprise, since basically any change in that function seems to > > do that ;) > > Yeah, and that code really was *designed* to make all "locking in a > loop" go away. So unlike the patches adding random barriers and > cpu_relax() calls (which might fix it for some *particular* hw setup), > I pretty much guarantee that you can never get that code into a > situation where there is some lock being starved on *any* hw setup. > > Ingo, an ack for the patch, and I'll just apply it? yeah. It's definitely better than what we had before. Maybe one day someone frees us from this function =B-) We already had like 2-3 nasty SMP bugs related to it in the last 10 years. Acked-by: Ingo Molnar <mingo@...e.hu> and kudos to Miklos for the patience to debug this bug! Ingo - 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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