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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: James Cloos <cloos@jhcloos.com>
Cc: linux-fbdev-devel@lists.sourceforge.net,
	linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	"David S. Miller" <davem@davemloft.net>,
	Krzysztof Halasa <khc@pm.waw.pl>
Subject: Re: [Linux-fbdev-devel] radeonfb lockup in .28-rc (bisected)
Date: Tue, 04 Nov 2008 07:22:34 +1100	[thread overview]
Message-ID: <1225743754.8004.260.camel@pasglop> (raw)
In-Reply-To: <m33ai8akoo.fsf@lugabout.jhcloos.org>

On Mon, 2008-11-03 at 10:33 -0500, James Cloos wrote:
> >>>>> "Benjamin" == Benjamin Herrenschmidt <benh@kernel.crashing.org> writes:
> 
> >> is in play.  It is probably spinning through all of the 2000000 possible
> >> udelay(10) calls.  I don't think I ever gave it twenty seconds before
> >> giving up.  And certainly not forty seconds, if the freeze happens after
> >> setting the DST_Y_X register.
> 
> Benjamin> Well, setting DST_Y_X is what triggers the transfer. The above
> Benjamin> means that the FIFO isn't emptying (ie, the engine is locked up).
> 
> I gave it another try over the weekend and let it sit for five minutes.
> The reset message never appeared.

Because it's probably going to lockup trying to display it :-) I need to
make that stuff a bit more robust, by disabling acceleration if the
engine locks up for example.

> Again, that is fine by me.  Otherwise I'll just leave the #if0 commit
> in my compile clone.

Allright, we'll see what I come up with, and at worst, I'll just revert
the whole thing.

Ben.



      reply	other threads:[~2008-11-03 20:23 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <m31vy1k3ea.fsf@lugabout.jhcloos.org>
2008-10-28  0:00 ` David Miller
2008-10-28  1:46   ` James Cloos
2008-10-28  0:05 ` Benjamin Herrenschmidt
2008-10-28  1:50   ` James Cloos
2008-10-28  9:24   ` James Cloos
2008-11-02 21:48     ` [Linux-fbdev-devel] " Benjamin Herrenschmidt
2008-11-03  7:01       ` Paul Collins
2008-11-03  7:34         ` Benjamin Herrenschmidt
2008-11-04  6:49           ` Paul Collins
2008-11-04 21:33             ` Benjamin Herrenschmidt
2008-11-06  6:00               ` Paul Collins
2008-11-06  7:52                 ` Benjamin Herrenschmidt
2008-11-04 21:36             ` Benjamin Herrenschmidt
2008-11-05  8:39         ` Benjamin Herrenschmidt
2008-11-05 10:28           ` Paul Collins
2008-11-05 20:31             ` Benjamin Herrenschmidt
2008-11-06  3:49             ` Benjamin Herrenschmidt
2008-11-06  4:49               ` Paul Collins
2008-11-03 15:33       ` James Cloos
2008-11-03 20:22         ` Benjamin Herrenschmidt [this message]

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