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From: Francisco Jerez <currojerez-sGOZH3hwPm2sTnJN9+BGXg@public.gmane.org>
To: Chris Ball <cjb-2X9k7bc8m7Mdnm+yROfE0A@public.gmane.org>
Cc: David Airlie <airlied-cv59FeDIM0c@public.gmane.org>,
	kgdb-bugreport-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
	nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
	Jesse Barnes <jbarnes-Y1mF5jBUw70BENJcbMCuUQ@public.gmane.org>,
	Jason Wessel
	<jason.wessel-CWA4WttNNZF54TAoqtyWWQ@public.gmane.org>
Subject: Re: [PATCH] drm/nouveau/kms: Implement KDB debug hooks for nouveau KMS.
Date: Sat, 21 Aug 2010 04:22:24 +0200	[thread overview]
Message-ID: <87eidsemcf.fsf@riseup.net> (raw)
In-Reply-To: <m3aaoimqrp.fsf_-_-0VGQAjvlmrQzNDMTQreKSUB+6BGkLq7r@public.gmane.org> (Chris Ball's message of "Thu, 19 Aug 2010 13:55:06 -0400")


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Chris Ball <cjb-2X9k7bc8m7Mdnm+yROfE0A@public.gmane.org> writes:

> Hi,
>
> Here's a patch to add support for KMS debugging to Nouveau, along the
> style of the previous patches for Intel¹ and Radeon².  I'm only able
> to test on nv50 here, so a test on nv04 would be much appreciated,
> and I've published instructions on how to test here³.  Thanks!
>
There is a problem with this on pre-nv20 cards. Fbcon acceleration won't
work properly with IRQs disabled because you miss the context switching
interrupts: You'll get a locked up fbcon if you hit sysrq-g when there's
some process using the GPU.

I'd suggest disabling acceleration while in debug mode (e.g. using
nouveau_fbcon_save_disable_accel()). That aside the patch looks good to
me.

> - Chris.
>
> ¹:  http://lkml.org/lkml/2010/8/5/280
> ²:  http://dev.laptop.org/~cjb/kdb-radeon.patch
> ³:  http://blog.printf.net/articles/2010/08/19/kdb-kms-for-nouveau-radeon
>
>
> [...]

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  parent reply	other threads:[~2010-08-21  2:22 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <m3iq9yqd7w.fsf@pullcord.laptop.org>
     [not found] ` <4C5ACF3F.8050409@windriver.com>
     [not found]   ` <m3hbj0fju3.fsf_-_@pullcord.laptop.org>
2010-08-19 17:55     ` [PATCH] drm/nouveau/kms: Implement KDB debug hooks for nouveau KMS Chris Ball
     [not found]       ` <m3aaoimqrp.fsf_-_-0VGQAjvlmrQzNDMTQreKSUB+6BGkLq7r@public.gmane.org>
2010-08-21  2:22         ` Francisco Jerez [this message]
2010-08-23 20:50           ` Chris Ball
     [not found]             ` <m3k4nhqcia.fsf_-_-0VGQAjvlmrQzNDMTQreKSUB+6BGkLq7r@public.gmane.org>
2010-08-26 16:55               ` Francisco Jerez
2010-09-26 11:20             ` Jason Wessel
2010-09-01  9:56         ` Maxim Levitsky
2010-09-01 11:35           ` [Nouveau] " Jason Wessel
2010-09-02 10:46             ` Maxim Levitsky
2010-09-22  1:42               ` Maxim Levitsky
2010-09-22 14:03                 ` Maxim Levitsky
2010-09-22 14:06                   ` Maxim Levitsky
2010-09-22 17:07                     ` Maxim Levitsky
2010-09-24 20:50                       ` Maxim Levitsky
2010-09-24 20:58                         ` Jason Wessel
2010-09-25  0:14                           ` Maxim Levitsky
2010-09-25  4:08                             ` Dmitry Torokhov
2010-10-05 20:56                               ` Jason Wessel
2010-10-14  2:34                                 ` Maxim Levitsky
2010-10-20 16:01                                   ` sysrq filter and stuck keys [ was Re: [Nouveau] [PATCH] drm/nouveau/kms: Implement KDB debug hooks for nouveau KMS.] Jason Wessel
2010-10-23  2:29                                     ` Maxim Levitsky
2010-10-27 12:51                                       ` Jason Wessel

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