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From: Alexandre Oliva <lxoliva@fsfla.org>
To: Tom Li <tomli@tomli.me>
Cc: James Hogan <jhogan@kernel.org>,
	Jiaxun Yang <jiaxun.yang@flygoat.com>,
	Huacai Chen <chenhc@lemote.com>,
	Ralf Baechle <ralf@linux-mips.org>,
	linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC] On the Current Troubles of Mainlining Loongson Platform Drivers
Date: Mon, 11 Feb 2019 20:38:00 -0200	[thread overview]
Message-ID: <orimxq3q9j.fsf@lxoliva.fsfla.org> (raw)
In-Reply-To: <20190211125506.GA21280@localhost.localdomain> (Tom Li's message of "Mon, 11 Feb 2019 20:55:09 +0800")

On Feb 11, 2019, Tom Li <tomli@tomli.me> wrote:

> What is the current link to your repository? 

git://dev.lemote.com/linux-loongson-community.git

I use a different git URL to push stuff, so I wouldn't have noticed if
the above was gone, but I've just tried to git clone form the above and
it seems to remain functional.

> We've just identified and confirmed the source of the shutdown problem a
> few days ago on this mailing list. It's related to a PREEMPT race condition
> in the cpufreq framework that triggers a timing-dependent, probabilistic
> lockup in the i8259 PIC driver. And it was first noticed by Ville Syrjälä
> on a x86 system, my debugging rediscovered his findings.

Oooh, thanks for the links.

>> and, more recently, a very slow system overall, that's been present since
>> 4.20.

> The mainline framebuffer driver doesn't have any hardware drawing, printing
> even a single line on the console is required a full screen redraw via memory-

That doesn't seem to explain even a quiet boot up taking several times
longer than 4.19, and package installation over an ethernet connection
(thus not using the console) also taking several times longer.

-- 
Alexandre Oliva, freedom fighter   https://FSFLA.org/blogs/lxo
Be the change, be Free!         FSF Latin America board member
GNU Toolchain Engineer                Free Software Evangelist
Hay que enGNUrecerse, pero sin perder la terGNUra jamás-GNUChe

  reply	other threads:[~2019-02-11 22:38 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-08  8:30 [RFC] On the Current Troubles of Mainlining Loongson Platform Drivers Tom Li
2019-02-08 20:08 ` Paul Burton
2019-02-09 10:11   ` Tom Li
2019-02-09 19:38     ` Paul Burton
2019-02-11 12:13 ` Alexandre Oliva
2019-02-11 12:55   ` Tom Li
2019-02-11 22:38     ` Alexandre Oliva [this message]
2019-02-11 23:06       ` Aaro Koskinen
2019-02-12  4:39         ` tomli
2019-02-16 23:39         ` Alexandre Oliva
2019-02-17  4:59         ` Alexandre Oliva
2019-02-17 23:59           ` Aaro Koskinen
2019-02-18  1:37             ` Alexandre Oliva
2019-02-18  2:41               ` Maciej W. Rozycki
2019-03-07  6:41                 ` Alexandre Oliva
2019-03-07 17:59                   ` Maciej W. Rozycki
2019-03-08  0:46                     ` Alexandre Oliva
2019-03-08 23:56                       ` Maciej W. Rozycki
2019-05-26  9:19                         ` Alexandre Oliva
2019-06-10 21:49                           ` Aaro Koskinen
2019-06-12  5:55                             ` Maciej W. Rozycki
2019-06-12 19:24                               ` Aaro Koskinen
2020-01-23  0:20                                 ` Matt Turner
2020-01-24 18:58                                   ` Aaro Koskinen
2019-03-07 20:21                   ` Aaro Koskinen
2019-03-07 21:22                     ` Alexandre Oliva
2019-02-17  4:41     ` Alexandre Oliva

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