linux-kernel - Re: Performance regression in ast drm driver

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Date:   Tue, 13 Nov 2018 13:16:11 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Jean Delvare <jdelvare@...e.de>
Cc:     Takashi Iwai <tiwai@...e.de>, David Airlie <airlied@...hat.com>,
        christian.koenig@....com,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Performance regression in ast drm driver

Hi

Am 13.11.18 um 13:08 schrieb Jean Delvare:
> Hi Thomas,
> 
> On Tue, 13 Nov 2018 10:23:45 +0100, Thomas Zimmermann wrote:
>> ast doesn't remove the vesafb's framebuffer before attaching to the
>> device. I have a patch at [1]. If you have a way of testing it, I'd
>> appreciate.
>>
>> [1] https://bugzilla.suse.com/show_bug.cgi?id=1112963
> 
> Thank you very much for looking into this bug. I tested the patch above
> and yes, it solves my console performance problem. The performance with
> your patch applied is roughly the same as with commit "drm/drivers: add
> support for using the arch wc mapping API" reverted.
> 

Great. I'll add it to SLE and also send it upstream soonish. Let's see
what Edward reports. Thanks for building a kernel for him.

Best regards
Thomas

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Linux GmbH, Maxfeldstr. 5, D-90409 Nürnberg
Tel: +49-911-74053-0; Fax: +49-911-7417755;  https://www.suse.com/
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard,
Graham Norton, HRB 21284 (AG Nürnberg)



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