Ivan,
-----Original Message----- From: Ivan T. Ivanov iivanov@suse.de Sent: Wednesday, November 10, 2021 4:01 AM To: Vincent Fazio vfazio@xes-inc.com Cc: Mario Lombardo ml@akamo.de; u-boot@lists.denx.de Subject: Re: [External] - Slow MMC IO with Raspberry CM3+ Module
On 11-03 20:57, Vincent Fazio wrote:
Date: Wed, 3 Nov 2021 20:57:13 +0000 From: Vincent Fazio vfazio@xes-inc.com To: Mario Lombardo ml@akamo.de, "u-boot@lists.denx.de" u-boot@lists.denx.de Subject: RE: [External] - Slow MMC IO with Raspberry CM3+ Module Message-ID:
<BN1P110MB09373DD94630D64646C46DF69F8C9@BN1P110MB0937.NAMP11 0.PROD.OUT
LOOK.COM>
Tags: all uboot
Hi Vincent,
Mario,
-----Original Message----- From: U-Boot u-boot-bounces@lists.denx.de On Behalf Of Mario Lombardo Sent: Wednesday, November 3, 2021 5:40 AM To: u-boot@lists.denx.de Subject: [External] - Slow MMC IO with Raspberry CM3+ Module
Dear u-boot list,
I recently compiled (latest: 2021.10) code of uboot as a boot loader for the Compute Module 3+ (Raspberry). Everything works fine except
one issue:
the IO from the storage is extreme slow. I read about issues in the past related to ext file systems. However the present issue relates to both ext and fat file systems so I assume its cause is different.
Please see this series: https://usg02.safelinks.protection.office365.us/?url=https%3A%2F%2Fpat
chwork.ozlabs.org%2Fproject%2Fuboot%2Flist%2F%3Fseries%3D262375&am p;da
ta=04%7C01%7C%7Ca736ee7a8d7446c34adb08d9a430fdf3%7C2925f1cdbdc34 a76bb3
86159e20a17f1%7C0%7C0%7C637721352603649117%7CUnknown%7CTWFpb GZsb3d8eyJ
WIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D% 7C1000
&sdata=4snQV571x4aGlf7NwXnR%2B%2F5RgkyZ2MOMax%2FudbP6xu w%3D&re
served=0 And this RPi issue: https://usg02.safelinks.protection.office365.us/?url=https%3A%2F%2Fgit
hub.com%2Fraspberrypi%2Ffirmware%2Fissues%2F1619&data=04%7C0 1%7C%7
Ca736ee7a8d7446c34adb08d9a430fdf3%7C2925f1cdbdc34a76bb386159e20a1 7f1%7
C0%7C0%7C637721352603659112%7CUnknown%7CTWFpbGZsb3d8eyJWIjoi MC4wLjAwMD
AiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata= das1
lOBGq%2BMDOz7OlqbEbyBS9eXtrp7W5SQ25VteYLk%3D&reserved=0
Are your patches still needed? If I read the comments on the issue it was fixed in RPi firmware and your workaround is not needed, correct?
I think this is a fair question.
The patches are still needed for certain tagged versions of the RPi firmware. Later tags may resolve this problem but may also introduce their own regressions which force users back to a previous tag where this is a problem.
I think I would recommend including the patches so U-Boot works across all revisions of firmware and to future proof against subsequent changes in the clock API.
Ultimately, I defer to the maintainers' choice.
Regards, Ivan
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Vincent Fazio Embedded Software Engineer - ATS Extreme Engineering Solutions, Inc http://www.xes-inc.com