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From: Bryan Butler <Bryan.Butler@kratosdefense.com>
To: Philippe Gerum <rpm@xenomai.org>,
	Russell Johnson <russell.johnson@kratosdefense.com>
Cc: "xenomai@lists.linux.dev" <xenomai@lists.linux.dev>,
	Shawn McManus <shawn.mcmanus@kratosdefense.com>
Subject: RE: [External] - Re: EVL Memory
Date: Mon, 21 Nov 2022 18:33:36 +0000	[thread overview]
Message-ID: <BN2P110MB1288677543F1950D08808B3B8F0A9@BN2P110MB1288.NAMP110.PROD.OUTLOOK.COM> (raw)
In-Reply-To: <877czothz0.fsf@xenomai.org>

Hi Philippe, just to let you know this is a holiday week here in the US, and Russell is out until next Monday. Those of us left will try to update our build, but we may not be able to test it thoroughly. Just wanted you to know since you may not hear much from us for the next week.

-----Original Message-----
From: Philippe Gerum <rpm@xenomai.org> 
Sent: Monday, November 21, 2022 8:56 AM
To: Russell Johnson <russell.johnson@kratosdefense.com>
Cc: xenomai@lists.linux.dev; Bryan Butler <Bryan.Butler@kratosdefense.com>; Shawn McManus <shawn.mcmanus@kratosdefense.com>
Subject: Re: [External] - Re: EVL Memory

CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.


Russell Johnson <russell.johnson@kratosdefense.com> writes:

> [[S/MIME Signed Part:Undecided]]
> After fixing that line of code that was causing errors with building 
> the EVL kernel, I was able to successfully build. I am now running our 
> scenario that was causing issues previously. I will let you know what 
> issues (if any) I run into.
>
> To your other point, I can confirm that the priorities that are being 
> boosted are never being cleared back to the original base priorities.. 
> What do you recommend looking at first in order to figure out why this 
> is happening?
>

I could not reproduce this PI deboosting issue yet, however I eventually figured out the reason for the lockup - which may translate to RCU warnings on your system with many CPUs: this is a Dovetail issue wrt lockdep support. IOW, the bug is in the lock debug infrastructure, caused by adding interrupt pipelining to the picture.

You can work around this issue until fixed by disabling PROVE_LOCKING and LOCKDEP entirely (which is also enabled by DEBUG_LOCK_ALLOC and DEBUG_WW_MUTEX_SLOWPATH indirectly).

--
Philippe.

  reply	other threads:[~2022-11-21 18:33 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <PH1P110MB1050AD875FCD924D827A0A54E23E9@PH1P110MB1050.NAMP110.PROD.OUTLOOK.COM>
     [not found] ` <PH1P110MB10508DD9688B7D0E82AB30CDE23E9@PH1P110MB1050.NAMP110.PROD.OUTLOOK.COM>
2022-11-09 17:04   ` EVL Memory Russell Johnson
2022-11-09 17:20     ` Philippe Gerum
2022-11-11 21:34       ` [External] - " Russell Johnson
2022-11-14  9:53         ` Philippe Gerum
2022-11-14 22:42           ` Russell Johnson
2022-11-15  8:33             ` Philippe Gerum
2022-11-15 17:05               ` Russell Johnson
2022-11-15 18:36                 ` Philippe Gerum
2022-11-16 15:48                   ` Philippe Gerum
2022-11-16 21:37                     ` Russell Johnson
2022-11-17 16:48                       ` Philippe Gerum
2022-11-17 16:57                         ` Russell Johnson
2022-11-17 17:03                           ` Philippe Gerum
2022-11-17 17:37                             ` Russell Johnson
2022-11-18  8:06                               ` Philippe Gerum
2022-11-18 21:08                                 ` Russell Johnson
2022-11-17 22:19                             ` Russell Johnson
2022-11-18  8:02                               ` Philippe Gerum
2022-11-18  8:08                         ` Philippe Gerum
2022-11-19 16:37                           ` Russell Johnson
2022-11-19 16:42                             ` Philippe Gerum
2022-11-19 16:50                               ` Russell Johnson
2022-11-19 18:11                               ` Russell Johnson
2022-11-20  8:25                                 ` Philippe Gerum
2022-11-21 15:56                             ` Philippe Gerum
2022-11-21 18:33                               ` Bryan Butler [this message]
2022-11-28 15:21                                 ` Russell Johnson
2022-11-28 16:49                                   ` Philippe Gerum
2022-11-28 20:59                                     ` Russell Johnson
     [not found]                                       ` <0082bff2d91b0125ac60050159d3003e64b45bffa35e0c4f0ed9799e38b97b8c@mu>
2022-11-30 15:57                                         ` Philippe Gerum
2022-12-01 14:36                                           ` Philippe Gerum
2022-12-01 20:01                                             ` Russell Johnson
2022-12-02  9:18                                               ` Philippe Gerum
2022-12-02 15:12                                                 ` Russell Johnson
2022-12-02 15:27                                                   ` Philippe Gerum
2022-12-02 15:38                                                     ` Philippe Gerum
2022-12-02 20:50                                                       ` Russell Johnson
2022-12-03 11:37                                                         ` Philippe Gerum
2022-12-02 15:48                                                     ` Russell Johnson
2022-12-02 16:50                                                       ` Philippe Gerum
2022-12-02 17:22                                                       ` Philippe Gerum
2022-12-02 22:26                                                         ` Russell Johnson
2022-12-03 11:37                                                           ` Philippe Gerum
2022-12-03 15:44                                                             ` Philippe Gerum
2022-12-04 11:05                                                               ` Philippe Gerum
2022-12-04 18:05                                                                 ` Philippe Gerum
2022-12-04 18:43                                                                   ` Russell Johnson
2022-12-05  6:53                                                                   ` Russell Johnson
2022-12-05  6:59                                                                     ` Russell Johnson
2022-12-05  8:24                                                                       ` Philippe Gerum
2022-12-05 16:31                                                                         ` Russell Johnson
2022-12-05 16:38                                                                           ` Russell Johnson
2022-12-05 17:01                                                                             ` Philippe Gerum
2022-12-05  8:45                                                                     ` Philippe Gerum
2022-11-14 23:33           ` Russell Johnson

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