From: "Pavel Machek" <pavel@denx.de>
To: cip-dev@lists.cip-project.org
Subject: Re: [cip-dev] BUG: using smp_processor_id() in preemptible [00000000] code: TCPTSK/1809
Date: Sun, 6 Jun 2021 21:14:33 +0200 [thread overview]
Message-ID: <20210606191433.GA18130@amd> (raw)
In-Reply-To: <trinity-6c08d14f-96d0-4b01-b81c-dbc85783818e-1622901051584@3c-app-gmx-bs72>
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Hi!
> <html><head></head><body>
Please avoid html on mailing lists.
> I'm useing the kernel 4.19.165-cip41-rt18 on the Altera
> SOCkit and I encountered an problem with high TCP traffic.
I notice you are using -rt kernel. Do you actually need realtime
features?
Can you try to reproduce the problem on 4.19.193?
> Can anybody tell me what problem this message triggers?
>
> The check_preemption_disabled function is called when
> smp_processor_id() is used. This function should be called with
> preemtion disabled, but I think migrate_enable will allways enable
> preemption ...
I believe you got your analysis mostly right, I'd have to study the
code some more to see what is going on.
Best regards,
Pavel
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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next prev parent reply other threads:[~2021-06-06 19:14 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-05 13:50 [cip-dev] BUG: using smp_processor_id() in preemptible [00000000] code: TCPTSK/1809 Rainer Kloud
2021-06-06 19:14 ` Pavel Machek [this message]
2021-06-07 4:31 ` rainer.kloud
2021-06-07 5:23 ` Rainer Kloud
2021-06-07 8:25 ` Jan Kiszka
2021-06-07 10:18 ` Rainer Kloud
2021-06-10 5:33 ` Jan Kiszka
2021-06-11 22:34 ` Pavel Machek
2021-06-15 4:56 ` Rainer Kloud
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