On 28.01.2022 08:56:19, Oliver Hartkopp wrote: > I've seen the frame processing sometimes freezes for one second when > stressing the isotp_rcv() from multiple sources. This finally freezes > the entire softirq which is either not good and not needed as we only > need to fix this race for stress tests - and not for real world usage > that does not create this case. Hmmm, this doesn't sound good. Can you test with LOCKDEP enabled? > > Therefore I created a V2 patch which uses the spin_trylock() to simply drop > the incomming frame in the race condition. > > https://lore.kernel.org/linux-can/20220128074327.52229-1-socketcan@xxxxxxxxxxxx/T/ > > Please take a look, if it also fixes the issue in your test setup. regards, Marc -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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