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From: Ivid Suvarna <ivid.suvarna@gmail.com>
To: Kernel development list <linux-kernel@vger.kernel.org>,
	kernelnewbies@kernelnewbies.org
Subject: Softlockup and Hardlockup sample test module
Date: Sun, 15 Apr 2018 13:17:27 +0530	[thread overview]
Message-ID: <CABXF_ACzu=+AKYqPyZwFzFw95KrczVEKaYifmOVuv=YhsvcTtQ@mail.gmail.com> (raw)

Hi All,

Could you please provide some sample test module for causing a
Softlockup and Hardlockup in latest kernel for SMP for testing
purposes. I assume there are some Kconfigs to be enabled as well for
this.

I had tried with the module where I put a busy loop inside spinlock
but was not able to cause any lockups. Maybe this is because of SMP
which schedule the job to other CPU. "How do I make a task to run on
single CPU only?"

I only get RCU stalls sometimes instead of softlockup when I use busy
loop inside a spinlock. Is there any explanation for difference
between these stalls and softlockup.

Thanks,
IVID

             reply	other threads:[~2018-04-15  7:47 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-15  7:47 Ivid Suvarna [this message]
2018-04-15 19:12 ` valdis.kletnieks
2018-04-15 22:19 ` Cong Wang
  -- strict thread matches above, loose matches on Subject: below --
2018-04-15  5:41 Ivid Suvarna

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