From: Petr Vorel <pvorel@suse.cz>
To: Andrea Cervesato <andrea.cervesato@suse.com>
Cc: ltp@lists.linux.it
Subject: Re: [LTP] [PATCH] tst_kconfig: Don't consider CONFIG_FAULT_INJECTION slow
Date: Tue, 17 Mar 2026 23:51:24 +0100 [thread overview]
Message-ID: <20260317225124.GA371512@pevik> (raw)
In-Reply-To: <69b94b3d.050a0220.29aff4.793b@mx.google.com>
Hi Andrea,
> Hi Petr,
> I didn't use fault injection extensively, but I read that when verbose mode is
> enabled we might have a big slowdown, so I wouldn't skip this check.
But it's default off. If one enables it, it could also increase LTP_RUNTIME_MUL.
IMHO the only effect now is 4* longer timeout on a kernel bug which freezes test
running.
> Eventually, we can implement a check that verifies if fault injection is enabled
> with a high verbosity. That would probably make more sense.
Do you mean to look if /sys/kernel/debug/fail*/verbose exist and contain 2?
https://origin.kernel.org/doc/html/latest/fault-injection/fault-injection.html#configure-fault-injection-capabilities-behavior
Kind regards,
Petr
> Regards,
--
Mailing list info: https://lists.linux.it/listinfo/ltp
next prev parent reply other threads:[~2026-03-17 22:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-16 12:40 [LTP] [PATCH] tst_kconfig: Don't consider CONFIG_FAULT_INJECTION slow Petr Vorel
2026-03-17 12:38 ` Andrea Cervesato via ltp
2026-03-17 22:51 ` Petr Vorel [this message]
2026-05-07 9:22 ` Cyril Hrubis
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