linux-kernel - Re: [LTP] 12abeb544d: ltp.read_all

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Date:   Mon, 23 Sep 2019 17:39:08 +0200
From:   Petr Vorel <pvorel@...e.cz>
To:     Richard Palethorpe <rpalethorpe@...e.de>
Cc:     ltp@...ts.linux.it, Andy Lutomirski <luto@...nel.org>, lkp@...org,
        LKML <linux-kernel@...r.kernel.org>,
        Andy Lutomirski <luto@...capital.net>
Subject: Re: [LTP] 12abeb544d: ltp.read_all_dev.fail

Hi,

> > FYI, we noticed the following commit (built with gcc-7):

> > commit: 12abeb544d548f55f56323fc6e5e6c0fb74f58e1 ("horrible test hack")
> > https://kernel.googlesource.com/pub/scm/linux/kernel/git/luto/linux.git random/kill-it

...
> > tst_test.c:1108: INFO: Timeout per run is 0h 05m 00s
> > Test timeouted, sending SIGKILL!
> > tst_test.c:1148: INFO: If you are running on slow machine, try exporting LTP_TIMEOUT_MUL > 1
> > tst_test.c:1149: BROK: Test killed! (timeout?)

> So perhaps this is caused by reads of /dev/random hanging?

> At any rate,
> I suppose this is intended to deliberately break something, so we can
> ignore it.
Yep, I'd ignore it, [1] really looks like the commit description "horrible test hack" :)

Kind regards,
Petr

[1] https://kernel.googlesource.com/pub/scm/linux/kernel/git/luto/linux.git/+/12abeb544d548f55f56323fc6e5e6c0fb74f58e1%5E%21/#F0