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Message-ID: <Y87ZnsULqjYzo6Y2@biznet-home.integral.gnuweeb.org>
Date: Tue, 24 Jan 2023 02:01:50 +0700
From: Ammar Faizi <ammarfaizi2@...weeb.org>
To: "Paul E. McKenney" <paulmck@...nel.org>
Cc: Willy Tarreau <w@....eu>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Shuah Khan <shuah@...nel.org>,
Linux Kselftest Mailing List
<linux-kselftest@...r.kernel.org>
Subject: Re: [PATCH 0/2] selftests/nolibc: small simplification of test
development phase
On Mon, Jan 23, 2023 at 09:40:03AM -0800, Paul E. McKenney wrote:
> I looked for that, but didn't find it, so thank you!
>
> (Yes, I should have used dpkg, but I was lazy.)
>
> Except that when I install Ubuntu 20.04's version, I get this:
>
> ------------------------------------------------------------------------
>
> $ sudo make run-user
> MKDIR sysroot/x86/include
> make[1]: Entering directory '/home/git/linux-rcu/tools/include/nolibc'
> make[2]: Entering directory '/home/git/linux-rcu'
> make[2]: Leaving directory '/home/git/linux-rcu'
> make[2]: Entering directory '/home/git/linux-rcu'
> INSTALL /home/git/linux-rcu/tools/testing/selftests/nolibc/sysroot/sysroot/include
> make[2]: Leaving directory '/home/git/linux-rcu'
> make[1]: Leaving directory '/home/git/linux-rcu/tools/include/nolibc'
> CC nolibc-test
> 32 gettimeofday_null = -1 EFAULT [FAIL]
> See all results in /home/git/linux-rcu/tools/testing/selftests/nolibc/run.out
>
> ------------------------------------------------------------------------
>
> I have attached run.out.
>
> In contrast, with my hand-built qemu-x86_64, all tests passed.
>
> This might be just a version-related bug, but figured I should let you
> guys know.
This is an interesting bug.
I'm a bit reluctant to say that this is a qemu bug. But I can't
reproduce it on my machine. I use qemu that comes from Ubuntu 22.04.
FWIW, my qemu version is:
$ qemu-x86_64 -version
qemu-x86_64 version 6.2.0 (Debian 1:6.2+dfsg-2ubuntu6.6)
Copyright (c) 2003-2021 Fabrice Bellard and the QEMU Project developers
I'll take a look at that gettimeofday() code and see if we have a bug in
it. In meantime, could you send your qemu version info?
--
Ammar Faizi
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