linux-kernel - Re: [PATCH 0/2] selftests/nolibc: small simplification of test development phase

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Message-ID: <20230123173439.GT2948950@paulmck-ThinkPad-P17-Gen-1>
Date:   Mon, 23 Jan 2023 09:34:39 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Willy Tarreau <w@....eu>
Cc:     linux-kernel@...r.kernel.org, Shuah Khan <shuah@...nel.org>,
        linux-kselftest@...r.kernel.org,
        Ammar Faizi <ammarfaizi2@...weeb.org>
Subject: Re: [PATCH 0/2] selftests/nolibc: small simplification of test
 development phase

On Mon, Jan 23, 2023 at 06:17:12PM +0100, Willy Tarreau wrote:
> Hello Paul,
> 
> On Mon, Jan 23, 2023 at 08:47:21AM -0800, Paul E. McKenney wrote:
> > And building from sources proved to be reasonably easy, so the test
> > now passes for me.  My initial thought of putting qemu-x86_64 into
> > my ~/bin directory fails the sudo test, but putting it into /usr/bin
> > works fine.
> 
> Great!
> 
> > Thank you for the hints!
> > 
> > Should I add a sentence to the commit log noting the potential need to
> > build qemu from the git repo and to install qemu-x86_64, give or take
> > what architecture one is running?
> 
> Well, I've always had all the variants for all supported archs and
> didn't know that sometimes only part of them could be installed.
> I've used and tested qemu-{i386,x86_64,arm,aarch64,mips,s390x,riscv64}
> with this with success, and all of them are built by default for me.
> Thus I'm not seeing a good reason for making a special case of x86_64.
> Or maybe I'm missing the point ?

Fair point, and yes, I am showing the x86-centricity of my test
environment.  ;-)  This might also apply to non-x86 distro setups,
but I have no idea either way.

I would be OK leaving it as is and responding to problems if and when
they actually occur.  But you are quite correct, if we do add some sort of
informative "Just build qemu!" diagnostic, it should be arch-independent.

							Thanx, Paul