linux-kernel - Re: [PATCH] selftests/nolibc: add 7 tests for memcmp()

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Message-ID: <20221026195224.GA24197@1wt.eu>
Date:   Wed, 26 Oct 2022 21:52:24 +0200
From:   Willy Tarreau <w@....eu>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:     "Paul E. McKenney" <paulmck@...nel.org>,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] selftests/nolibc: add 7 tests for memcmp()

On Wed, Oct 26, 2022 at 11:08:41AM +0200, Rasmus Villemoes wrote:
> On 26/10/2022 07.39, Willy Tarreau wrote:
> > 
> > No more false positives nor false negatives anymore. I'm sending you
> > the patch separately.
> 
> While you're at it, may I suggest also adding a few test cases where the
> buffers differ by 128, e.g. 0x0 v 0x80 and 0x40 v 0xc0.

I initially thought about it but changed my mind for +/- 0xc0 that
covered the same cases in my opinion. Do you have a particular error
case in mind that would be caught by this one that the other one does
not catch ? I'm fine for proposing a respin of the patch to improve
it if it brings some value, but I'm still failing to figure when that
would be the case.

Thanks,
Willy