netdev - Re: [PATCH] test_bpf: Fix testing with CONFIG_BPF_JIT_ALWAYS

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Message-ID: <46037c83-d612-63f7-00d2-d37a35ca4fe7@iogearbox.net>
Date:   Tue, 20 Mar 2018 23:07:08 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Thadeu Lima de Souza Cascardo <cascardo@...onical.com>,
        netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Yonghong Song <yhs@...com>,
        Alexei Starovoitov <ast@...nel.org>
Subject: Re: [PATCH] test_bpf: Fix testing with CONFIG_BPF_JIT_ALWAYS_ON=y on
 other arches

On 03/20/2018 01:58 PM, Thadeu Lima de Souza Cascardo wrote:
> Function bpf_fill_maxinsns11 is designed to not be able to be JITed on
> x86_64. So, it fails when CONFIG_BPF_JIT_ALWAYS_ON=y, and
> commit 09584b406742 ("bpf: fix selftests/bpf test_kmod.sh failure when
> CONFIG_BPF_JIT_ALWAYS_ON=y") makes sure that failure is detected on that
> case.
> 
> However, it does not fail on other architectures, which have a different
> JIT compiler design. So, test_bpf has started to fail to load on those.
> 
> After this fix, test_bpf loads fine on both x86_64 and ppc64el.
> 
> Fixes: 09584b406742 ("bpf: fix selftests/bpf test_kmod.sh failure when CONFIG_BPF_JIT_ALWAYS_ON=y")
> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@...onical.com>

Yep, agree. Applied to bpf tree, thanks Thadeu!