linux-kernel - Re: [PATCH bpf-next v2 7/8] bpf: Add tests for task_local

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Message-ID: <20201103184714.iukuqfw2byls3s4k@ast-mbp.dhcp.thefacebook.com>
Date:   Tue, 3 Nov 2020 10:47:14 -0800
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     KP Singh <kpsingh@...omium.org>
Cc:     linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Paul Turner <pjt@...gle.com>,
        Jann Horn <jannh@...gle.com>, Hao Luo <haoluo@...gle.com>
Subject: Re: [PATCH bpf-next v2 7/8] bpf: Add tests for task_local_storage

On Tue, Nov 03, 2020 at 04:31:31PM +0100, KP Singh wrote:
> +
> +struct storage {
> +	void *inode;
> +	unsigned int value;
> +	/* Lock ensures that spin locked versions of local stoage operations
> +	 * also work, most operations in this tests are still single threaded
> +	 */
> +	struct bpf_spin_lock lock;
> +};

I think it's a good idea to test spin_lock in local_storage,
but it seems the test is not doing it fully.
It's only adding it to the storage, but the program is not accessing it.