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Date: Mon, 4 Dec 2023 14:28:13 -0800
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Subject: Re: [PATCH v1 bpf-next] selftests/bpf: Test bpf_kptr_xchg stashing of
 bpf_rb_root
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To: Dave Marchevsky <davemarchevsky@fb.com>, bpf@vger.kernel.org
Cc: Alexei Starovoitov <ast@kernel.org>,
 Daniel Borkmann <daniel@iogearbox.net>, Andrii Nakryiko <andrii@kernel.org>,
 Martin KaFai Lau <martin.lau@kernel.org>, Kernel Team <kernel-team@fb.com>
References: <20231204211722.571346-1-davemarchevsky@fb.com>
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From: Yonghong Song <yonghong.song@linux.dev>
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On 12/4/23 4:17 PM, Dave Marchevsky wrote:
> There was some confusion amongst Meta sched_ext folks regarding whether
> stashing bpf_rb_root - the tree itself, rather than a single node - was
> supported. This patch adds a small test which demonstrates this
> functionality: a local kptr with rb_root is created, a node is created
> and added to the tree, then the tree is kptr_xchg'd into a mapval.
>
> Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>

Acked-by: Yonghong Song <yonghong.song@linux.dev>