From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794600322; b=LECKsAs+fk8ZDY3+YLRLZgpazMKVG8IULC/FPGn1GjaaCpJZVwJ8Mi5O+6PyCLwIrLsY oJU4BTW9TQvNqvsa5nZamlorI4MAOOyp1j19U982yO1YmxiL+SH7JVHJgeIwy6MGEp+F4 TrpTdTGhN5wYNaXqWZ8F3WU4Qp31pdL7FUfYzSwN9LgQOVr7U9MN7kXkGUUjRr7Snw+l4 9qmS8+tNwfa+aisZkKOs4yuMlnlNDx61HLEgJUSPRaaopVTbI1ANJFIMOgr3qTREMYPnb +thoaeYs2aIXpjLWGcoFfQLPAY+L0HpHdq2DbKd0NYiNt8K+b9g2N9+dnwWUvJ0QB/A== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794600322; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=DamFSyvc71ygRrYyWA5zXjbnXHxljf9qL61y//7XoRQ=; b=DYC8U0BNrkmfs1hxXiXAYEht4s6dTDrEY4zwbYcZGXx2/VKCuYTWEvWaWz1TgBoI7AyV kgPqsdzfWSk+91dzQ6u4NH7VzbYWCjU7MZYHa42PXu7+WcHf15CvXaH0cN06HsBUMOIqr SWAl871zQMK0tZukC5eOl2YiSzHXLCN0MPqJFsBMFqLW7o5tzP7iKKAYDub0yA0vD87c/ 7PjDvxg9BD5jWRc9oQPVtzOqJN1p7/J+A61yV8iFpxIIj4+nT30Xd1pZbdBejeuRI8lgw rw3EJiJfPdghYn4GFpAH/KEY5wZ3EZ7jL4iL3PTG81fJvBzbgdghz0nblP0Z65Gdj7g== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=jHLIldHt; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6BB0A606A32E for ; Fri, 13 Nov 2026 20:05:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=jHLIldHt Received: by smtp.kernel.org (Postfix) with ESMTPSA id D994E1F000C4; Fri, 13 Nov 2026 20:05:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794600322; bh=DamFSyvc71ygRrYyWA5zXjbnXHxljf9qL61y//7XoRQ=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=jHLIldHt5srAVn/t2fDm51yeY1Lk6+K1UttHK5T3XYNNeKtBnPEHRhMbkyqFtxlID eQan/li2nj4uEll50s3WNkUWj0MzLLaA914+1ynls8/jOKvp8eiJX7JDVwikwEN8Kf NN/IyBASaG5mgsjAEZdVfkKWWzXMmrdFW0VZI0QDftsaJGUWYa/eUJQ6/1d/+kdQOP QRYoxLgZBpI50DJ6x/Z2EtA2rS7tJg1fP4DTRMqGRjtkbnXqU623amTgvBN/AW/uRO OYMB110F4oEberGzZrbT+ey4iyhk+t1Rpbd7qJ++SRILQA6AZUPzB0G6+qRY9Xbb5m wv8gawgRsATjA== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v2 05/30] perf env: Make lazy perf_env initialization thread-safe Reply-To: sashiko-reviews@lists.linux.dev To: "Ian Rogers" Cc: linux-perf-users@vger.kernel.org In-Reply-To: <20261113195335.2865725-6-irogers@google.com> References: <20261113195335.2865725-1-irogers@google.com> <20261113195335.2865725-6-irogers@google.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 13 Nov 2026 20:05:21 +0000 X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > Guard lazy initialization of kernel_is_64_bit, nr_cpus_avail, e_machine, > cpuid, nr_pmu_mappings, pmu_mappings, and numa_map in struct perf_env > with env->lock, and use DO_ONCE() to initialize the cached host utsname > structure. This prevents data races when multiple threads concurrently > query a shared struct perf_env. >=20 > Signed-off-by: Ian Rogers Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261113195335.2865= 725-1-irogers@google.com?part=3D5