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=1793750026; b=HzBGV+SljxISJYSpIm7c3WzTz2Hs2ABXDDVO7H/N/8GTWp+NYr1JPnYaguBHpH0zq/2s cWWlsXlNWjH6mX+WUIXhcw6Uy3TEK67NoiZQ9OwE5ck4XAviYI0i4ZranISJYqnfDqZCq nWJ8UfZy2LOwS9XBrZ8rL7LdiadxxEmC9u6VkxZpZAWesn/0GRNeKRxelyoIRDcZdovOZ RiUcdIjuRWjDObo1IuY5VV+ioYTe5KvV7eMua0+fClk0r37H0T/K0wzLrgUE8AxCylEi1 goUKBd8OQvWGY5E0icCZ1n8Ns4+pRQWMnuz7cA6U2NlN63HLfAvj1RFNOC5FanzX51w== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793750026; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=vHhMl2J6DAPwMwyKkJVTS7RkudGR5EmledEdLMqudks=; b=mh2tyYc4rh31kX4B/ewDy/roUc9/p087GaloClxsxrqqB0C/PdPRXtr7CNmTxiwh3GhY bYpPcsngpMpM9zwOScai0TMAmpDwRySoQvW1BWyIy1a1Jd2+X9S78YovTAAr07FA3FJcw PR5ZumpDPjgIJKtBbkAyE+0n84h0NzzqQAp5W/8rf3PyzY7dkg507gvJeQ3ZML2odpe+y vPsfjcHCi2U6m2t94mrstC2UxgoHSI48n+AC1RX0j8OBAt88rwtbtCo+ZjLVXeIfPDqD6 AO3KWJOkJwocL+qJitxAEvHve43E4nyHvYJR86h8rqUdmrQ064wOx6OUjsd3S3f/7HA== 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=dzk1M7JE; 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 289A7606A32C for ; Tue, 3 Nov 2026 23:53:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=dzk1M7JE Received: by smtp.kernel.org (Postfix) with ESMTPSA id 93C8C1F000C1; Tue, 3 Nov 2026 23:53:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793750025; bh=vHhMl2J6DAPwMwyKkJVTS7RkudGR5EmledEdLMqudks=; h=From:Subject:Reply-To:To:In-Reply-To:References:Date; b=dzk1M7JE5knYstki90S9I16Pja6Vsfw7rcpVxh6BsKpVpeltXriyrFzPymYI7vjst gvgmnd4BvB9u9f5HAyRph+0oKgfksku/kV2T4jIUswmX4Zzg8D+1X5XAr42W16jSKG osJoaeIZIYgBdkLWIcryVkMxe2CCh+x8Uizxs3pVgKEkya0a1OOJCO1qBRPD+oXvEs 6eqyISqWqPeOlDOoVpDZWqlhfVBstA/A58XLcMjTTMnP0HXsL08WN8n7IMSJxxiO3R rkEefN3lFmAlZ3EWggAOWt8yxKn4LmD5b76jPkV6V/D0IrNRgnna+xU0DbDSMhjaZT tzFrLw9C5+xFA== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v1 01/41] perf env: Make lazy perf_env initialization thread-safe Reply-To: sashiko-reviews@lists.linux.dev To: "Ian Rogers" , linux-perf-users@vger.kernel.org In-Reply-To: <20261103234502.1008382-2-irogers@google.com> References: <20261103234502.1008382-1-irogers@google.com> <20261103234502.1008382-2-irogers@google.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Tue, 03 Nov 2026 23:53:45 +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/20261103234502.1008= 382-1-irogers@google.com?part=3D1