From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1BC75240611 for ; Mon, 14 Sep 2026 02:36:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789353385; cv=none; b=g+iNk65ZfRwYUXRj1ywVl0YNmP5gOm3W08dW9JT1R/EkNW4JVWh+AuCCayc0wv+nDyvSmhmF3tliOASJiVRVDmPMD9jZcsK6jlgvhZTw/rLP/TvEnETQeGLunMkGEGacOMdy5u4Nxxy3gzTc5euEgV69trz5MRk0hcERFznvgKc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789353385; c=relaxed/simple; bh=maDbxUJ23jkZXT/lz1mFFWNOLWvb9jCCWKxhK5n/vsg=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=ROcPVXjUAUtvtYqc/jeX+uqZoKwK2ngVAG3MTQs74/cdNgfOl4aNdJ1gBUodc3A+ftHhk0/BGrxpmweqODBNSmkjrrONefylRdjurUpBdT+sMGudWx6WflTXxyM08QoeQFIRwU1DRNlDuM6sDgV2AiZnQbdxZCECE6zBWRYUM98= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=W/sU5Hra; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="W/sU5Hra" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 76E3D1F000FF; Mon, 14 Sep 2026 02:36:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789353383; bh=maDbxUJ23jkZXT/lz1mFFWNOLWvb9jCCWKxhK5n/vsg=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=W/sU5HralWxeM5oKdob19jdOhZsclto8921TLaImxFiUzPL8iGFg9lDroDpVnR0Ew TbpR4H0hOpLlfVJv7HmzVAR8oQgZpNqjkBGtMnoM57FJC6tatvoRwOi5kYrVYoyrGP O2wyt0/DUPCm66YhwgxVjz+DZrSxuQksBPu8vLji6+HNbjN2KcmKi47s63yQ96lK1U f5ZwnY+hgmFYT87prJerSZZxkY1T1kqgx3hGT82wtAL8eGWJGyhPXLTtJ1Xldi1Vrh 0kwYWWmtDUkTig7AqqnihOvf+cUK35z5M0khyb8ZAhIrYXAx7wSfS6AkVfFdOk7IPG XAGoEoyFNXWGQ== From: sashiko-bot@kernel.org Subject: Re: [PATCH v4 02/16] perf/ring_buffer: stop using PG_private as AUX page high-order marker Reply-To: sashiko-reviews@lists.linux.dev To: "Zi Yan" Cc: linux-perf-users@vger.kernel.org In-Reply-To: <20260913-remove-pg_private-v4-2-848550f7574e@nvidia.com> References: <20260913-remove-pg_private-v4-0-848550f7574e@nvidia.com> <20260913-remove-pg_private-v4-2-848550f7574e@nvidia.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Mon, 14 Sep 2026 02:36:23 +0000 Message-Id: <20260914023623.76E3D1F000FF@smtp.kernel.org> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: > A high-order AUX page sets PG_private on its first page and stores the > order in first_page->private. Stop using PG_private and check > first_page->private for AUX page order only in the ring buffer and its > users. This is fine because page->private is 0 for order-0 AUX pages, > matching the page order. >=20 > It prepares for a future commit that remove PG_private. >=20 > No functional change intended. >=20 > Assisted-by: LLM > To: Peter Zijlstra > To: Ingo Molnar > To: Arnaldo Carvalho de Melo > To: Namhyung Kim > [ ... ] > Cc: linux-perf-users@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > Acked-by: Usama Arif > Acked-by: David Hildenbrand (Arm) > Signed-off-by: Zi Yan Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260913-remove-pg_= private-v4-0-848550f7574e@nvidia.com?part=3D2