From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 1283B332611; Thu, 26 Feb 2026 17:34:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772127273; cv=none; b=YRjGZoXFKAvCY0Q2xKg6og0PuXysXaf0hzo/EPNefDHpOvx2VhUCFg3lHajd+ybm7RRwzn7C+GsCoAp9YSYjPlEs1JvQLTqp+y7qf5zAyoQwX6d8ouIK1wvourpe2kITBXZwSFxhG5RQjpBhBRwvuSRcj+8+inO4Ed04U26mZaY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772127273; c=relaxed/simple; bh=7ckD0akXKp5yLmXPxmzZt9zqQrhBl/9sTG74HrNfedw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=gsxiOZePbVb3dgxuHAvgWv1ZhqE2wMyZ+3TJ6MbA166E26AK86QGLmLgR/mCcCxhy3GS3nieL9BnJS1cBjoY9ywJnqmeR9oEImBmAUdGSy25uCwiPTP0MMs/OVnj5FMTUnr8mJXBCD89Gl0A/3d/ajgYrJLKM/4D6/0RxkhOYew= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lEz4PawU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lEz4PawU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 853D4C116C6; Thu, 26 Feb 2026 17:34:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772127272; bh=7ckD0akXKp5yLmXPxmzZt9zqQrhBl/9sTG74HrNfedw=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=lEz4PawUesO+34+SHQ759Xpjio4FLMXg7qsEvPAXt0ZKKZO4I2kQ4PaZLARMQwY70 JBoK73NyWHncOGYZ3P5a+JchaTsq+1o+F2nmWq5n/qkXET0OEvENaTorD+3bKRxj4J W2cCZ+JQ6QuDmIaBB7mjSZuybtAsvMYYfL6T3HKRnsFe3L4t97d+NhK22On8HhnKI2 xAZ9VnipVJ0oVMnjy5SoQpUwtB/d5YUqm5ZqCyzhCldmx6Tek7RbEu0WgT3nj7utjh xgyFFPgywESchdOad4i81oO7pQWx6DpteJKQ9Bdk3l6dMrQjApdOtHkTbWO9tKVzf/ K7EUEwl/iLaBw== Message-ID: Date: Thu, 26 Feb 2026 18:34:24 +0100 Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/3] hv_balloon: Change default page reporting order To: Yuvraj Sakshith , akpm@linux-foundation.org, mst@redhat.com Cc: vbabka@suse.cz, surenb@google.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, linux-mm@kvack.org, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, virtualization@lists.linux.dev, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, longli@microsoft.com, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260226070125.3732265-1-yuvraj.sakshith@oss.qualcomm.com> <20260226070125.3732265-3-yuvraj.sakshith@oss.qualcomm.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 2/26/26 08:01, Yuvraj Sakshith wrote: > page_reporting_order used to fall back to default > value (passed as parameter or MAX_PAGE_ORDER) if > the driver wishes to not provide it. > > The way the driver used to do this was by passing > the order as zero. > > Now that zero is a valid order that can be passed by > a driver to page reporting, we use -1 to signal > default value to be used. > > Signed-off-by: Yuvraj Sakshith > --- > drivers/hv/hv_balloon.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c > index 2b4080e51..e33d6e3b2 100644 > --- a/drivers/hv/hv_balloon.c > +++ b/drivers/hv/hv_balloon.c > @@ -1663,7 +1663,7 @@ static void enable_page_reporting(void) > * We let the page_reporting_order parameter decide the order > * in the page_reporting code > */ > - dm_device.pr_dev_info.order = 0; > + dm_device.pr_dev_info.order = -1; > ret = page_reporting_register(&dm_device.pr_dev_info); > if (ret < 0) { > dm_device.pr_dev_info.report = NULL; Logically, that patch must come before #1. And the patch description should be rephrased to clarify that we want to change that behavior. Reviewed-by: David Hildenbrand (Arm) -- Cheers, David