Received-SPF: pass (google.com: domain of linux-kernel+bounces-197078-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.48.161 as permitted sender) client-ip=147.75.48.161;
Date: Fri, 31 May 2024 18:32:39 +0300
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Chia-I Wu <olvaffe@gmail.com>
Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
	christian.koenig@amd.com, alexander.deucher@amd.com,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Alison Schofield <alison.schofield@intel.com>,
	Dave Jiang <dave.jiang@intel.com>, Baoquan He <bhe@redhat.com>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] kernel/resource: optimize find_next_iomem_res
Message-ID: <Zlntl4m8ztZDNGwJ@smile.fi.intel.com>
References: <20240531053704.2009827-1-olvaffe@gmail.com>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20240531053704.2009827-1-olvaffe@gmail.com>
Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo

On Thu, May 30, 2024 at 10:36:57PM -0700, Chia-I Wu wrote:
> We can skip children resources when the parent resource does not cover
> the range.

> This should help vmf_insert_* users on x86, such as several DRM drivers.

vmf_insert_*()

> On my AMD Ryzen 5 7520C, when streaming data from cpu memory into amdgpu
> bo, the throughput goes from 5.1GB/s to 6.6GB/s.  perf report says

Also in the $Subj (and pay attention to the prefix)

"resource: ... find_next_iomem_res()"


-- 
With Best Regards,
Andy Shevchenko