Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Message-ID: <a61f6bc2dc18397de92e4b7cdd9b37e2dff7e114.camel@perches.com>
Subject: Re: [PATCH 2/4] amdgpu_ucode: reduce number of pr_debug calls
From:   Joe Perches <joe@perches.com>
To:     Jim Cromie <jim.cromie@gmail.com>, dri-devel@lists.freedesktop.org,
        amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org,
        intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org
Date:   Wed, 29 Sep 2021 19:08:51 -0700
In-Reply-To: <20210930014427.14239-3-jim.cromie@gmail.com>
References: <20210930014427.14239-1-jim.cromie@gmail.com>
         <20210930014427.14239-3-jim.cromie@gmail.com>
Content-Type: text/plain; charset="ISO-8859-1"
User-Agent: Evolution 3.40.0-1 
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

On Wed, 2021-09-29 at 19:44 -0600, Jim Cromie wrote:
> There are blocks of DRM_DEBUG calls, consolidate their args into
> single calls.  With dynamic-debug in use, each callsite consumes 56
> bytes of callsite data, and this patch removes about 65 calls, so
> it saves ~3.5kb.
> 
> no functional changes.

No functional change, but an output logging content change.

> RFC: this creates multi-line log messages, does that break any syslog
> conventions ?

It does change the output as each individual DRM_DEBUG is a call to
__drm_dbg which is effectively:

	printk(KERN_DEBUG "[" DRM_NAME ":%ps] %pV",
	       __builtin_return_address(0), &vaf);


> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c
[]
> @@ -30,17 +30,26 @@
> ?
> 
> ?static void amdgpu_ucode_print_common_hdr(const struct common_firmware_header *hdr)
> ?{
> -	DRM_DEBUG("size_bytes: %u\n", le32_to_cpu(hdr->size_bytes));
> -	DRM_DEBUG("header_size_bytes: %u\n", le32_to_cpu(hdr->header_size_bytes));
[]
> +	DRM_DEBUG("size_bytes: %u\n"
> +		  "header_size_bytes: %u\n"

etc...