linux-kernel - RE: [PATCH v2 2/2] ALSA: set no sound proc fs for reduced memory footprint

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Message-ID: <E7B1D079BA13FB44A978CC8F69C7D6A90553AF54@SHSMSX101.ccr.corp.intel.com>
Date:	Wed, 27 May 2015 07:09:24 +0000
From:	"Jie, Yang" <yang.jie@...el.com>
To:	Takashi Iwai <tiwai@...e.de>
CC:	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	"broonie@...nel.org" <broonie@...nel.org>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Girdwood, Liam R" <liam.r.girdwood@...el.com>,
	"Zhang, Vivian" <vivian.zhang@...el.com>
Subject: RE: [PATCH v2 2/2] ALSA: set no sound proc fs for reduced memory
 footprint

> -----Original Message-----
> From: Takashi Iwai [mailto:tiwai@...e.de]
> Sent: Wednesday, May 27, 2015 2:19 PM
> To: Jie, Yang
> Cc: Sudip Mukherjee; broonie@...nel.org; alsa-devel@...a-project.org;
> linux-kernel@...r.kernel.org; Girdwood, Liam R; Zhang, Vivian
> Subject: Re: [PATCH v2 2/2] ALSA: set no sound proc fs for reduced memory
> footprint
> 
> At Wed, 27 May 2015 05:38:01 +0000,
> Jie, Yang wrote:
> >
> > > -----Original Message-----
> > > From: Sudip Mukherjee [mailto:sudipm.mukherjee@...il.com]
> > > Sent: Wednesday, May 27, 2015 12:50 PM
> > > To: Jie, Yang
> > > Cc: tiwai@...e.de; broonie@...nel.org; alsa-devel@...a-project.org;
> > > linux- kernel@...r.kernel.org; Girdwood, Liam R; Zhang, Vivian
> > > Subject: Re: [PATCH v2 2/2] ALSA: set no sound proc fs for reduced
> > > memory footprint
> > >
> > > On Tue, May 26, 2015 at 09:13:57PM +0800, Jie Yang wrote:
> > > > Disable sound proc fs, when CONFIG_SND_NO_PROC_FS is selected,
> > > > which can save about 9KB memory size for reducing memory footprint
> purpose.
> > > > ---
> > > missing Signed-off-by.
> >
> > Thanks for pointing out.
> >
> > Signed-off-by: Jie Yang <yang.jie@...el.com>
> >
> > Takashi, do I need to resend them?
> 
> Yes, but you seen to have missed my first comment.  Here again:
 
Sorry about the missing. :)

> 
> ==========================================================
> ======
> > +menuconfig SND_REDUCED_MEMORY_FOOTPRINT
> > +	bool "Reduced Memory Footprint Support"
> > +	default n
> > +	help
> > +	  Say 'Y' to enable Reduced Memory Footprint Support, which may
> > +	  reduce code size and data footprint as much as possible.
> 
> I'd like to move this into sound/core.
> Also, the kconfig name appears a bit too lengthy to me.
> ==========================================================
> ======
> 
> And, after reading this again, I wonder whether we just take the existing
> CONFIG_EXPERT for allowing the selection of more knobs like
> CONFIG_SND_PROC_FS.
> 
> SND_PROC_FS
> 	bool "Sound proc file" if EXPERT
 
Sounds good. Then we don't need 'SND_REDUCED_MEMORY_FOOTPRINT'
any more? Or we can keep it as root menu of the set of items, just as below?
(I changed it to SND_SMALL_FOOTPRINT, as your comment above)

menuconfig SND_SMALL_FOOTPRINT
	bool "Reduced Memory Footprint Support" if EXPERT
	default n
	help
	  Say 'Y' to enable Reduced Memory Footprint Support, which may
	  reduce code size and data footprint as much as possible.

config SND_PROC_FS
        bool "Sound Proc FS Support" if SND_SMALL_FOOTPRINT
        depends on PROC_FS
        default y
        help
          Say 'N' to disable Sound proc FS, which may reduce code size about
          9KB on x86_64 platform.
          If unsure say Y.

~Keyon

> 	depends on PROC_FS
> 	....
> 
> 
> Takashi
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