linux-kernel - RE: [PATCH] mmc: Add config_host callback to set a mmc queue

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Message-ID: <000001db4ac3$b5584260$2008c720$@samsung.com>
Date: Tue, 10 Dec 2024 14:23:55 +0900
From: "Jangsub Yi" <jangsub.yi@...sung.com>
To: "'Christoph Hellwig'" <hch@...radead.org>
Cc: <ulf.hansson@...aro.org>, <linux-mmc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <junwoo80.lee@...sung.com>,
	<sh8267.baek@...sung.com>, <wkon.kim@...sung.com>
Subject: RE: [PATCH] mmc: Add config_host callback to set a mmc queue

> > On Thu, Nov 07, 2024 at 06:06:11PM +0900, ??? wrote:
> > > Currently, there is no way to configure a request queue on the host
> side.
> > > Although there are various exported symbols in
> > > kernel/block/blk-settings.c that can be used to configure a request
> > > queue, users cannot utilize them as needed.
> >
> > If you actually provided a user and didn't just try to offend the
> > kernel maintainers by submitting dead code I could explain you in
> > detail why youre idea is flawed.
> >
> If a machine uses both SD and MMC simultaneously, how should timeouts be
> set
> 
> for each? And if different timeout values need to be used depending on the
> manufacturer of the SD card, how can this be implemented? I believe it is
> not appropriate to make such changes in the core code. There needs to be a
> way to configure these settings per host.
> 
This is necessary to have separate policies for each device.
I will also implement the host modifications related to this content 
and try to upstream it. Please review the core modifications.