From: Wolfram Sang <w.sang@pengutronix.de>
To: Pierre Tardy <tardyp@gmail.com>
Cc: Philip Rakity <prakity@marvell.com>,
"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>
Subject: Re: [RFC} sdhci.c set_ios -- disable global interrupts and Question on Power Management
Date: Mon, 14 Feb 2011 10:55:28 +0100 [thread overview]
Message-ID: <20110214095528.GA30100@pengutronix.de> (raw)
In-Reply-To: <AANLkTikYYo4bJxQEa3+p=gE8iKNHxxbv7JPjB6vnywrs@mail.gmail.com>
> It looks like the mdelay are not in the fastpath, so why bother.
On embedded systems, we had audio streaming or CAN communication or similar
running in parallel. Currently, those mdelays (there are a couple, sadly)
produce significant latencies, e.g. when inserting/removing a card. The latter
gets especially bad with BROKEN_CARD_DETECTION.
The proper solution is probably to check the locking and see if it can be made
fine-granular, I'd assume?
Regards,
Wolfram
--
Pengutronix e.K. | Wolfram Sang |
Industrial Linux Solutions | http://www.pengutronix.de/ |
next prev parent reply other threads:[~2011-02-14 9:55 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-13 5:39 [RFC} sdhci.c set_ios -- disable global interrupts and Question on Power Management Philip Rakity
2011-02-13 10:25 ` Pierre Tardy
2011-02-13 17:57 ` Philip Rakity
2011-02-14 5:50 ` Philip Rakity
2011-02-14 9:29 ` Pierre Tardy
2011-02-14 9:55 ` Wolfram Sang [this message]
2011-02-14 17:27 ` Philip Rakity
2011-02-15 9:13 ` Wolfram Sang
2011-02-14 18:34 ` Philip Rakity
2011-02-14 18:41 ` Tardy, Pierre
2011-02-14 20:17 ` Philip Rakity
2011-02-14 20:44 ` Philip Rakity
2011-02-15 8:39 ` Wolfram Sang
2011-02-15 3:09 ` Philip Rakity
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