linux-kernel - Re: [GIT PULL] Core block IO bits for 2.6.39

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Message-ID: <AANLkTi=jcm8pLQCTwYPK_Ey1SbMYSqQhYD4fJmCNz7sS@mail.gmail.com>
Date:	Sat, 26 Mar 2011 09:48:37 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Jens Axboe <jaxboe@...ionio.com>
Cc:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Chris Mason <chris.mason@...cle.com>,
	"Linux/m68k" <linux-m68k@...r.kernel.org>
Subject: Re: [GIT PULL] Core block IO bits for 2.6.39

On Fri, Mar 25, 2011 at 11:29 PM, Jens Axboe <jaxboe@...ionio.com> wrote:
> +
> +       /* Use 3ms as that was the old plug delay */
> +       blk_delay_queue(q, msecs_to_jiffies(3));

That's bogus. blk_delay_queue() already takes msecs, not jiffies.

Also, do we really need to delay every unplug like this? It seems sad.
A 3ms delay is a long time these days - admittedly most people
hopefully use ATA these days if they have an SSD or something, but
still..

                  Linus
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