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

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Message-ID: <4D8DA2F5.1050008@fusionio.com>
Date:	Sat, 26 Mar 2011 09:25:25 +0100
From:	Jens Axboe <jaxboe@...ionio.com>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
CC:	Linus Torvalds <torvalds@...ux-foundation.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 2011-03-26 08:21, Geert Uytterhoeven wrote:
> On Sat, Mar 26, 2011 at 07:29, Jens Axboe <jaxboe@...ionio.com> wrote:
>> On 2011-03-25 22:35, Geert Uytterhoeven wrote:
>>> On Thu, Mar 24, 2011 at 14:43, Jens Axboe <jaxboe@...ionio.com> wrote:
>>>> Jens Axboe (20):
>>>>      block: remove per-queue plugging
>>>
>>> This one (commit 7eaceaccab5f40bbfda044629a6298616aeaed50) breaks IDE
>>> on Atari/m68k under ARAnyM. It hangs on:
>>>
>>> | ide: Falcon IDE controller
>>> | Probing IDE interface ide0...
>>> | hda: Sarge m68k, ATA DISK drive
>>> | ide0 at 0xfff00000 on irq 15 (serialized)
>>> | ide-gd driver 1.18
>>> | hda: max request size: 128KiB
>>> | hda: 2118816 sectors (1084 MB) w/256KiB Cache, CHS=2102/16/63
>>>
>>> The next expected line is the partition parsing:
>>>
>>> | hda: AHDI hda1 hda2
>>
>> Geert, does this work for you?
> 
> Yep.Thanks!

Great! I think we should place those blk_delay_queue() calls under the
if (rq), that should workd to and be more optimal. Can I ask you to
check that, too?

So:

if (rq) {
        blk_requeue_request(q, rq);
        blk_delay_queue(q, msecs_to_jiffies(3));
}

in both locations.

-- 
Jens Axboe

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