linux-kernel - Re: [patch v2 1/1] md: Software Raid autodetect dev list not array

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Message-ID: <4877c76c0708261218r2c1ed2eeg6d604eeb58f6b235@mail.gmail.com>
Date:	Sun, 26 Aug 2007 12:18:56 -0700
From:	"Michael Evans" <mjevans1983@...il.com>
To:	"Randy Dunlap" <randy.dunlap@...cle.com>
Cc:	"Michael J. Evans" <mjevans1983@...cast.net>,
	"Neil Brown" <neilb@...e.de>, "Ingo Molnar" <mingo@...hat.com>,
	linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [patch v2 1/1] md: Software Raid autodetect dev list not array

On 8/26/07, Randy Dunlap <randy.dunlap@...cle.com> wrote:
> On Sun, 26 Aug 2007 04:51:24 -0700 Michael J. Evans wrote:
>
> > From: Michael J. Evans <mjevans1983@...il.com>
> >

>
> Is there any way to tell the user what device (or partition?) is
> bein skipped?  This printk should just print (confirm) that
> node_detected_dev is NULL.  Shouldn't it just print <dev> in
> major:minor format?
>

It would be possible with the MAJOR() and MINOR() macros to do this...
however it doesn't really help out much during troubleshooting. I
tried using the bdevname function like the function that calls this
one uses, however, it wants a struct device_block... which I tried
getting with:

container_of(dev, struct block_device, bd_dev)

Of course this didn't quite work out, I got kernel panics on my two
trial attempts.

Here's a skip from a dmesg where I added a printk right under the line
in question.

[   63.033532] sd 11:0:0:0: [sdk] 976773168 512-byte hardware sectors
(500108 MB)
[   63.039842] sd 11:0:0:0: [sdk] Write Protect is off
[   63.046012] sd 11:0:0:0: [sdk] Mode Sense: 00 3a 00 00
[   63.046025] sd 11:0:0:0: [sdk] Write cache: enabled, read cache:
enabled, doesn't support DPO or FUA
[   63.052309]  sdk: sdk1 sdk2 sdk3 sdk4 sdk5 sdk6 sdk7 sdk8 sdk9
sdk10 sdk11 sdk12 sdk13 sdk14 sdk15
[   63.082546] md: Autodetect-buffering the above device.
[   63.088893] md: Autodetect-buffering the above device.
[   63.095053] md: Autodetect-buffering the above device.
[   63.101082] md: Autodetect-buffering the above device.
[   63.106956] md: Autodetect-buffering the above device.
[   63.112596] md: Autodetect-buffering the above device.
[   63.117998] md: Autodetect-buffering the above device.
[   63.123396] md: Autodetect-buffering the above device.
[   63.128789] md: Autodetect-buffering the above device.
[   63.134182] md: Autodetect-buffering the above device.
[   63.139576] md: Autodetect-buffering the above device.
[   63.144970] md: Autodetect-buffering the above device.
[   63.150360] md: Autodetect-buffering the above device.
[   63.155749] md: Autodetect-buffering the above device.
[   63.161498] sd 11:0:0:0: [sdk] Attached SCSI disk


> ---
> ~Randy
> *** Remember to use Documentation/SubmitChecklist when testing your code ***
>
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