linux-kernel - Re: sleep before boot panic

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Message-Id: <20080115013847.35dad92e.akpm@linux-foundation.org>
Date:	Tue, 15 Jan 2008 01:38:47 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Bernd Schubert <bernd-schubert@....de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: sleep before boot panic

On Sun, 6 Jan 2008 19:08:42 +0100 Bernd Schubert <bernd-schubert@....de> wrote:

> Hi,
> 
> I just switched to libata (pata) on my laptop and the immediate panic made it 
> impossible to figure out why my boot partition wasn't available.
> After applying this little patch I could check boot printk output and then saw 
> everything was properly recognized and only scsi-disk support was missing.
> 
> 
> Signed-off-by: Bernd Schubert <bernd-schubert@....de>
> 
> Index: zd1211rw.git.beno/init/do_mounts.c
> ===================================================================
> --- zd1211rw.git.beno.orig/init/do_mounts.c	2008-01-06 18:44:23.000000000 
> +0100

Your email client is wordwrapping things.

> +++ zd1211rw.git.beno/init/do_mounts.c	2008-01-06 18:45:44.000000000 +0100
> @@ -330,6 +330,7 @@
>  		printk("Please append a correct \"root=\" boot option; here are the 
> available partitions:\n");
>  
>  		printk_all_partitions();
> +		msleep(60 * 1000);
>  		panic("VFS: Unable to mount root fs on %s", b);
>  	}

We could borrow the existing pause_on_oops stuff and use it in panic().

Or we could copy it into a new pause_on_panic, but it's hard to see a use
case where they need to be separate.

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