linux-kernel - Re: [PATCH] block: Remove annoying "unknown partition table" message

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Date:	Thu, 22 Jan 2015 14:47:49 +0200
From:	Boaz Harrosh <boaz@...xistor.com>
To:	Jens Axboe <axboe@...com>, Christoph Hellwig <hch@...radead.org>
CC:	Tony Luck <tony.luck@...il.com>,
	Matthew Wilcox <willy@...ux.intel.com>,
	Dmitry Monakhov <dmonakhov@...nvz.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	"Martin K. Petersen" <martin.petersen@...cle.com>
Subject: Re: [PATCH] block: Remove annoying "unknown partition table" message

On 01/22/2015 02:39 PM, Boaz Harrosh wrote:
> From: Boaz Harrosh <boaz@...xistor.com>
> 
> As Christoph put it:
>   Can we just get rid of the warnings?  It's fairly annoying as devices
>   without partitions are perfectly fine and very useful.
> 
> Me too I see this message every VM boot for ages on all my
> devices. Would love to just remove it. For me a partition-table
> is only needed for a booting BIOS, grub, and stuff.
> 
> CC: Christoph Hellwig <hch@...radead.org>
> Signed-off-by: Boaz Harrosh <boaz@...xistor.com>

Jens Hi

Sorry for the delay, was unavailable from beginning of the week.

I have tested this. The message no longer shows.

I also hacked to return -EIO if sector ZERO is read, and
the "unable to read partition table" will show, (as well as 16
other messages complaining at other places). So I guess it is
test.

Thanks
Boaz

> ---
>  block/partitions/check.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/block/partitions/check.c b/block/partitions/check.c
> index 9ac1df7..16118d1 100644
> --- a/block/partitions/check.c
> +++ b/block/partitions/check.c
> @@ -184,12 +184,12 @@ check_partition(struct gendisk *hd, struct block_device *bdev)
>  	if (err)
>  	/* The partition is unrecognized. So report I/O errors if there were any */
>  		res = err;
> -	if (!res)
> -		strlcat(state->pp_buf, " unknown partition table\n", PAGE_SIZE);
> -	else if (warn_no_part)
> -		strlcat(state->pp_buf, " unable to read partition table\n", PAGE_SIZE);
> -
> -	printk(KERN_INFO "%s", state->pp_buf);
> +	if (res) {
> +		if (warn_no_part)
> +			strlcat(state->pp_buf,
> +				" unable to read partition table\n", PAGE_SIZE);
> +		printk(KERN_INFO "%s", state->pp_buf);
> +	}
>  
>  	free_page((unsigned long)state->pp_buf);
>  	free_partitions(state);
> 

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