linux-kernel - Re: [PATCH] block: Fix LSF default inconsistency

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Message-ID: <20081211134438.6d871834@hyperion.delvare>
Date:	Thu, 11 Dec 2008 13:44:38 +0100
From:	Jean Delvare <khali@...ux-fr.org>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	Trond Myklebust <Trond.Myklebust@...app.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] block: Fix LSF default inconsistency

Hi Jens,

On Thu, 11 Dec 2008 12:08:39 +0100, Jens Axboe wrote:
> Anyway, how about something like this? Totally untested...
> 
> diff --git a/block/Kconfig b/block/Kconfig
> index 1ab7c15..ce566dd 100644
> --- a/block/Kconfig
> +++ b/block/Kconfig
> @@ -24,21 +24,18 @@ menuconfig BLOCK
>  if BLOCK
>  
>  config LBD
> -	bool "Support for Large Block Devices"
> +	bool "Support for Large Block Devices and files"
>  	depends on !64BIT
> +	select LSF

You can't select something...

>  	help
> -	  Enable block devices of size 2TB and larger.
> +	  Enable block devices or files of size 2TB and larger.
>  
>  	  This option is required to support the full capacity of large
>  	  (2TB+) block devices, including RAID, disk, Network Block Device,
>  	  Logical Volume Manager (LVM) and loopback.
> -
> -	  For example, RAID devices are frequently bigger than the capacity
> -	  of the largest individual hard drive.
> -
> -	  This option is not required if you have individual disk drives
> -	  which total 2TB+ and you are not aggregating the capacity into
> -	  a large block device (e.g. using RAID or LVM).
> +	
> +	  This option also enables support for single files larger than
> +	  2TB.
>  
>  	  If unsure, say N.
>  
> @@ -57,15 +54,6 @@ config BLK_DEV_IO_TRACE
>  
>  	  If unsure, say N.
>  
> -config LSF

... that no longer exists. You must either leave the config LSF as a
bool with no label and no help file, or drop it altogether and replace
all occurrences of CONFIG_LSF in the kernel source with CONFIG_LBD.

> -	bool "Support for Large Single Files"
> -	depends on !64BIT
> -	help
> -	  Say Y here if you want to be able to handle very large files (2TB
> -	  and larger), otherwise say N.
> -
> -	  If unsure, say Y.
> -
>  config BLK_DEV_BSG
>  	bool "Block layer SG support v4 (EXPERIMENTAL)"
>  	depends on EXPERIMENTAL
> 


-- 
Jean Delvare
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