From mboxrd@z Thu Jan  1 00:00:00 1970
From: Namhyung Kim <namhyung@gmail.com>
Subject: Re: [PATCH 2/8] readahead: make default readahead size a kernel parameter
Date: Mon, 21 Nov 2011 22:16:21 +0900
Message-ID: <8762id7h0a.fsf@gmail.com>
References: <20111121091819.394895091@intel.com>
	<20111121093846.251104145@intel.com>
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Cc: Andrew Morton <akpm@linux-foundation.org>,  Linux Memory Management List <linux-mm@kvack.org>,  <linux-fsdevel@vger.kernel.org>,  Ankit Jain <radical@gmail.com>,  Dave Chinner <david@fromorbit.com>,  Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>,  Rik van Riel <riel@redhat.com>,  Nikanth Karthikesan <knikanth@suse.de>
To: Wu Fengguang <fengguang.wu@intel.com>
Return-path: <owner-linux-mm@kvack.org>
In-Reply-To: <20111121093846.251104145@intel.com> (Wu Fengguang's message of
	"Mon, 21 Nov 2011 17:18:21 +0800")
Sender: owner-linux-mm@kvack.org
List-Id: linux-fsdevel.vger.kernel.org

Wu Fengguang <fengguang.wu@intel.com> writes:

> From: Nikanth Karthikesan <knikanth@suse.de>
>
> Add new kernel parameter "readahead=", which allows user to override
> the static VM_MAX_READAHEAD=128kb.
>
> CC: Ankit Jain <radical@gmail.com>
> CC: Dave Chinner <david@fromorbit.com>
> CC: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
> Acked-by: Rik van Riel <riel@redhat.com>
> Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
> ---
>  Documentation/kernel-parameters.txt |    6 ++++++
>  block/blk-core.c                    |    3 +--
>  fs/fuse/inode.c                     |    2 +-
>  mm/readahead.c                      |   19 +++++++++++++++++++
>  4 files changed, 27 insertions(+), 3 deletions(-)
>
> --- linux-next.orig/Documentation/kernel-parameters.txt	2011-10-19 11:11:14.000000000 +0800
> +++ linux-next/Documentation/kernel-parameters.txt	2011-11-20 11:09:56.000000000 +0800
> @@ -2245,6 +2245,12 @@ bytes respectively. Such letter suffixes
>  			Run specified binary instead of /init from the ramdisk,
>  			used for early userspace startup. See initrd.
>  
> +	readahead=nn[KM]
> +			Default max readahead size for block devices.
> +
> +			This default max readahead size may be overrode

s/overrode/overridden/ ?

Thanks.


> +			in some cases, notably NFS, btrfs and software RAID.
> +
>  	reboot=		[BUGS=X86-32,BUGS=ARM,BUGS=IA-64] Rebooting mode
>  			Format: <reboot_mode>[,<reboot_mode2>[,...]]
>  			See arch/*/kernel/reboot.c or arch/*/kernel/process.c

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