From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <andi@firstfloor.org>
Subject: Re: [PATCH] Allow increasing the buffer-head per-CPU LRU size
Date: Sun, 06 Jul 2014 09:18:12 -0700
Message-ID: <87y4w6sbp7.fsf@tassilo.jf.intel.com>
References: <53B667F9.90306@bull.net>
Mime-Version: 1.0
Content-Type: text/plain
Cc: <viro@zeniv.linux.org.uk>, <linux-fsdevel@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>
To: Sebastien Buisson <sebastien.buisson@bull.net>
Return-path: <linux-kernel-owner@vger.kernel.org>
In-Reply-To: <53B667F9.90306@bull.net> (Sebastien Buisson's message of "Fri, 4
	Jul 2014 10:38:17 +0200")
Sender: linux-kernel-owner@vger.kernel.org
List-Id: linux-fsdevel.vger.kernel.org

Sebastien Buisson <sebastien.buisson@bull.net> writes:

> Allow increasing the buffer-head per-CPU LRU size to allow efficient
> filesystem operations that access many blocks for each transaction.
> For example, creating a file in a large ext4 directory with quota
> enabled will accesses multiple buffer heads and will overflow the LRU
> at the default 8-block LRU size:

I don't think that should be a user visible config. Most users wouldn't
know how to set it. And Linux already has far too many obscure
config options.

Either make it set implicitely by the file system config.
Or just increase it unconditionally? 

-Andi


-- 
ak@linux.intel.com -- Speaking for myself only