linux-kernel - Re: [PATCH] Allow increasing the buffer-head per-CPU LRU size

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Message-ID: <87y4w6sbp7.fsf@tassilo.jf.intel.com>
Date:	Sun, 06 Jul 2014 09:18:12 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Sebastien Buisson <sebastien.buisson@...l.net>
Cc:	<viro@...iv.linux.org.uk>, <linux-fsdevel@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Allow increasing the buffer-head per-CPU LRU size

Sebastien Buisson <sebastien.buisson@...l.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@...ux.intel.com -- Speaking for myself only
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