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Date: Sun, 13 Oct 2002 12:47:56 +0100 (BST)
From: Hugh Dickins <hugh@veritas.com>
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To: Andi Kleen <ak@suse.de>
cc: "David S. Miller" <davem@redhat.com>, <wagnerjd@prodigy.net>,
       <robm@fastmail.fm>, <hahn@physics.mcmaster.ca>,
       <linux-kernel@vger.kernel.org>, <jhoward@fastmail.fm>
Subject: Re: Strange load spikes on 2.4.19 kernel
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On 13 Oct 2002, Andi Kleen wrote:
> 
> Still in 2.4 the VFS takes the big kernel lock unnecessarily for
> a few VFS operations (no matter if the underlying FS needs it or not).
> That's fixed in 2.5.

Something I was a bit surprised to notice recently: 2.5 still holds
big kernel lock around the potentially very lengthy vmtruncate() -
is that one still really necessary at VFS level?

Hugh

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