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Date: Mon, 19 May 2008 00:29:19 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: "Dave Young" <hidave.darkstar@gmail.com>
Cc: "kernel list" <linux-kernel@vger.kernel.org>
Subject: Re: [2.6.26-rc2-mm1] sync to speed up?
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On Mon, 19 May 2008 15:15:09 +0800 "Dave Young" <hidave.darkstar@gmail.com> wrote:

> Hi,
> 
> With 2.6.26-rc2-mm1 I need to sync frequently. It's not normal as my
> understanding.
> 
> 1. scp a big file from a lan server. Firstly the speed is about 8M/s,
> but the speed will slow down to 100K/s at last. After I exec "sync",
> the speed will restore.
> 
> Is this a known issue?
> 

Yes, probably related to the "mkfs takes forever" problem.  I haven't
looked into it yet.  Nor has anyone else afaik.