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Date: Thu, 26 May 2005 21:29:36 +0200
From: bill.mair@t-online.de
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Subject: [linux-lvm] Re: Daemon or Thread with 5 minute interval
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To: LVM general discussion and development <linux-lvm@redhat.com>

Howard Rifkin wrote:

 >> So, my question is does anyone know of a
 >> kernel thread or daemon in the 2.4 kernel that wakes up every 5 minutes?
 >
 >[kupdated] can cause massive CPU load if your kernel does not have the IDE 
 >chipset support for your system. I think it flushed any data in the HD
 >buffers to disk and if the chipset support isn't there, then the main CPU has
 >to do this using PIO.
 >
 >--
 >Bill


** In addition to my post I might add that kswapd and bdflushd also deal with
IDE drives.

**  Correcting my initial reply, kupdated deals with "journal" flushing to the
HD, which may also be relevant on your cluster.

--
Bill