From: Alistair John Strachan <s0348365@sms.ed.ac.uk>
To: Paul Slootman <paul+nospam@wurtel.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: idle RAID1 cpu usage
Date: Wed, 27 Dec 2006 19:49:50 +0000 [thread overview]
Message-ID: <200612271949.50723.s0348365@sms.ed.ac.uk> (raw)
In-Reply-To: <20061227180900.GA10373@msgid.wurtel.net>
On Wednesday 27 December 2006 18:09, Paul Slootman wrote:
[snip]
> My question is: why is CPU being used by the RAID1 threads, even for
> those devices that are otherwise unused? What are they doing?
> I even started distributed-net to check that it wasn't just idle CPU
> cycles that were being used :-)
>
> Note: it did seem that the activity was a bit more during the first
> day after booting; in fact, the mdX_raid1 threads together had used
> about one hour's worth of CPU in the first 24 hours, i.e. 4% CPU
> (according to ps and top).
Sounds like a bug to me. My box is x86_64, but it's been up for 2 days and one
unmounted md_raid5 has used 0 minutes, 0 seconds of CPU, which is what I'd
expect.
Maybe it's some sort of accounting problem on SPARC?
--
Cheers,
Alistair.
Final year Computer Science undergraduate.
1F2 55 South Clerk Street, Edinburgh, UK.
prev parent reply other threads:[~2006-12-27 19:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-27 18:09 Paul Slootman
2006-12-27 18:18 ` Jan Engelhardt
2006-12-27 19:44 ` Paul Slootman
2006-12-27 19:49 ` Alistair John Strachan [this message]
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