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From: Zdenek Kabelac <zkabelac@redhat.com>
To: device-mapper development <dm-devel@redhat.com>
Subject: Re: [RFC] disk doesn't spin down with thin pool + dmeventd
Date: Fri, 8 Jan 2016 09:17:20 +0100	[thread overview]
Message-ID: <568F7090.4030908@redhat.com> (raw)
In-Reply-To: <568EBD08.70800@gmail.com>

Dne 7.1.2016 v 20:31 Alan Jenkins napsal(a):
> Hi
>
> I tried using Docker on my Fedora NAS box.  It created a thin pool LV, which
> caused hard drive activity every ~10 seconds.
>
> dmeventd queries the thin pool every 10 seconds, and it causes a transaction
> commit in order to make sure the statistics are up to date. But transactions
> are already supposed to be committed after 1 second. (See
> Documentation/device-mapper/thin-provisioning.txt, "Updating on-disk metadata").
>
> It seems like a simple case of "don't do that".  The kernel already lets us
> avoid the commit.  How about it (patch below)?  If it seems reasonable, I can
> whip up a commit message for it.
>

Hi

I believe it's already solved upstream in version 2.02.133
of lvm2 package with this commit:

81e9ab3156badecc6a64447708c4ae4886e3c244
Date: Thu Oct 22 12:36:25 2015 +0200

Which version of lvm2 are you using ?

Regards

Zdenek

  reply	other threads:[~2016-01-08  8:17 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-07 19:31 [RFC] disk doesn't spin down with thin pool + dmeventd Alan Jenkins
2016-01-08  8:17 ` Zdenek Kabelac [this message]
2016-01-09 10:07 ` Alan Jenkins
2016-01-09 11:51   ` Alan Jenkins
2016-01-11  9:21     ` Zdenek Kabelac

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