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From: Alasdair G Kergon <agk@redhat.com>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] unable to exclude LVs using global_filter
Date: Tue, 2 Jan 2018 18:43:34 +0000	[thread overview]
Message-ID: <20180102184334.GA22713@agk-dp.fab.redhat.com> (raw)
In-Reply-To: <d5495aca-c9db-099a-13f2-f602df311a7f@redhat.com>

The key concept to grasp is that LVM works with devices (i.e. major
number + minor number pairs) rather than filesystem paths and it makes a
single "use or ignore" decision for each device (not for each path).

One device might be reachable through more than one filesystem path that
lvm has been configured to check and, if so, all the paths are checked
against the filter independently and the results feed into that single
decision according to the rules described.

Alasdair

  reply	other threads:[~2018-01-02 18:43 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-02  6:47 [linux-lvm] unable to exclude LVs using global_filter Gordon Messmer
2018-01-02 11:03 ` Marian Csontos
2018-01-02 15:35   ` Gordon Messmer
2018-01-02 18:17     ` Marian Csontos
2018-01-02 18:43       ` Alasdair G Kergon [this message]
2018-01-02 18:47         ` Alasdair G Kergon
2018-01-02 19:16         ` Gordon Messmer
2018-01-03 21:18           ` Gordon Messmer
2018-01-11  4:51             ` Gordon Messmer
2018-01-02 18:58       ` Gordon Messmer

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