From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 6 Sep 2019 09:03:51 -0500 From: David Teigland Message-ID: <20190906140351.GB652@redhat.com> References: <20190829143759.GA22659@redhat.com> <9280276f-8601-cfbc-db46-1dcb28f92229@suse.com> <20190903151705.GA30692@redhat.com> <370ba3fa-53df-7213-8876-d37ef1a3b57e@suse.com> <20190905165519.GB30473@redhat.com> <8b432efdabc3de82146ea6cb87b27c89556bf72e.camel@suse.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <8b432efdabc3de82146ea6cb87b27c89556bf72e.camel@suse.de> Subject: Re: [linux-lvm] system boot time regression when using lvm2-2.03.05 Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Martin Wilck Cc: Heming Zhao , LVM general discussion and development On Fri, Sep 06, 2019 at 08:51:47AM +0200, Martin Wilck wrote: > IIUC this would mean that you skip David's "pvs_online" file generation > entirely. How did the auto-activation happen, then? I'd like to know which services/commands are activating the LVs. In the slow case it was clearly done by the lvm2-pvscan services, but in the fast case it looked like it was not. > Could it be that lvm2-activation-net.service activated the VGs? I can > imagine that that would be efficient, because when this service runs > late in the boot process, I'd expect all PVs to be online, so > everything can be activated in a single big swoop. Unfortunately, this > wouldn't work in general, as it would be too late for booting from LVM > volumes. > > However I thought all lvm2-acticvation... services were gone with LVM > 2.03? They still exist. In lvm 2.03, the lvm.conf event_activation setting controls whether activation is event-based via lvm2-pvscan services, or done by lvm2-activation services at fixed points during startup. LVM commands in initramfs could also be interfering and activating more than the root LV.