Re: [linux-lvm] [PATCH 1/1] pvscan: wait for udevd

From: Christian Hesse <list@eworm.de>
To: Zdenek Kabelac <zkabelac@redhat.com>
Cc: Natalenko <oleksandr@redhat.com>,
	linux-lvm@e1890.dsca.akamaiedge.net, Oleksandr,
	David Teigland <teigland@redhat.com>,
	LVM general discussion and development <linux-lvm@redhat.com>,
	Martin Wilck <mwilck@suse.com>,
	Heming Zhao <heming.zhao@suse.com>
Subject: Re: [linux-lvm] [PATCH 1/1] pvscan: wait for udevd
Date: Mon, 22 Feb 2021 14:04:17 +0100	[thread overview]
Message-ID: <20210222140417.4f890bec@leda> (raw)
In-Reply-To: <bcb2eb82-46b3-8e6b-c9b6-56442b4f63a3@redhat.com>


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Zdenek Kabelac <zkabelac@redhat.com> on Mon, 2021/02/22 10:57:
> > I've gone through the various tasks that dmeventd is responsible for,
> > and I couldn't see anything that'd be strictly necessary during early
> > boot. I may be overlooking something of course. Couldn't the monitoring  
> 
> As said - during ramdisk boot - monitor shall not be used (AFAIK - dracut
> is supposed to use disabled monitoring in it's modified copy of lvm.conf
> within ramdisk)

I could not find anything in dracut that modifies lvm.conf, but looks like
dracut calls the lvm commands with `--ignoremonitoring`.

To date this is not handled in lvm2's mkinitcpio hook... Wondering if
that would help. Oleksandr, you could undo the udev workaround, then apply
the following diff to /usr/lib/initcpio/install/lvm2, regenerate the
initramfs and retry?

--- lvm2_install	(revision 408582)
+++ lvm2_install	(working copy)
@@ -34,6 +34,7 @@
     add_file "/usr/lib/udev/rules.d/95-dm-notify.rules"
     add_file "/usr/lib/initcpio/udev/11-dm-initramfs.rules" "/usr/lib/udev/rules.d/11-dm-initramfs.rules"
     add_file "/etc/lvm/lvm.conf"
+    sed -i '/^\smonitoring =/s/1/0/' "${BUILDROOT}/etc/lvm/lvm.conf"
 
     # this udev rule is specific for systemd and non-systemd systems
     if command -v add_systemd_unit >/dev/null; then
-- 
main(a){char*c=/*    Schoene Gruesse                         */"B?IJj;MEH"
"CX:;",b;for(a/*    Best regards             my address:    */=0;b=c[a++];)
putchar(b-1/(/*    Chris            cc -ox -xc - && ./x    */b/42*2-3)*42);}

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