[Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
*** This bug is a duplicate of bug 1396213 *** https://bugs.launchpad.net/bugs/1396213 ** This bug is no longer a duplicate of bug 995645 udevd: timeout: killing 'watershed sh -c '/sbin/lvm vgscan; /sbin/lvm vgchange -a y'' ** This bug has been marked a duplicate of bug 1396213 LVM VG is not activated during system boot -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
*** This bug is a duplicate of bug 995645 *** https://bugs.launchpad.net/bugs/995645 It has the symptom of both bugs, 1. a lvm root volume with snapshot that doesn't boot the OS, and 2. at boot time it stalls, show "timeout: killing 'watershed... lvm vgscan..." and drop to shell. After I removed the root snapshot it didn't show "killing watershed" and OS booted up fine. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
*** This bug is a duplicate of bug 995645 *** https://bugs.launchpad.net/bugs/995645 On Fri, Apr 11, 2014 at 06:55:15PM -, Seth wrote: > I'd like to have the record show that this bug is ancient so we can > measure the level of neglect. Snapshot loading got speeded up in upstream kernel 3.14. Alasdair -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
*** This bug is a duplicate of bug 995645 *** https://bugs.launchpad.net/bugs/995645 @Anderson The fact that "it's happening here" doesn't make this a dupe. In fact, it makes /that/ a dupe of this one, ~3 years OLDER. I'd like to have the record show that this bug is ancient so we can measure the level of neglect. $0.02 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
*** This bug is a duplicate of bug 995645 *** https://bugs.launchpad.net/bugs/995645 A lvm root volume snapshot that has many changes takes too long to activate (lvchange -ay volume). At boot time it doesnt wait and kill process "watershed sh -c '/sbin/lvm vgscan; /sbin/lvm vgchange -a y'", then it won't boot because it didn't activate the boot volume. Its happening here, with volume vg0/trusty and snapshot vg0/trusty_snap. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
*** This bug is a duplicate of bug 995645 *** https://bugs.launchpad.net/bugs/995645 @Anderson Luiz Alves: Are you sure this bug is an exact duplicate of #995645? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
*** This bug is a duplicate of bug 995645 *** https://bugs.launchpad.net/bugs/995645 ** This bug has been marked a duplicate of bug 995645 udevd: timeout: killing 'watershed sh -c '/sbin/lvm vgscan; /sbin/lvm vgchange -a y'' -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
Forgot about the problem when I upgraded to Precise 12.04 from oneiric. I have root on lvm and I took a snapshot before upgrade. Everthing worked fine for couple of boots and after _one_ day of using the machine My system timedout on watersched vgchange -a y, but the lvm volume was availeble in initrd shell. Removing the snapshot made my system bootable again. A workaround for this problem whould be appreciated. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
I just reproduced this on a remote server, I had a "natty" snapshot (am now on 11.10). After deleting the snapshot system booted just fine. This effectively kills the snapshot function for the rootfs. Took me a few hours to get a remote console and figure this one out. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
Metadata (not data) is cached i.e. the block mappings -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
Persistent on disk, but cached completely in memory by reading the entire COW device when activating it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
On 01/07/2012 08:08 PM, Ray Van Dolson wrote: > I believe this is normal behavior for LVM. LVM has to build an overlay > layer from all of the blocks contained in the snapshot so they are > available via access to the "parent" LV at any time. > > The larger the snapshot, the longer it takes to read in all of the > blocks and build the overlay layer. does that imply that the overlay / COW bitmap is in-memory only? I don't get that fully, because without persistent information, it couldn't be reconstructed on reboot. So, the real problem is the absense of lazy initialization of the overlay layer Also, even if this was by design, in my mind it wouldbe broken by design. Read the issue, you'll notice that this will prohibit use of LVM2 snapshots on many systems. Just my $0.02 Seth -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
I believe this is normal behavior for LVM. LVM has to build an overlay layer from all of the blocks contained in the snapshot so they are available via access to the "parent" LV at any time. The larger the snapshot, the longer it takes to read in all of the blocks and build the overlay layer. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
I'm experiencing the same thing. With a full snapshot and a disabled splash screen, I get an error message telling me that a command has timeouted (lvscan, IIRC), and it had been terminated. I removed the snapshot and it booted all right. I think terminating boot commands using a predefined timeout is a double-edged sword - it does help if a program trying to access an unessential resource has hanged, but it does prevent boots on slow systems - examples would include lvm snapshots which slow the boot process quite a lot, and failing hardware. I've had the same issue when I was trying to boot from a hard drive that was failing. The boot never succeeded because initrd decided to kill everything. Wouldn't it make more sense if a more intelligent approach is used? E.g. run the tools in parallel repeatedly until the root is found, or re-run the killed ones if the root wasn't found or something? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: lvm2 (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot To manage notifications about this bug go to: https://bugs.launchpad.net/lvm2/+bug/360237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
I've run into this still with Ubuntu 10.04. The issue is exactly as described, where lvchange -a y takes significant time to run, causing the boot to fail. In my case, I had a 200G allocated snapshot against a 2TB LV, with about 40% in use. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360237 Title: cannot boot root on lvm2 with (largish) snapshot -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
I've seen this exact behavior on two different sets of hardware. Both running LVM on top of RAID-1. I've seen it happen in both intrepid and jaunty -- cannot boot root on lvm2 with (largish) snapshot https://bugs.launchpad.net/bugs/360237 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 360237] Re: cannot boot root on lvm2 with (largish) snapshot
Ubuntu bugs should generally be filed on the appropriate package in Ubuntu rather than on the upstream project. Moving the bug to Ubuntu's lvm2 package. ** Also affects: lvm2 (Ubuntu) Importance: Undecided Status: New ** Changed in: lvm2 Status: New => Invalid -- cannot boot root on lvm2 with (largish) snapshot https://bugs.launchpad.net/bugs/360237 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
