[linux-lvm] LVM2 lockup while snapshotting root
Bill Rugolsky Jr.
brugolsky at telemetry-investments.com
Tue Oct 12 21:03:31 UTC 2004
On Tue, Oct 12, 2004 at 12:58:53PM -0700, Eric Hopper wrote:
> First, it could be updates to /etc/lvm while the filesystem is
> suspended. This shouldn't be done at all. First, a journal of what the
> planned change is should be written to /etc/lvm, the filesystem
> suspended, the change made, the filesystem unsuspended, then a marker
> indicating that the change succeeded to /etc/lvm.
Sounds like a good starting point. Other interesting cases are swap on
LVM, and rolling back the root fs to a snapshot.
> Second, it could be the fact that the LVM executable is demand paged.
> It could be that a page of the executable is read in while the
> filesystem is suspended. This is trickier to solve, and having the
> problem is much more excusable than the first.
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