Commits on Jun 26, 2020

1. live-generator: Add Options=ro to our mounts …

   The default is a writable mount, and right now the
   kernel emits a warning when the mount succeeds
   because the underlying block device is read-only.
   
   Which...actually turns out to *also* be the cause behind
   the races we've been seeing mounting the ISO
   coreos/fedora-coreos-tracker#523
   
   I believe what's happening is one of the bits of udev
   is probing the ISO and doing a read-only mount at the same time we're
   trying to mount it.
   
   From the kernel perspective it's fine to have multiple concurrent
   read-only mounts, but because ours was requested as writable,
   if we happend to be trying to do our mount at the same time
   as the probing the kernel will reject it.

   

   cgwalters committed Jun 26, 2020
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