[Bug 1233281] Re: crashes on Ubuntu Touch due to /var/lib/ureadahead/ being read-only

[Stéphane Graber]

Note that the situation ogra describes above is actually handled usually
by making a writable-path entry that's (persistent + transition), the
only reason it doesn't appear to work here is because
/var/lib/ureadahead/debugfs isn't mounted by mountall so the mount point
resolution doesn't happen...

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https://bugs.launchpad.net/bugs/1233281

Title:
  crashes on Ubuntu Touch due to /var/lib/ureadahead/ being read-only

Status in “lxc-android-config” package in Ubuntu:
  Fix Released
Status in “system-image” package in Ubuntu:
  New
Status in “ureadahead” package in Ubuntu:
  New

Bug description:
  # tail /var/log/upstart/ureadahead.log
  ureadahead:.: Ignored relative path
  ureadahead:.: Ignored relative path
  ureadahead:.: Ignored relative path
  ureadahead:NetworkManager: Ignored relative path
  ureadahead:NetworkManager: Ignored relative path
  ureadahead:NetworkManager: Ignored relative path
  ureadahead:tracing_on: Ignored relative path
  ureadahead:events/fs/open_exec/enable: Ignored relative path
  ureadahead:events/fs/do_sys_open/enable: Ignored relative path
  ureadahead:pack.c:388: Unhandled error from write_pack: Read-only file system

  Although write_pack() is failing due to EROFS, trace() (which calls
  write_pack()) does not check for any raised errors, hence the crash.

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