[Bug 1643838] Re: ureadahead trying to read entire filesystem

[Ryan Harper]

curtin does not do any read-ahead configuration;

** Changed in: curtin
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1643838

Title:
  ureadahead trying to read entire filesystem

Status in MAAS:
  Invalid
Status in ureadahead package in Ubuntu:
  New

Bug description:
  MAAS Version 2.1.1+bzr5544-0ubuntu1 (16.04.1), deploying Ubuntu
  16.04.1

  
  As shown in bug 1635560 and specifically in https://pastebin.canonical.com/171385/ during deployment, ureadahead (sometimes?) tries to index the whole filesystem, complaining about all of the relative paths.

  These are the log messages immediately before the spamminess:

  Nov 22 08:32:32 faraday systemd[1]: Starting Stop ureadahead data collection...
  Nov 22 08:32:32 faraday systemd[1]: Stopping Read required files in advance...
  Nov 22 08:32:32 faraday systemd[1]: Started Stop ureadahead data collection.

  The ureadahead lines are responsible for the vast majority of the
  installation log

  ⟫ cat faraday-installation-log | wc -l
  78777
  ⟫ grep ureadahead faraday-installation-log | wc -l
  76799

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