[apparmor] [Bug 903579] Re: AppArmor change_hat slow when lots of hats are loaded

[John Johansen]

One potential improvement is when shared policy load finally gets
implemented.  All hats in a shared group could be scanned simitaneously
using the dfa, resulting in a linear to input (hat name) cost lookup for
the group.  This would result in each group having a linear lookup cost.

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https://bugs.launchpad.net/bugs/903579

Title:
  AppArmor change_hat slow when lots of hats are loaded

Status in AppArmor Linux application security framework:
  New

Bug description:
  The apparmor change_hat api uses a linear scan of all hats loaded.
  Which causes it to slow down as the list gets longer.  This should be
  transitioned to a better data structure to make the match faster.

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