Rev 1520: [merge] Hold locks around diff to prevent thrashing stat-cache (Denys) in /home/mbp/work/bzr.dev/

[Martin Pool]

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revno: 1520
revision-id: mbp at sourcefrog.net-20060113074531-d62e6798c2dc5ebc
parent: mbp at sourcefrog.net-20060113063142-8e706dc1483c69e1
parent: denys.duchier at mozart-oz.org-20060112160312-2ef168ffc0964c11
committer: Martin Pool <mbp at sourcefrog.net>
branch nick: bzr.dev (Main development branch)
timestamp: Fri 2006-01-13 18:45:31 +1100
message:
  [merge] Hold locks around diff to prevent thrashing stat-cache (Denys)
modified:
  bzrlib/delta.py                delta.py-20050729221636-54cf14ef94783d0a
  bzrlib/diff.py                 diff.py-20050309040759-26944fbbf2ebbf36
  bzrlib/tree.py                 tree.py-20050309040759-9d5f2496be663e77
    ------------------------------------------------------------
    merged: denys.duchier at mozart-oz.org-20060112160312-2ef168ffc0964c11
    parent: denys.duchier at mozart-oz.org-20060112140407-8fcdee0baca6d707
    committer: Denys Duchier <denys.duchier at mozart-oz.org>
    branch nick: bzr.diff
    timestamp: Thu 2006-01-12 17:03:12 +0100
    message:
      removed the lock_write method for read-only trees
    ------------------------------------------------------------
    merged: denys.duchier at mozart-oz.org-20060112140407-8fcdee0baca6d707
    parent: mbp at sourcefrog.net-20060112063723-4ec91b5ff30f0830
    committer: Denys Duchier <denys.duchier at mozart-oz.org>
    branch nick: bzr.dev (Main development branch)
    timestamp: Thu 2006-01-12 15:04:07 +0100
    message:
      lock operations for trees - use them for diff