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Committer: Canonical.com Patch Queue Manager
Date: 2010-01-29 16:20:18 UTC
mfrom: (4797.7.1 bug-514090)
mto: (4797.10.1 2.1) (4996.2.1 integration) (4999.1.1 integration) (5016.1.1 integration) (5031.1.2 merge-2.1-into-devel) (5036.1.1 integration) (4763.2.4 jam-integration) (5053.1.1 integration) (5068.1.1 integration) (5074.1.1 integration) (5080.2.1 merge-2.1-into-devel) (5110.1.1 integration) (5050.4.1 2.2) (5159.1.1 integration) (5197.1.1 merge-2.1-into-devel) (5241.2.1 trunk) (5258.1.1 diff-header-encoding) (5244.1.1 trunk) (5263.1.1 trunk) (5297.1.1 integration) (5609.33.5 2.3) (6015.55.2 2.4-feature-flags)
mto: This revision was merged to the branch mainline in revision 4998.
Revision ID: pqm@pqm.ubuntu.com-20100129162018-0a1o6pjjpky5zwql

(robertc) Fix threaded access to chk_map functions corrupting a
module level cache. (Robert Collins, John Arbash Meinel, bug 514090)

added added

removed removed

.. contents:: List of Releases

:depth: 1

bzr 2.1.0 (not released yet)

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:Codename:

:2.1.0:

Bug Fixes

*********

* Using the ``bzrlib.chk_map`` module from within multiple threads at the

same time was broken due to race conditions with a module level page

cache. This shows up as a KeyError in the ``bzrlib.lru_cache`` code with

``bzrlib.chk_map`` in the backtrace, and can be triggered without using

the same high level objects such as ``bzrlib.repository.Repository``

from different threads. chk_map now uses a thread local cache which may

increase memory pressure on processes using threads.

(Robert Collins, John Arbash Meinel, #514090)

bzr 2.1.0rc2

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