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Tony Holdstock-Brown cbae4dd7bf Implement regulator in filesystem driver ... This commit refactors base.regulator into the 2.4 interfaces and adds a filesystem configuration option `maxthreads` to configure the regulator. By default `maxthreads` is set to 100. This means the FS driver is limited to 100 concurrent blocking file operations. Any subsequent operations will block in Go until previous filesystem operations complete. This ensures that the registry can never open thousands of simultaneous threads from os filesystem operations. Note that `maxthreads` can never be less than 25. Add test case covering parsable string maxthreads Signed-off-by: Tony Holdstock-Brown <tony@docker.com>		2016-05-03 09:33:22 -07:00
docs	Implement regulator in filesystem driver	2016-05-03 09:33:22 -07:00