Use inotify instead of polling in Runner.py

[tsmetana]

Hi,
  the Mailman wakes up 7 times per second which is somehow resource unfriendly. This is caused by qrunners that poll for new files in queue directory. The proposed patch replaces polling in Runner.py with inotify which enables CPU to idle when possible.

The patch requires python-inotify (http://pyinotify.sourceforge.net) to be installed.
--ts

[bwarsaw (bwarsaw)]

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IIUC, inotify is a Linux-only thing so this would have to be optional. I haven't looked at the patch, but I would target this for Mailman 3 instead of 2.2.

[tsmetana (tsmetana)]

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Yes, you're right... I didn't realize that inotify is Linux specific. I will add a configure script option -- this should solve the Linux-only problem and make the python-inotify dependency optional. Also I will take a look at Mailman 3 and try to create a patch for it as well.

[tsmetana (tsmetana)]

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File Added: mailman-inotify.patch

[tsmetana (tsmetana)]

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I'm adding updated patch for Mailman 2.2 and a new patch for Mailman 3. I've moved the python-inotify parts in conditionals, so if inotify is not present in the system, everything should work as in the unpatched version.
File Added: mailman3-inotify.patch

[tsmetana (tsmetana)]

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The patches will make Mailman working but unstoppable. It looks to be a python's problem with handling signals in threads. I'm closing this ticket until the issues got solved.

[tsmetana (tsmetana)]

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Reopening: I have prepared new patches that were tested with Mailman 2 and look to be OK. Please consider incorporating the patches.
File Added: mailman3-inotify.patch

[tsmetana (tsmetana)]

The file mailman3-inotify.patch was added: New patch for Mailman 3

[tsmetana (tsmetana)]

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File Added: mailman-inotify.patch

[tsmetana (tsmetana)]

The file mailman-inotify.patch was added: New patch for Mailman 2