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From Bryan McQuade <>
Subject clogging filters and async MPMs
Date Thu, 04 Feb 2010 14:14:41 GMT

I'm reading through the httpd code and I notice that async MPMs will fall
back to sync mode in the presence of clogging input filters (at least I
think I've got that right).

I understand that mod_ssl is a clogging filter.

What does it mean to be a "clogging filter"? How does this break async MPMs?
What would it take to make mod_ssl a non-clogging filter?


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