From: Pierre Habouzit <pierre.habouzit@intersec.com>
Date: Sun, 15 Jan 2012 09:31:44 +0000 (+0100)
Subject: implement poll and read
X-Git-Url: http://git.madism.org/?p=~madcoder%2Fpwqr.git;a=commitdiff_plain;h=866e56c8f10d718c24e812335b107a05218dc339;hp=866e56c8f10d718c24e812335b107a05218dc339

implement poll and read

No matter if we implement some other kind of dirty notification mechanism,
it feels right to have pwqr pollable for overcommit.

Documentation:
- drop the "in kernel unpark" method, it sucks
- migrate to using non blocking "read" for the probing method.
- document the pollability and how read works in the pwqr_create "manpage".

lib:
- implement epoll_create with flags. It requires a kernel supporting
  O_NONBLOCK/O_CLOEXEC flags to open(), I've been too lazy to implement
  the emulation yet.

Signed-off-by: Pierre Habouzit <pierre.habouzit@intersec.com>
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