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epoll_wait.2: Clarify the behavior when epoll_wait()-ing on an empty interest list 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2018-06-22 10:27:52 +02:00
parent a3961b2fd5
commit e3a60d1ce2
1 changed files with 8 additions and 5 deletions
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13
man2/epoll_wait.2
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@ -217,12 +217,15 @@ it will cause the
.BR epoll_wait ()
call to unblock.
.PP
For a discussion of what may happen if a file descriptor in an
.B epoll
instance being monitored by
Note that it is possible to call
.BR epoll_wait ()
is closed in another thread, see
.BR select (2).
on an
.B epoll
instance whose interest list is currently empty
(or whose interest list becomes empty because file descriptors are closed
or removed from the interest in another thread).
The call will block until some file descriptor is later added to the
interest list (in another thread) and that file descriptor becomes ready.
.SH BUGS
In kernels before 2.6.37, a
.I timeout