[PATCH v2] epoll_create.2: HISTORYise "max_user_instances" EMFILE

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/proc/sys/fs/epoll/max_user_instances hasn't existed since 2009.

Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@xxxxxxxxxxxxxxxxxx>
---
I blindly copied the tag and didn't check, but even if I did,
'Linux v[0-9]' does return results, so I wouldn't've been dissuaded.

 man2/epoll_create.2 | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/man2/epoll_create.2 b/man2/epoll_create.2
index 4d3566a79..b51f5051e 100644
--- a/man2/epoll_create.2
+++ b/man2/epoll_create.2
@@ -83,14 +83,6 @@ .SH ERRORS
 .IR flags .
 .TP
 .B EMFILE
-The per-user limit on the number of epoll instances imposed by
-.I /proc/sys/fs/epoll/max_user_instances
-was encountered.
-See
-.BR epoll (7)
-for further details.
-.TP
-.B EMFILE
 The per-process limit on the number of open file descriptors has been reached.
 .TP
 .B ENFILE
@@ -134,6 +126,20 @@ .SH HISTORY
 in order to ensure backward compatibility when new
 .B epoll
 applications are run on older kernels.
+.PP
+Prior to Linux 2.6.29,
+.\" commit 9df04e1f25effde823a600e755b51475d438f56b
+.\" ("epoll: drop max_user_instances and rely only on max_user_watches")
+.\" Date:   Thu Jan 29 14:25:26 2009 -0800
+.\" v2.6.29-rc3-24-g9df04e1f25ef
+a
+.I /proc/sys/fs/epoll/max_user_instances
+sysctl limited live epolls for each real user ID,
+and caused
+.BR epoll_create ()
+to fail with
+.B EMFILE
+on overrun.
 .SH SEE ALSO
 .BR close (2),
 .BR epoll_ctl (2),
-- 
2.39.2

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