From bca7fbb53ad341f1a2d7c105ee8b308ff1b62993 Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Fri, 25 Jan 2019 09:08:57 +1300
Subject: [PATCH] proc.5: Since Linux 4.5, "stack:" is no longer shown in
 /proc/PID/maps

Reported-by: Nick Gregory <ghost@capsule8.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---
 man5/proc.5 | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/man5/proc.5 b/man5/proc.5
index 6bb82a69b..5d626d5a9 100644
--- a/man5/proc.5
+++ b/man5/proc.5
@@ -1324,14 +1324,17 @@ There are additional helpful pseudo-paths:
 .IR [stack]
 The initial process's (also known as the main thread's) stack.
 .TP
-.IR [stack:<tid>] " (since Linux 3.4)"
-.\" commit b76437579d1344b612cf1851ae610c636cec7db0
+.IR [stack:<tid>] " (from Linux 3.4 to 4.4)"
+.\" commit b76437579d1344b612cf1851ae610c636cec7db0 (added)
+.\" commit 65376df582174ffcec9e6471bf5b0dd79ba05e4a (removed)
 A thread's stack (where the
 .IR <tid>
 is a thread ID).
 It corresponds to the
 .IR /proc/[pid]/task/[tid]/
 path.
+This field was removed in Linux 4.5, since providing this information
+for a process with large numbers of threads is expensive.
 .TP
 .IR [vdso]
 The virtual dynamically linked shared object.