[PATCH] proc: document CoreDumping flag in /proc/<pid>/status

[Roman Gushchin]

Add description for the CoreDumping flag in /proc/<pid>/status.

The flag is intended to be used to avoid killing processes
during the generation of the coredump files and avoid getting
corrupted coredump files.

Signed-off-by: Roman Gushchin <guro@xxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: kernel-team@xxxxxx
Cc: linux-doc@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
 Documentation/filesystems/proc.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index adba21b5ada7..bc832f8b7a70 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -181,6 +181,7 @@ read the file /proc/PID/status:
   VmPTE:        20 kb
   VmSwap:        0 kB
   HugetlbPages:          0 kB
+  CoreDumping:    0
   Threads:        1
   SigQ:   0/28578
   SigPnd: 0000000000000000
@@ -254,6 +255,8 @@ Table 1-2: Contents of the status files (as of 4.8)
  VmSwap                      amount of swap used by anonymous private data
                              (shmem swap usage is not included)
  HugetlbPages                size of hugetlb memory portions
+ CoreDumping                 process's memory is currently being dumped
+                             (killing the process may lead to a corrupted core)
  Threads                     number of threads
  SigQ                        number of signals queued/max. number for queue
  SigPnd                      bitmap of pending signals for the thread
-- 
2.13.5