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| author |   Oleg Nesterov <oleg@redhat.com> | 2014-04-07 15:38:46 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-07 16:36:06 -0700 |
| commit | ad86622b478eaafdc25b74237df82b10fce6326d (patch) | |
| tree | 5cec0d87c13edce3c73a087903801492362310cd /fs/proc/array.c | |
| parent | wait: completely ignore the EXIT_DEAD tasks (diff) | |
| download | linux-dev-ad86622b478eaafdc25b74237df82b10fce6326d.tar.xz linux-dev-ad86622b478eaafdc25b74237df82b10fce6326d.zip | |
wait: swap EXIT_ZOMBIE and EXIT_DEAD to hide EXIT_TRACE from user-space
get_task_state() uses the most significant bit to report the state to
user-space, this means that EXIT_ZOMBIE->EXIT_TRACE->EXIT_DEAD transition
can be noticed via /proc as Z -> X -> Z change. Note that this was
possible even before EXIT_TRACE was introduced.
This is not really bad but imho it make sense to hide EXIT_TRACE from
user-space completely. So the patch simply swaps EXIT_ZOMBIE and
EXIT_DEAD, this way EXIT_TRACE will be seen as EXIT_ZOMBIE by user-space.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: Michal Schmidt <mschmidt@redhat.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Lennart Poettering <lpoetter@redhat.com>
Cc: Roland McGrath <roland@hack.frob.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc/array.c')
| -rw-r--r-- | fs/proc/array.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c index 656e401794de..64db2bceac59 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -138,8 +138,8 @@ static const char * const task_state_array[] = { "D (disk sleep)", /* 2 */ "T (stopped)", /* 4 */ "t (tracing stop)", /* 8 */ - "Z (zombie)", /* 16 */ - "X (dead)", /* 32 */ + "X (dead)", /* 16 */ + "Z (zombie)", /* 32 */ }; static inline const char *get_task_state(struct task_struct *tsk) |