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| author |   Oleg Nesterov <oleg@redhat.com> | 2014-04-07 15:38:43 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-07 16:36:05 -0700 |
| commit | b436069059fede30ca31d4bf439cc86436ff5b1d (patch) | |
| tree | d5d6875cdd317445cb1e84883b5a078bf8cf1451 /fs/proc/array.c | |
| parent | wait: introduce EXIT_TRACE to avoid the racy EXIT_DEAD->EXIT_ZOMBIE transition (diff) | |
| download | wireguard-linux-b436069059fede30ca31d4bf439cc86436ff5b1d.tar.xz wireguard-linux-b436069059fede30ca31d4bf439cc86436ff5b1d.zip | |
wait: use EXIT_TRACE only if thread_group_leader(zombie)
wait_task_zombie() always uses EXIT_TRACE/ptrace_unlink() if
ptrace_reparented(). This is suboptimal and a bit confusing: we do not
need do_notify_parent(p) if !thread_group_leader(p) and in this case we
also do not need ptrace_unlink(), we can rely on ptrace_release_task().
Change wait_task_zombie() to check thread_group_leader() along with
ptrace_reparented() and simplify the final p->exit_state transition.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Tested-by: Michal Schmidt <mschmidt@redhat.com>
Cc: Jan Kratochvil <jan.kratochvil@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')
0 files changed, 0 insertions, 0 deletions