]> git.proxmox.com Git - mirror_ubuntu-focal-kernel.git/commit
wait: use EXIT_TRACE only if thread_group_leader(zombie)
authorOleg Nesterov <oleg@redhat.com>
Mon, 7 Apr 2014 22:38:43 +0000 (15:38 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Mon, 7 Apr 2014 23:36:05 +0000 (16:36 -0700)
commitb436069059fede30ca31d4bf439cc86436ff5b1d
treed5d6875cdd317445cb1e84883b5a078bf8cf1451
parentabd50b39e783e1b6c75c7534c37f1eb2d94a89cd
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>
kernel/exit.c