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authorOleg Nesterov <oleg@tv-sign.ru>2007-10-16 23:26:49 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 08:42:51 -0700
commit84eb646b6eabcd82ec563f30d2d9d40c2054a9c9 (patch)
tree96219c5844c80c40cbc9814a13a9a72de7430fc7 /drivers
parent8e9073ed027771bcdee4033eb900a3c09ac90a19 (diff)
handle the multi-threaded init's exit() properly
With or without this patch, multi-threaded init's are not fully supported, but do_exit() is completely wrong. This becomes a real problem when we support pid namespaces. 1. do_exit() panics when the main thread of /sbin/init exits. It should not until the whole thread group exits. Move the code below, under the "if (group_dead)" check. Note: this means that forget_original_parent() can use an already dead child_reaper()'s task_struct. This is OK for /sbin/init because - do_wait() from alive sub-thread still can reap a zombie, we iterate over all sub-thread's ->children lists - do_notify_parent() will wakeup some alive sub-thread because it sends the group-wide signal However, we should remove choose_new_parent()->BUG_ON(reaper->exit_state) for this. 2. We are playing games with ->nsproxy->pid_ns. This code is bogus today, and it has to be changed anyway when we really support pid namespaces, just remove it. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Roland McGrath <roland@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com> Cc: Serge Hallyn <serue@us.ibm.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
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