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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2006-03-28 16:11:25 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-28 18:36:44 -0800 |
| commit | 47e65328a7b1cdfc4e3102e50d60faf94ebba7d3 (patch) | |
| tree | 78e00a5321cca87767806a91e623e71b5c6637c7 /include/linux/pid.h | |
| parent | 88531f725bd52e37a7be726860e4ff3f09031d89 (diff) | |
| download | lwn-47e65328a7b1cdfc4e3102e50d60faf94ebba7d3.tar.gz lwn-47e65328a7b1cdfc4e3102e50d60faf94ebba7d3.zip | |
[PATCH] pids: kill PIDTYPE_TGID
This patch kills PIDTYPE_TGID pid_type thus saving one hash table in
kernel/pid.c and speeding up subthreads create/destroy a bit. It is also a
preparation for the further tref/pids rework.
This patch adds 'struct list_head thread_group' to 'struct task_struct'
instead.
We don't detach group leader from PIDTYPE_PID namespace until another
thread inherits it's ->pid == ->tgid, so we are safe wrt premature
free_pidmap(->tgid) call.
Currently there are no users of find_task_by_pid_type(PIDTYPE_TGID).
Should the need arise, we can use find_task_by_pid()->group_leader.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-By: Eric Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/pid.h')
| -rw-r--r-- | include/linux/pid.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/pid.h b/include/linux/pid.h index 099e70ecf7c7..5b9082cc600f 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -4,7 +4,6 @@ enum pid_type { PIDTYPE_PID, - PIDTYPE_TGID, PIDTYPE_PGID, PIDTYPE_SID, PIDTYPE_MAX |