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authorOleg Nesterov <oleg@tv-sign.ru>2006-03-28 16:11:25 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-28 18:36:44 -0800
commit47e65328a7b1cdfc4e3102e50d60faf94ebba7d3 (patch)
tree78e00a5321cca87767806a91e623e71b5c6637c7 /include/linux/pid.h
parent88531f725bd52e37a7be726860e4ff3f09031d89 (diff)
downloadop-kernel-dev-47e65328a7b1cdfc4e3102e50d60faf94ebba7d3.zip
op-kernel-dev-47e65328a7b1cdfc4e3102e50d60faf94ebba7d3.tar.gz
[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.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/pid.h b/include/linux/pid.h
index 099e70e..5b9082c 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
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