[PATCH] obscure pid implementation fix
From: Kirill Korotaev (kksx_at_mail.ru)
Date: 08/31/04
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To: akpm@osdl.org, torvalds@osdl.org Date: Tue, 31 Aug 2004 16:29:03 +0400
This patch fixes strange and obscure pid implementation in current kernels:
- it removes calling of put_task_struct() from detach_pid()
under tasklist_lock. This allows to use blocking calls
in security_task_free() hooks (in __put_task_struct()).
- it saves some space = 5*5 ints = 100 bytes in task_struct
- it's smaller and tidy, more straigthforward and doesn't use
any knowledge about pids using and assignment.
- it removes pid_links and pid_struct doesn't hold reference counters
on task_struct. instead, new pid_structs and linked altogether and
only one of them is inserted in hash_list.
Kirill
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