Messages in this thread Patch in this message | | | Date | Wed, 20 Feb 2008 19:14:39 +0300 | From | Oleg Nesterov <> | Subject | [PATCH] (for -mm only) put_pid: make sure we don't free the live pid |
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[PATCH] (for -mm only) put_pid: make sure we don't free the live pid
Add the temporary (for -mm only) debugging code to catch the unbalanced put_pid()'s. At least those which can free the "live" pid.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
--- MM/kernel/pid.c~ 2008-02-20 18:29:40.000000000 +0300 +++ MM/kernel/pid.c 2008-02-20 18:35:15.000000000 +0300 @@ -208,6 +208,10 @@ void put_pid(struct pid *pid) ns = pid->numbers[pid->level].ns; if ((atomic_read(&pid->count) == 1) || atomic_dec_and_test(&pid->count)) { + int type = PIDTYPE_MAX; + while (--type >= 0) + if (WARN_ON(!hlist_empty(&pid->tasks[type]))) + return; kmem_cache_free(ns->pid_cachep, pid); put_pid_ns(ns); }
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