[PATCH] pacct: add pacct_struct to fix some pacct bugs.

The pacct facility need an i/o operation when an accounting record is
generated.  There is a possibility to wake OOM killer up.  If OOM killer is
activated, it kills some processes to make them release process memory
regions.

But acct_process() is called in the killed processes context before calling
exit_mm(), so those processes cannot release own memory.  In the results, any
processes stop in this point and it finally cause a system stall.

1 files changed, 1 insertions, 0 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 49adc0e8d47..dfd10cb370c 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -874,6 +874,7 @@ static inline int copy_signal(unsigned long clone_flags, struct task_struct * ts
                 tsk->it_prof_expires =
                         secs_to_cputime(sig->rlim[RLIMIT_CPU].rlim_cur);
         }
+        acct_init_pacct(&sig->pacct);
 
         return 0;
 }