Merge git://oss.sgi.com:8090/xfs/xfs-2.6

[linux-drm-fsl-dcu.git] / kernel / tsacct.c

diff --git a/kernel/tsacct.c b/kernel/tsacct.c
index db443221ba5ba0038ee3bd40270f6b5a2a8922b7..baacc36914152271e01343e5a4de233e7b8780ba 100644 (file)
--- a/kernel/tsacct.c
+++ b/kernel/tsacct.c
@@ -36,7 +36,7 @@ void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
 
        /* calculate task elapsed time in timespec */
        do_posix_clock_monotonic_gettime(&uptime);
-       ts = timespec_sub(uptime, current->group_leader->start_time);
+       ts = timespec_sub(uptime, tsk->start_time);
        /* rebase elapsed time to usec */
        ac_etime = timespec_to_ns(&ts);
        do_div(ac_etime, NSEC_PER_USEC);
@@ -58,7 +58,10 @@ void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
        stats->ac_uid    = tsk->uid;
        stats->ac_gid    = tsk->gid;
        stats->ac_pid    = tsk->pid;
-       stats->ac_ppid   = (tsk->parent) ? tsk->parent->pid : 0;
+       rcu_read_lock();
+       stats->ac_ppid   = pid_alive(tsk) ?
+                               rcu_dereference(tsk->real_parent)->tgid : 0;
+       rcu_read_unlock();
        stats->ac_utime  = cputime_to_msecs(tsk->utime) * USEC_PER_MSEC;
        stats->ac_stime  = cputime_to_msecs(tsk->stime) * USEC_PER_MSEC;
        stats->ac_minflt = tsk->min_flt;
@@ -77,18 +80,31 @@ void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
  */
 void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
 {
+       struct mm_struct *mm;
+
        /* convert pages-jiffies to Mbyte-usec */
        stats->coremem = jiffies_to_usecs(p->acct_rss_mem1) * PAGE_SIZE / MB;
        stats->virtmem = jiffies_to_usecs(p->acct_vm_mem1) * PAGE_SIZE / MB;
-       if (p->mm) {
+       mm = get_task_mm(p);
+       if (mm) {
                /* adjust to KB unit */
-               stats->hiwater_rss   = p->mm->hiwater_rss * PAGE_SIZE / KB;
-               stats->hiwater_vm    = p->mm->hiwater_vm * PAGE_SIZE / KB;
+               stats->hiwater_rss   = mm->hiwater_rss * PAGE_SIZE / KB;
+               stats->hiwater_vm    = mm->hiwater_vm * PAGE_SIZE / KB;
+               mmput(mm);
        }
        stats->read_char        = p->rchar;
        stats->write_char       = p->wchar;
        stats->read_syscalls    = p->syscr;
        stats->write_syscalls   = p->syscw;
+#ifdef CONFIG_TASK_IO_ACCOUNTING
+       stats->read_bytes       = p->ioac.read_bytes;
+       stats->write_bytes      = p->ioac.write_bytes;
+       stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes;
+#else
+       stats->read_bytes       = 0;
+       stats->write_bytes      = 0;
+       stats->cancelled_write_bytes = 0;
+#endif
 }
 #undef KB
 #undef MB