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| author | Brian Norris <computersforpeace@gmail.com> | 2014-08-19 11:57:23 -0700 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-08-19 11:57:23 -0700 |
| commit | 5b49ab3e03f68eb49db4bce6290e5707b7f6c6f3 (patch) | |
| tree | 090c7c069bc6c0f2b368ed8d0af861c275525411 /kernel/tsacct.c | |
| parent | b25046b1e5e3f1423434da77ccc859f2f779d1ce (diff) | |
| parent | 54ea17a597b00e46b3720e75dd7595cd5dfa5670 (diff) | |
| download | linux-stable-5b49ab3e03f68eb49db4bce6290e5707b7f6c6f3.tar.gz linux-stable-5b49ab3e03f68eb49db4bce6290e5707b7f6c6f3.tar.bz2 linux-stable-5b49ab3e03f68eb49db4bce6290e5707b7f6c6f3.zip | |
Merge l2-mtd/next into l2-mtd/master
Diffstat (limited to 'kernel/tsacct.c')
| -rw-r--r-- | kernel/tsacct.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/kernel/tsacct.c b/kernel/tsacct.c index a1dd9a1b1327..975cb49e32bf 100644 --- a/kernel/tsacct.c +++ b/kernel/tsacct.c @@ -31,20 +31,19 @@ void bacct_add_tsk(struct user_namespace *user_ns, struct taskstats *stats, struct task_struct *tsk) { const struct cred *tcred; - struct timespec uptime, ts; cputime_t utime, stime, utimescaled, stimescaled; - u64 ac_etime; + u64 delta; BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN); - /* calculate task elapsed time in timespec */ - do_posix_clock_monotonic_gettime(&uptime); - ts = timespec_sub(uptime, tsk->start_time); - /* rebase elapsed time to usec (should never be negative) */ - ac_etime = timespec_to_ns(&ts); - do_div(ac_etime, NSEC_PER_USEC); - stats->ac_etime = ac_etime; - stats->ac_btime = get_seconds() - ts.tv_sec; + /* calculate task elapsed time in nsec */ + delta = ktime_get_ns() - tsk->start_time; + /* Convert to micro seconds */ + do_div(delta, NSEC_PER_USEC); + stats->ac_etime = delta; + /* Convert to seconds for btime */ + do_div(delta, USEC_PER_SEC); + stats->ac_btime = get_seconds() - delta; if (thread_group_leader(tsk)) { stats->ac_exitcode = tsk->exit_code; if (tsk->flags & PF_FORKNOEXEC) |