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Date: Tue, 6 Jan 2009 10:48:39 +0100
From: Jiri Pirko <jpirko@...hat.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: kosaki.motohiro@...fujitsu.com, oleg@...hat.com,
linux-kernel@...r.kernel.org, hugh@...itas.com, linux-mm@...ck.org
Subject: Re: [PATCH for -mm] getrusage: fill ru_maxrss value
On Mon, 5 Jan 2009 14:13:13 -0800
Andrew Morton <akpm@...ux-foundation.org> wrote:
> On Mon, 5 Jan 2009 16:32:04 +0100
> Jiri Pirko <jpirko@...hat.com> wrote:
>
> > Changelog
> > v2 -> v3
> > - in k_getrusage() use (inherited) sig->maxrss value in case of
> > RUSAGE_THREAD
>
> The patch which you sent was mysteriously truncated - the kernel/sys.c hunk
> is partly missing. So I took that bit from the earlier version of the patch.
Sorry for this. I should probably toss this Claws into the garbage can :/
>
> Please check that the below is still identical to your version 3.
Nope - the tail is different. - Sending the patch again. Please use
the changelog text from previous send.
Thanks Andrew and again sorry for problems.
Signed-off-by: Jiri Pirko <jpirko@...hat.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
---
fs/exec.c | 7 +++++++
include/linux/sched.h | 1 +
kernel/exit.c | 10 ++++++++++
kernel/fork.c | 1 +
kernel/sys.c | 17 +++++++++++++++++
5 files changed, 36 insertions(+), 0 deletions(-)
diff --git a/fs/exec.c b/fs/exec.c
index 3ef9cf9..b939ef5 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -867,6 +867,13 @@ static int de_thread(struct task_struct *tsk)
sig->notify_count = 0;
no_thread_group:
+ if (current->mm) {
+ unsigned long hiwater_rss = get_mm_hiwater_rss(current->mm);
+
+ if (sig->maxrss < hiwater_rss)
+ sig->maxrss = hiwater_rss;
+ }
+
exit_itimers(sig);
flush_itimer_signals();
diff --git a/include/linux/sched.h b/include/linux/sched.h
index ea41513..62a0f45 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -560,6 +560,7 @@ struct signal_struct {
unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
unsigned long inblock, oublock, cinblock, coublock;
+ unsigned long maxrss, cmaxrss;
struct task_io_accounting ioac;
/*
diff --git a/kernel/exit.c b/kernel/exit.c
index 1a8c22f..5c0d601 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1060,6 +1060,12 @@ NORET_TYPE void do_exit(long code)
if (group_dead) {
hrtimer_cancel(&tsk->signal->real_timer);
exit_itimers(tsk->signal);
+ if (tsk->mm) {
+ unsigned long hiwater_rss = get_mm_hiwater_rss(tsk->mm);
+
+ if (tsk->signal->maxrss < hiwater_rss)
+ tsk->signal->maxrss = hiwater_rss;
+ }
}
acct_collect(code, group_dead);
if (group_dead)
@@ -1303,6 +1309,7 @@ static int wait_task_zombie(struct task_struct *p, int options,
struct signal_struct *psig;
struct signal_struct *sig;
struct task_cputime cputime;
+ unsigned long maxrss;
/*
* The resource counters for the group leader are in its
@@ -1354,6 +1361,9 @@ static int wait_task_zombie(struct task_struct *p, int options,
psig->coublock +=
task_io_get_oublock(p) +
sig->oublock + sig->coublock;
+ maxrss = max(sig->maxrss, sig->cmaxrss);
+ if (psig->cmaxrss < maxrss)
+ psig->cmaxrss = maxrss;
task_io_accounting_add(&psig->ioac, &p->ioac);
task_io_accounting_add(&psig->ioac, &sig->ioac);
spin_unlock_irq(&p->parent->sighand->siglock);
diff --git a/kernel/fork.c b/kernel/fork.c
index 43cbf30..35bec65 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -846,6 +846,7 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
sig->nvcsw = sig->nivcsw = sig->cnvcsw = sig->cnivcsw = 0;
sig->min_flt = sig->maj_flt = sig->cmin_flt = sig->cmaj_flt = 0;
sig->inblock = sig->oublock = sig->cinblock = sig->coublock = 0;
+ sig->maxrss = sig->cmaxrss = 0;
task_io_accounting_init(&sig->ioac);
taskstats_tgid_init(sig);
diff --git a/kernel/sys.c b/kernel/sys.c
index d356d79..f5ca281 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1622,12 +1622,14 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
unsigned long flags;
cputime_t utime, stime;
struct task_cputime cputime;
+ unsigned long maxrss = 0;
memset((char *) r, 0, sizeof *r);
utime = stime = cputime_zero;
if (who == RUSAGE_THREAD) {
accumulate_thread_rusage(p, r);
+ maxrss = p->signal->maxrss;
goto out;
}
@@ -1645,6 +1647,7 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
r->ru_majflt = p->signal->cmaj_flt;
r->ru_inblock = p->signal->cinblock;
r->ru_oublock = p->signal->coublock;
+ maxrss = p->signal->cmaxrss;
if (who == RUSAGE_CHILDREN)
break;
@@ -1659,6 +1662,8 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
r->ru_majflt += p->signal->maj_flt;
r->ru_inblock += p->signal->inblock;
r->ru_oublock += p->signal->oublock;
+ if (maxrss < p->signal->maxrss)
+ maxrss = p->signal->maxrss;
t = p;
do {
accumulate_thread_rusage(t, r);
@@ -1674,6 +1679,18 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
out:
cputime_to_timeval(utime, &r->ru_utime);
cputime_to_timeval(stime, &r->ru_stime);
+
+ if (who != RUSAGE_CHILDREN) {
+ struct mm_struct *mm = get_task_mm(p);
+ if (mm) {
+ unsigned long hiwater_rss = get_mm_hiwater_rss(mm);
+
+ if (maxrss < hiwater_rss)
+ maxrss = hiwater_rss;
+ mmput(mm);
+ }
+ }
+ r->ru_maxrss = maxrss * (PAGE_SIZE / 1024); /* convert pages to KBs */
}
int getrusage(struct task_struct *p, int who, struct rusage __user *ru)
--
1.6.0.3
--
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