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oom_kill: don't call for int_sqrt(0)

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There is no need to call for int_sqrt if argument is 0.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Christoph Lameter <cl@linux-foundation.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Cyrill Gorcunov 2009-03-31 15:19:27 -07:00 committed by Linus Torvalds
parent d086817dc0
commit a12888f772
1 changed files with 5 additions and 7 deletions
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12
mm/oom_kill.c
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@ -55,7 +55,7 @@ static DEFINE_SPINLOCK(zone_scan_lock);
unsigned long badness(struct task_struct *p, unsigned long uptime)
{
unsigned long points, cpu_time, run_time, s;
unsigned long points, cpu_time, run_time;
struct mm_struct *mm;
struct task_struct *child;
@ -110,12 +110,10 @@ unsigned long badness(struct task_struct *p, unsigned long uptime)
else
run_time = 0;
s = int_sqrt(cpu_time);
if (s)
points /= s;
s = int_sqrt(int_sqrt(run_time));
if (s)
points /= s;
if (cpu_time)
points /= int_sqrt(cpu_time);
if (run_time)
points /= int_sqrt(int_sqrt(run_time));
/*
* Niced processes are most likely less important, so double