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-rw-r--r--mm/thrash.c32
1 files changed, 15 insertions, 17 deletions
diff --git a/mm/thrash.c b/mm/thrash.c
index c4c5205a9c3..2372d4ed5dd 100644
--- a/mm/thrash.c
+++ b/mm/thrash.c
@@ -26,47 +26,45 @@ static DEFINE_SPINLOCK(swap_token_lock);
26struct mm_struct *swap_token_mm; 26struct mm_struct *swap_token_mm;
27static unsigned int global_faults; 27static unsigned int global_faults;
28 28
29void grab_swap_token(void) 29void grab_swap_token(struct mm_struct *mm)
30{ 30{
31 int current_interval; 31 int current_interval;
32 32
33 global_faults++; 33 global_faults++;
34 34
35 current_interval = global_faults - current->mm->faultstamp; 35 current_interval = global_faults - mm->faultstamp;
36 36
37 if (!spin_trylock(&swap_token_lock)) 37 if (!spin_trylock(&swap_token_lock))
38 return; 38 return;
39 39
40 /* First come first served */ 40 /* First come first served */
41 if (swap_token_mm == NULL) { 41 if (swap_token_mm == NULL) {
42 current->mm->token_priority = current->mm->token_priority + 2; 42 mm->token_priority = mm->token_priority + 2;
43 swap_token_mm = current->mm; 43 swap_token_mm = mm;
44 goto out; 44 goto out;
45 } 45 }
46 46
47 if (current->mm != swap_token_mm) { 47 if (mm != swap_token_mm) {
48 if (current_interval < current->mm->last_interval) 48 if (current_interval < mm->last_interval)
49 current->mm->token_priority++; 49 mm->token_priority++;
50 else { 50 else {
51 if (likely(current->mm->token_priority > 0)) 51 if (likely(mm->token_priority > 0))
52 current->mm->token_priority--; 52 mm->token_priority--;
53 } 53 }
54 /* Check if we deserve the token */ 54 /* Check if we deserve the token */
55 if (current->mm->token_priority > 55 if (mm->token_priority > swap_token_mm->token_priority) {
56 swap_token_mm->token_priority) { 56 mm->token_priority += 2;
57 current->mm->token_priority += 2; 57 swap_token_mm = mm;
58 swap_token_mm = current->mm;
59 } 58 }
60 } else { 59 } else {
61 /* Token holder came in again! */ 60 /* Token holder came in again! */
62 current->mm->token_priority += 2; 61 mm->token_priority += 2;
63 } 62 }
64 63
65out: 64out:
66 current->mm->faultstamp = global_faults; 65 mm->faultstamp = global_faults;
67 current->mm->last_interval = current_interval; 66 mm->last_interval = current_interval;
68 spin_unlock(&swap_token_lock); 67 spin_unlock(&swap_token_lock);
69return;
70} 68}
71 69
72/* Called on process exit. */ 70/* Called on process exit. */