Resolves,
BUG: sleeping function called from invalid context cc1(29651) at kernel/rtmutex.c:636
in_atomic():1 [00000001], irqs_disabled():0
[<c0119f50>] __might_sleep+0xf3/0xf9
[<c031600e>] __rt_spin_lock+0x21/0x3c
[<c014102c>] get_zone_pcp+0x20/0x29
[<c0141a40>] free_hot_cold_page+0xdc/0x167
[<c013a3f4>] add_preempt_count+0x12/0xcc
[<c0110d92>] pgd_dtor+0x0/0x1
[<c015d865>] quicklist_trim+0xb7/0xe3
[<c0111025>] check_pgt_cache+0x19/0x1c
[<c0148df5>] free_pgtables+0x54/0x12c
[<c013a3f4>] add_preempt_count+0x12/0xcc
[<c014e5be>] unmap_region+0xeb/0x13b
It looks like the quicklist isn't used after a few variables are evaluated.
So no need to keep preemption disabled over the whole function.
Signed-Off-By: Daniel Walker <dwalker@xxxxxxxxxx>
---
mm/quicklist.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
Index: linux-2.6.22.1/mm/quicklist.c
===================================================================
--- linux-2.6.22.1.orig/mm/quicklist.c
+++ linux-2.6.22.1/mm/quicklist.c
@@ -55,6 +55,7 @@ void quicklist_trim(int nr, void (*dtor)
q = &get_cpu_var(quicklist)[nr];
if (q->nr_pages > min_pages) {
pages_to_free = min_pages_to_free(q, min_pages, max_free);
+ put_cpu_var(quicklist);
while (pages_to_free > 0) {
/*
@@ -68,8 +69,8 @@ void quicklist_trim(int nr, void (*dtor)
free_page((unsigned long)p);
pages_to_free--;
}
- }
- put_cpu_var(quicklist);
+ } else
+ put_cpu_var(quicklist);
}
unsigned long quicklist_total_size(void)
--
--
-
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