From: zhong jiang <zhongjiang@xxxxxxxxxx>
when commit 374ad05ab64d ("mm, page_alloc: only use per-cpu allocator for irq-safe requests")
introduced to the mainline, free_pcppages_bulk irq_save/resave to protect
the IRQ context. but drain_pages_zone fails to clear away the irq. because
preempt_disable have take effect. so it safely remove the code.
Fixes: 374ad05ab64d ("mm, page_alloc: only use per-cpu allocator for irq-safe requests")
Signed-off-by: zhong jiang <zhongjiang@xxxxxxxxxx>
---
mm/page_alloc.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 05c3956..7b16095 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2294,11 +2294,9 @@ void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp)
*/
static void drain_pages_zone(unsigned int cpu, struct zone *zone)
{
- unsigned long flags;
struct per_cpu_pageset *pset;
struct per_cpu_pages *pcp;
- local_irq_save(flags);
pset = per_cpu_ptr(zone->pageset, cpu);
pcp = &pset->pcp;
@@ -2306,7 +2304,6 @@ static void drain_pages_zone(unsigned int cpu, struct zone *zone)
free_pcppages_bulk(zone, pcp->count, pcp);
pcp->count = 0;
}
- local_irq_restore(flags);
}
/*
--
1.8.3.1
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
