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-rw-r--r--mm/page-writeback.c24
1 files changed, 3 insertions, 21 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index a4317da60532..7d9a4ef0a078 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -156,24 +156,6 @@ static unsigned long writeout_period_time = 0;
#define VM_COMPLETIONS_PERIOD_LEN (3*HZ)
/*
- * Work out the current dirty-memory clamping and background writeout
- * thresholds.
- *
- * The main aim here is to lower them aggressively if there is a lot of mapped
- * memory around. To avoid stressing page reclaim with lots of unreclaimable
- * pages. It is better to clamp down on writers than to start swapping, and
- * performing lots of scanning.
- *
- * We only allow 1/2 of the currently-unmapped memory to be dirtied.
- *
- * We don't permit the clamping level to fall below 5% - that is getting rather
- * excessive.
- *
- * We make sure that the background writeout level is below the adjusted
- * clamping level.
- */
-
-/*
* In a memory zone, there is a certain amount of pages we consider
* available for the page cache, which is essentially the number of
* free and reclaimable pages, minus some zone reserves to protect
@@ -1623,7 +1605,7 @@ void balance_dirty_pages_ratelimited(struct address_space *mapping)
* 1000+ tasks, all of them start dirtying pages at exactly the same
* time, hence all honoured too large initial task->nr_dirtied_pause.
*/
- p = &__get_cpu_var(bdp_ratelimits);
+ p = this_cpu_ptr(&bdp_ratelimits);
if (unlikely(current->nr_dirtied >= ratelimit))
*p = 0;
else if (unlikely(*p >= ratelimit_pages)) {
@@ -1635,7 +1617,7 @@ void balance_dirty_pages_ratelimited(struct address_space *mapping)
* short-lived tasks (eg. gcc invocations in a kernel build) escaping
* the dirty throttling and livelock other long-run dirtiers.
*/
- p = &__get_cpu_var(dirty_throttle_leaks);
+ p = this_cpu_ptr(&dirty_throttle_leaks);
if (*p > 0 && current->nr_dirtied < ratelimit) {
unsigned long nr_pages_dirtied;
nr_pages_dirtied = min(*p, ratelimit - current->nr_dirtied);
@@ -1682,7 +1664,7 @@ void throttle_vm_writeout(gfp_t gfp_mask)
/*
* sysctl handler for /proc/sys/vm/dirty_writeback_centisecs
*/
-int dirty_writeback_centisecs_handler(ctl_table *table, int write,
+int dirty_writeback_centisecs_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *length, loff_t *ppos)
{
proc_dointvec(table, write, buffer, length, ppos);