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Merge "mm: cma: Register with show_mem notification framework"

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qctecmdr 2019-10-24 22:55:53 -07:00 • committed by Gerrit - the friendly Code Review server
commit 6324083247
1 changed files with 26 additions and 0 deletions
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26
mm/cma.c
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@ -34,6 +34,7 @@
#include <linux/io.h>
#include <linux/kmemleak.h>
#include <linux/delay.h>
#include <linux/show_mem_notifier.h>
#include <trace/events/cma.h>
#include "cma.h"
@ -96,6 +97,29 @@ static void cma_clear_bitmap(struct cma *cma, unsigned long pfn,
mutex_unlock(&cma->lock);
}
static int cma_showmem_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
int i;
unsigned long used;
struct cma *cma;
for (i = 0; i < cma_area_count; i++) {
cma = &cma_areas[i];
used = bitmap_weight(cma->bitmap,
(int)cma_bitmap_maxno(cma));
used <<= cma->order_per_bit;
pr_info("cma-%d pages: => %lu used of %lu total pages\n",
i, used, cma->count);
}
return 0;
}
static struct notifier_block cma_nb = {
.notifier_call = cma_showmem_notifier,
};
static int __init cma_activate_area(struct cma *cma)
{
int bitmap_size = BITS_TO_LONGS(cma_bitmap_maxno(cma)) * sizeof(long);
@ -158,6 +182,8 @@ static int __init cma_init_reserved_areas(void)
return ret;
}
show_mem_notifier_register(&cma_nb);
return 0;
}
core_initcall(cma_init_reserved_areas);