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Commit 5d31ee7e authored by Joerg Roedel's avatar Joerg Roedel
Browse files

AMD IOMMU: add stats counter for free_coherent requests 



Impact: see number of free_coherent requests in debugfs

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent c8f0fb36

arch/x86/kernel/amd_iommu.c

+4 −0
Original line number Diff line number Diff line
@@ -70,6 +70,7 @@ DECLARE_STATS_COUNTER(cnt_unmap_single); 
DECLARE_STATS_COUNTER(cnt_map_sg);

DECLARE_STATS_COUNTER(cnt_unmap_sg);

DECLARE_STATS_COUNTER(cnt_alloc_coherent);

DECLARE_STATS_COUNTER(cnt_free_coherent);



static struct dentry *stats_dir;

static struct dentry *de_isolate;
@@ -102,6 +103,7 @@ static void amd_iommu_stats_init(void) 
	amd_iommu_stats_add(&cnt_map_sg);

	amd_iommu_stats_add(&cnt_unmap_sg);

	amd_iommu_stats_add(&cnt_alloc_coherent);

	amd_iommu_stats_add(&cnt_free_coherent);

}



#endif
@@ -1541,6 +1543,8 @@ static void free_coherent(struct device *dev, size_t size, 
	struct protection_domain *domain;

	u16 devid;



	INC_STATS_COUNTER(cnt_free_coherent);



	if (!check_device(dev))

		return;