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AMD IOMMU: add stats counter for free_coherent requests
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Impact: see number of free_coherent requests in debugfs

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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Joerg Roedel committed Jan 3, 2009
1 parent c8f0fb3 commit 5d31ee7
Showing 1 changed file with 4 additions and 0 deletions.
4 changes: 4 additions & 0 deletions arch/x86/kernel/amd_iommu.c
Original file line number Diff line number Diff line change
Expand Up @@ -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;
Expand Down Expand Up @@ -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
Expand Down Expand Up @@ -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;

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