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authorJoerg Roedel <joerg.roedel@amd.com>2008-12-12 15:16:38 +0100
committerJoerg Roedel <joerg.roedel@amd.com>2009-01-03 14:11:59 +0100
commit5d31ee7e08b7713596b999a42e67491bdf3665b3 (patch)
tree3e1e5f7c99d9f9de14b7bed4f7c5c4f174f8f68b /arch
parentc8f0fb36bffa9e21d214a2910b825567d52bfc2c (diff)
downloadlinux-5d31ee7e08b7713596b999a42e67491bdf3665b3.tar.bz2
AMD IOMMU: add stats counter for free_coherent requests
Impact: see number of free_coherent requests in debugfs Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/amd_iommu.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index ecc89f8857b6..112412d733ab 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -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;