commit 55877a6bcdf0843414eecc658550c6551f5b5e1d
author Joerg Roedel <joerg.roedel@amd.com> Fri Dec 12 15:12:14 2008 +0100
committer Joerg Roedel <joerg.roedel@amd.com> Sat Jan 03 14:11:59 2009 +0100
tree 360fcc7c677260b372c5875a7b88966f79752eee
parent d03f067a9d0a1cc09529427af9a15e15d32ba1de

AMD IOMMU: add stats counter for unmap_sg requests

Impact: see number of unmap_sg requests in debugfs

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

arch/x86/kernel/amd_iommu.c

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 859ca74..49f2c85 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -68,6 +68,7 @@
 DECLARE_STATS_COUNTER(cnt_map_single);
 DECLARE_STATS_COUNTER(cnt_unmap_single);
 DECLARE_STATS_COUNTER(cnt_map_sg);
+DECLARE_STATS_COUNTER(cnt_unmap_sg);
 
 static struct dentry *stats_dir;
 static struct dentry *de_isolate;
@@ -98,6 +99,7 @@
 	amd_iommu_stats_add(&cnt_map_single);
 	amd_iommu_stats_add(&cnt_unmap_single);
 	amd_iommu_stats_add(&cnt_map_sg);
+	amd_iommu_stats_add(&cnt_unmap_sg);
 }
 
 #endif
@@ -1443,6 +1445,8 @@
 	u16 devid;
 	int i;
 
+	INC_STATS_COUNTER(cnt_unmap_sg);
+
 	if (!check_device(dev) ||
 	    !get_device_resources(dev, &iommu, &domain, &devid))
 		return;