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| author | Joerg Roedel <joerg.roedel@amd.com> | 2008-12-12 15:09:48 +0100 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-01-03 14:11:59 +0100 |
| commit | d03f067a9d0a1cc09529427af9a15e15d32ba1de (patch) | |
| tree | 6d09e8029cd35ed8bf769cb8af662fbac81a1a30 /arch/x86/kernel/amd_iommu.c | |
| parent | 146a6917fc30616401a090f55cff2b855ee5b2ab (diff) | |
| download | lwn-d03f067a9d0a1cc09529427af9a15e15d32ba1de.tar.gz lwn-d03f067a9d0a1cc09529427af9a15e15d32ba1de.zip | |
AMD IOMMU: add stats counter for map_sg requests
Impact: see number of map_sg requests in debugfs
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch/x86/kernel/amd_iommu.c')
| -rw-r--r-- | arch/x86/kernel/amd_iommu.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 71646c81421a..859ca741745b 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -67,6 +67,7 @@ static struct dma_ops_domain *find_protection_domain(u16 devid); DECLARE_STATS_COUNTER(compl_wait); DECLARE_STATS_COUNTER(cnt_map_single); DECLARE_STATS_COUNTER(cnt_unmap_single); +DECLARE_STATS_COUNTER(cnt_map_sg); static struct dentry *stats_dir; static struct dentry *de_isolate; @@ -96,6 +97,7 @@ static void amd_iommu_stats_init(void) amd_iommu_stats_add(&compl_wait); amd_iommu_stats_add(&cnt_map_single); amd_iommu_stats_add(&cnt_unmap_single); + amd_iommu_stats_add(&cnt_map_sg); } #endif @@ -1377,6 +1379,8 @@ static int map_sg(struct device *dev, struct scatterlist *sglist, int mapped_elems = 0; u64 dma_mask; + INC_STATS_COUNTER(cnt_map_sg); + if (!check_device(dev)) return 0; |