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| author | Joerg Roedel <joerg.roedel@amd.com> | 2008-12-12 16:13:04 +0100 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-01-03 14:12:00 +0100 |
| commit | 8ecaf8f19f0f0627d6ac6d69ed9472e7d307f35b (patch) | |
| tree | 1b2ff78164c6fa11cd2a66060d8bfc1ff2d315f2 /arch | |
| parent | 5774f7c5fef2526bfa58eab628fbe91dce5e07b1 (diff) | |
AMD IOMMU: add statistics about total number of map requests
Impact: see total number of map requests in debugfs
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch')
| -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 69f367b033a2..0c504b207bf9 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -75,6 +75,7 @@ DECLARE_STATS_COUNTER(cross_page); DECLARE_STATS_COUNTER(domain_flush_single); DECLARE_STATS_COUNTER(domain_flush_all); DECLARE_STATS_COUNTER(alloced_io_mem); +DECLARE_STATS_COUNTER(total_map_requests); static struct dentry *stats_dir; static struct dentry *de_isolate; @@ -112,6 +113,7 @@ static void amd_iommu_stats_init(void) amd_iommu_stats_add(&domain_flush_single); amd_iommu_stats_add(&domain_flush_all); amd_iommu_stats_add(&alloced_io_mem); + amd_iommu_stats_add(&total_map_requests); } #endif @@ -1229,6 +1231,8 @@ static dma_addr_t __map_single(struct device *dev, pages = iommu_num_pages(paddr, size, PAGE_SIZE); paddr &= PAGE_MASK; + INC_STATS_COUNTER(total_map_requests); + if (pages > 1) INC_STATS_COUNTER(cross_page); |