From: Joerg Roedel Date: Fri, 12 Dec 2008 15:13:04 +0000 (+0100) Subject: AMD IOMMU: add statistics about total number of map requests X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8ecaf8f19f0f0627d6ac6d69ed9472e7d307f35b;p=linux-beck.git AMD IOMMU: add statistics about total number of map requests Impact: see total number of map requests in debugfs Signed-off-by: Joerg Roedel --- 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);