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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2009-04-14 09:43:19 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-15 12:22:47 +0200 |
| commit | 19c1a6f5764d787113fa323ffb18be7991208f82 (patch) | |
| tree | 97b5c7e9be546ecaf6df41fe1fbec6ec0f816a6b /arch/x86/Kconfig.debug | |
| parent | e6a1a89d572c31b62d6dcf11a371c7323852d9b2 (diff) | |
| download | lwn-19c1a6f5764d787113fa323ffb18be7991208f82.tar.gz lwn-19c1a6f5764d787113fa323ffb18be7991208f82.zip | |
x86 gart: reimplement IOMMU_LEAK feature by using DMA_API_DEBUG
IOMMU_LEAK, GART's own feature, dumps the used IOMMU entries when
IOMMU entries is full, which might be useful to find a bad driver that
eats IOMMU entries.
DMA_API_DEBUG provides the similar feature, debug_dma_dump_mappings,
and it's better than GART's IOMMU_LEAK feature. GART's IOMMU_LEAK
feature doesn't say who uses IOMMU entries so it's hard to find a bad
driver.
This patch reimplements the GART's IOMMU_LEAK feature by using
DMA_API_DEBUG.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <1239669799-23579-2-git-send-email-fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/Kconfig.debug')
| -rw-r--r-- | arch/x86/Kconfig.debug | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index d8359e73317f..5865712d105d 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -161,8 +161,7 @@ config IOMMU_DEBUG config IOMMU_LEAK bool "IOMMU leak tracing" - depends on DEBUG_KERNEL - depends on IOMMU_DEBUG + depends on IOMMU_DEBUG && DMA_API_DEBUG ---help--- Add a simple leak tracer to the IOMMU code. This is useful when you are debugging a buggy device driver that leaks IOMMU mappings. |