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| author | Corentin Labbe <clabbe@baylibre.com> | 2019-01-18 13:44:18 +0000 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-02-01 10:06:44 +0100 |
| commit | 0a3b192c26da198fce38e1ee242a34f558670246 (patch) | |
| tree | 50c7205f8335fed7863f9446db981936cd350a6e /Documentation/DMA-API.txt | |
| parent | 8e4d81b98b7859b120dd142c8634f625db118b30 (diff) | |
| download | linux-0a3b192c26da198fce38e1ee242a34f558670246.tar.bz2 | |
dma-debug: add dumping facility via debugfs
While debugging a DMA mapping leak, I needed to access
debug_dma_dump_mappings() but easily from user space.
This patch adds a /sys/kernel/debug/dma-api/dump file which contain all
current DMA mapping.
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'Documentation/DMA-API.txt')
| -rw-r--r-- | Documentation/DMA-API.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt index e133ccd60228..78114ee63057 100644 --- a/Documentation/DMA-API.txt +++ b/Documentation/DMA-API.txt @@ -696,6 +696,9 @@ dma-api/disabled This read-only file contains the character 'Y' happen when it runs out of memory or if it was disabled at boot time +dma-api/dump This read-only file contains current DMA + mappings. + dma-api/error_count This file is read-only and shows the total numbers of errors found. |