path: root/Documentation/DMA-API.txt
diff options
authorRobin Murphy <robin.murphy@arm.com>2018-12-10 14:00:28 (GMT)
committerChristoph Hellwig <hch@lst.de>2018-12-11 13:31:17 (GMT)
commit9f191555ba4ba8fc82e589670e46a7f79b72a157 (patch)
treebcebdb4a6936baa0b76afc0fcb2af283a8f9c889 /Documentation/DMA-API.txt
parent7c703e54cc71df5baa962e24a5663d88173bba5c (diff)
dma-debug: Expose nr_total_entries in debugfs
Expose nr_total_entries in debugfs, so that {num,min}_free_entries become even more meaningful to users interested in current/maximum utilisation. This becomes even more relevant once nr_total_entries may change at runtime beyond just the existing AMD GART debug code. Suggested-by: John Garry <john.garry@huawei.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Tested-by: Qian Cai <cai@lca.pw> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'Documentation/DMA-API.txt')
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt
index ac66ae2..6bdb095 100644
--- a/Documentation/DMA-API.txt
+++ b/Documentation/DMA-API.txt
@@ -723,6 +723,9 @@ dma-api/min_free_entries This read-only file can be read to get the
dma-api/num_free_entries The current number of free dma_debug_entries
in the allocator.
+dma-api/nr_total_entries The total number of dma_debug_entries in the
+ allocator, both free and used.
dma-api/driver-filter You can write a name of a driver into this file
to limit the debug output to requests from that
particular driver. Write an empty string to