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| author | Robin Murphy <robin.murphy@arm.com> | 2018-12-10 15:00:30 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-12-11 14:31:18 +0100 |
| commit | ceb51173b2b5bd7af0d99079f6bbacdcfc58fe08 (patch) | |
| tree | bc9245f7e98c8e07a1d203d143da808330c244fd /Documentation/x86 | |
| parent | dma-debug: Dynamically expand the dma_debug_entry pool (diff) | |
| download | linux-ceb51173b2b5bd7af0d99079f6bbacdcfc58fe08.tar.xz linux-ceb51173b2b5bd7af0d99079f6bbacdcfc58fe08.zip | |
dma-debug: Make leak-like behaviour apparent
Now that we can dynamically allocate DMA debug entries to cope with
drivers maintaining excessively large numbers of live mappings, a driver
which *does* actually have a bug leaking mappings (and is not unloaded)
will no longer trigger the "DMA-API: debugging out of memory - disabling"
message until it gets to actual kernel OOM conditions, which means it
could go unnoticed for a while. To that end, let's inform the user each
time the pool has grown to a multiple of its initial size, which should
make it apparent that they either have a leak or might want to increase
the preallocation size.
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/x86')
0 files changed, 0 insertions, 0 deletions