tree bc9245f7e98c8e07a1d203d143da808330c244fd
parent 2b9d9ac02b9d8d32c515c82bb17401c429f160ab
author Robin Murphy <robin.murphy@arm.com> 1544450430 +0000
committer Christoph Hellwig <hch@lst.de> 1544535078 +0100

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>