Skip to content
Commit 71cdec4f authored by David Rientjes's avatar David Rientjes Committed by Christoph Hellwig
Browse files

dma-mapping: warn when coherent pool is depleted



When a DMA coherent pool is depleted, allocation failures may or may not
get reported in the kernel log depending on the allocator.

The admin does have a workaround, however, by using coherent_pool= on the
kernel command line.

Provide some guidance on the failure and a recommended minimum size for
the pools (double the size).

Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
Tested-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 9ebcfadb
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment