On 12/10/18 9:00 AM, Robin Murphy wrote: > Hi all, > > Here's some assorted cleanup and improvements to dma-debug which grew > out of the problem that certain drivers use very large numbers of DMA > mappings, and knowing when to override "dma_debug_entries=..." and what > value to override it with can be a less-than-obvious task for users. > > The main part is patch #4, wherein we make dma-debug clever enough > to allocate more entries dynamically if needed, such that the > preallocation value becomes more of a quality-of-life option than a > necessity. Patches #5 and #6 do some cruft-removal to allow patch #7 > to make the allocation behaviour more efficient in general. > > Patches #1, #2 and #4 are some other cleanup and handy features which > fell out of the discussion/development. > > Robin. > > > Robin Murphy (7): > dma-debug: Use pr_fmt() > dma-debug: Expose nr_total_entries in debugfs > dma-debug: Dynamically expand the dma_debug_entry pool > dma-debug: Make leak-like behaviour apparent > x86/dma/amd-gart: Stop resizing dma_debug_entry pool > dma/debug: Remove dma_debug_resize_entries() > dma-debug: Batch dma_debug_entry allocation > > Documentation/DMA-API.txt | 20 +- > Documentation/x86/x86_64/boot-options.txt | 5 +- > arch/x86/kernel/amd_gart_64.c | 23 --- > include/linux/dma-debug.h | 7 - > kernel/dma/debug.c | 217 ++++++++++------------ > 5 files changed, 109 insertions(+), 163 deletions(-) >
Tested-by: Qian Cai <[email protected]>
