On Sat 17-04-21 12:40:32, Peter Enderborg wrote: > This adds a total used dma-buf memory. Details > can be found in debugfs, however it is not for everyone > and not always available. dma-buf are indirect allocated by > userspace. So with this value we can monitor and detect > userspace applications that have problems. The changelog would benefit from more background on why this is needed, and who is the primary consumer of that value. I cannot really comment on the dma-buf internals but I have two remarks. Documentation/filesystems/proc.rst needs an update with the counter explanation and secondly is this information useful for OOM situations analysis? If yes then show_mem should dump the value as well. >From the implementation point of view, is there any reason why this hasn't used the existing global_node_page_state infrastructure? -- Michal Hocko SUSE Labs
