On system where dma-buf is used it can be many clients that adds up to a lot of memory. This can be relevant for OOM handling when running out of memory or how system handle this memory. It may be to free with a kill.
Suggested-by: Michal Hocko mhocko@suse.com Signed-off-by: Peter Enderborg peter.enderborg@sony.com --- lib/show_mem.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/lib/show_mem.c b/lib/show_mem.c index 1c26c14ffbb9..ec4748c64353 100644 --- a/lib/show_mem.c +++ b/lib/show_mem.c @@ -7,6 +7,7 @@
#include <linux/mm.h> #include <linux/cma.h> +#include <linux/dma-buf.h>
void show_mem(unsigned int filter, nodemask_t *nodemask) { @@ -41,4 +42,8 @@ void show_mem(unsigned int filter, nodemask_t *nodemask) #ifdef CONFIG_MEMORY_FAILURE printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages)); #endif +#ifdef CONFIG_DMA_SHARED_BUFFER + printk("%lu pages dma-buf\n", dma_buf_allocated_pages()); +#endif + }