On Mon, 20 Aug 2012 12:47:27 +0200 Marek Szyprowski m.szyprowski@samsung.com wrote:
Print a loud warning when system runs out of memory from atomic coherent pool to let users notice the potential problem.
Reported-by: Aaro Koskinen aaro.koskinen@iki.fi Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com
arch/arm/mm/dma-mapping.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index d1cc9c1..25963ea 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -461,6 +461,9 @@ static void *__alloc_from_pool(size_t size, struct page **ret_page) bitmap_set(pool->bitmap, pageno, count); ptr = pool->vaddr + PAGE_SIZE * pageno; *ret_page = pool->page + pageno;
- } else {
pr_err("Atomic coherent pool too small!\n""Please increase it with kernel parameter!\n");
It might be a little bit nicer if the current pool size is printed in the above too. That could be the hint for how much to specify in "coherent_pool=".