I've noticed that there is no interfaces exposed by CMA which would let me fuzz what's going on in there. This small patch set exposes some information out to userspace, plus adds the ability to trigger allocation and freeing from userspace. Changes from v4: - Inform user if he has attempted to free a partial block when the page order != 0. Changes from v3: - Minor build fix, sent incorrect patch for v3 Changes from v2: - Keep allocated memory lists per-cma - Don't allow partial free with non-zero order_per_bit - Use 0 alignment Changes from v1: - Make allocation and free hooks per-cma. - Remove additional debug prints. Sasha Levin (3): mm: cma: debugfs interface mm: cma: allocation trigger mm: cma: release trigger mm/Kconfig | 6 ++ mm/Makefile | 1 + mm/cma.c | 25 ++++----- mm/cma.h | 24 ++++++++ mm/cma_debug.c | 170 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 211 insertions(+), 15 deletions(-) create mode 100644 mm/cma.h create mode 100644 mm/cma_debug.c -- 1.7.10.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>