On 2015/11/13 5:55, Jesper Dangaard Brouer wrote:
Hi MM-people, How do you/we test the error paths when the system runs out of memory? What kind of tools do you use? or Any tricks to provoke this?
I use SystemTap for injecting memory allocation failure. http://lkml.kernel.org/r/201503182136.EJC90660.QSFOVJFOLHFOtM@xxxxxxxxxxxxxxxxxxx
For testing my recent change to the SLUB allocator, I've implemented a crude kernel module that tries to allocate all memory, so I can test the error code-path in kmem_cache_alloc_bulk. see: https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/mm/slab_bulk_test04_exhaust_mem.c
I think you can test the error code-path in kmem_cache_alloc_bulk as well. -- 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>