On Tue, 17 Nov 2015, Jesper Dangaard Brouer wrote: > I did manage to provoke/test the error path in kmem_cache_alloc_bulk(), > by using fault-injection framework "fail_page_alloc". > > But was a little hard to trigger SLUB errors with this, because SLUB > retries after a failure, and second call to alloc_pages() is done with > lower order. > > If order is lowered to zero, then should_fail_alloc_page() will skip it. > And just lowering /sys/kernel/debug/fail_page_alloc/min-order=0 is not > feasible as even fork starts to fail. I managed to work-around this by > using "space" setting. > > Created a script to ease this tricky invocation: > https://github.com/netoptimizer/prototype-kernel/blob/master/tests/fault-inject/fail01_kmem_cache_alloc_bulk.sh > Any chance you could proffer some of your scripts in the form of patches to the tools/testing directory? Anything that can reliably trigger rarely executed code is always useful. -- 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>