On 11/09/2017 09:52 AM, Michal Hocko wrote: > I am not sure. I would rather see a tracepoint to mark the allocator > entry. This would allow both 1) measuring the allocation latency (to > compare it to the trace_mm_page_alloc and 2) check for stalls with > arbitrary user defined timeout (just print all allocations which haven't > passed trace_mm_page_alloc for the given amount of time). Traces are not that expensive, but there are more than few in calls in this path. And Im trying to keep it as small that it can used for maintenance versions too. This is suggestion is a quick way of keeping the current solution for the ones that are interested the slow allocations. If we are going for a solution with a time-out parameter from the user what interface do you suggest to do this configuration. A filter parameter for the event? -- 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>
