> My best theory so far: > malloc()/free() actually use mmap()/munmap() for large allocations. > mallopt(3) tells me that [...] Many things I don't grab at first go :-) Last night I did a long git-bisect of the kernel and was able to pinpoint a change in the Linux memory management as cause (see my pre-prepared email I just sent). Would that fit into your theory? > You could try to gather some data on this by [...] Before I dive into that maybe you could throw a quick look at the causing Kernel change (which reading from the words _could_ be related) if this fits into the picture? If yes, I'm happy to try to assist you in further pinning this issue down! -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html