Messages in this thread | | | Subject | Re: [PATCH][RFC][0/4] InfiniBand userspace verbs implementation | From | Roland Dreier <> | Date | Mon, 11 Apr 2005 08:34:19 -0700 |
| |
Troy> How is memory pinning handled? (I haven't had time to read Troy> all the code, so please excuse my ignorance of something Troy> obvious).
The userspace library calls mlock() and then the kernel does get_user_pages().
Troy> The old mellanox drivers used to have a hack to call Troy> 'sys_mlock', and promiscuously lock memory any old userspace Troy> application asked for. What is the API for the new uverbs Troy> memory registration, and how will things like memory hotplug Troy> and NUMA page migration be able to unpin pages locked by a Troy> user program?
The API for uverbs memory registration is ibv_reg_mr(), and right now the memory is pinned and that's it.
- R. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |