On 09/26/2017 11:22 AM, Xishi Qiu wrote: > On 2017/9/26 17:13, Xishi Qiu wrote: >>> This is still very fuzzy. What are you actually trying to achieve? >> >> I don't expect page fault any more after mlock. >> > > Our apps is some thing like RT, and page-fault maybe cause a lot of time, > e.g. lock, mem reclaim ..., so I use mlock and don't want page fault > any more. Why does your app then have restricted mprotect when calling mlockall() and only later adjusts the mprotect? Vlastimil -- 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>