On Fri, 2019-03-15 at 17:01 +0100, Cyril Hrubis wrote: > Hi! > I've started to write tests for mbind() and found out that mbind() does > not work as described in manual page in a case that page has been > faulted on different node that we are asking it to bind to. Looks like > this is working fine on older kernels. On my testing machine with 3.0 > mbind() fails correctly with EIO but succeeds unexpectedly on newer > kernels such as 4.12. > > What the test does is: > > * mmap() private mapping > * fault it > * find out on which node it is faulted on > * mbind() it to a different node with MPOL_BIND and MPOL_MF_STRICT and > expects to get EIO > > The test code can be seen and compiled from: > > https://github.com/metan-ucw/ltp/blob/master/testcases/kernel/syscalls/mbind/m > bind02.c > I am too lazy to checkout the repository and compile the whole thing just to be able to reproduce. If you can make it a standalone program without LTP markups, I'd be happy to take a look.
