hi Christopher and Vlastimil, Thanks for your comment! On 2017/11/6 23:29, Christopher Lameter wrote: > On Mon, 6 Nov 2017, Vlastimil Babka wrote: > >> I'm not sure what exactly is the EPERM intention. Should really the >> capability of THIS process override the cpuset restriction of the TARGET >> process? Maybe yes. Then, does "insufficient privilege (CAP_SYS_NICE) to > > CAP_SYS_NICE never overrides cpuset restrictions. The cap can be used to > migrate pages that are *also* mapped by other processes (and thus move > pages of another process which may have different cpu set restrictions!).
So you means the specified nodes should be a subset of target cpu set, right? Thanks Yisheng Xie > The cap should not allow migrating pages to nodes that are not allowed by > the cpuset of the current process. > > > > . >
