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Date: Thu, 9 Nov 2017 09:46:42 -0600 (CST) From: Christopher Lameter <cl@...ux.com> To: Yisheng Xie <xieyisheng1@...wei.com> cc: Vlastimil Babka <vbabka@...e.cz>, akpm@...ux-foundation.org, mhocko@...e.com, mingo@...nel.org, rientjes@...gle.com, n-horiguchi@...jp.nec.com, salls@...ucsb.edu, linux-mm@...ck.org, linux-kernel@...r.kernel.org, tanxiaojun@...wei.com, linux-api@...r.kernel.org, Andi Kleen <ak@...ux.intel.com> Subject: Re: [PATCH RFC v2 4/4] mm/mempolicy: add nodes_empty check in SYSC_migrate_pages On Thu, 9 Nov 2017, Yisheng Xie wrote: > > The caller of migrate_pages should be able to migrate the target process > > pages anywhere the caller can allocate memory. If that is outside the > > target processes cpuset then that is fine. Pagecache pages that are not > > allocated by the target process already are not subject to the target > > processes restriction. So this is not that unusual. > > So there is no need to check the restriction of target process cpuset, right? > I hope that I do not miss anything :) Exactly.
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