Messages in this thread | | | Date | Wed, 31 Jul 2013 10:49:24 +0800 | Subject | Re: [PATCH 01/18] mm, hugetlb: protect reserved pages when softofflining requests the pages | From | Hillf Danton <> |
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On Wed, Jul 31, 2013 at 10:27 AM, Joonsoo Kim <iamjoonsoo.kim@lge.com> wrote: > On Mon, Jul 29, 2013 at 03:24:46PM +0800, Hillf Danton wrote: >> On Mon, Jul 29, 2013 at 1:31 PM, Joonsoo Kim <iamjoonsoo.kim@lge.com> wrote: >> > alloc_huge_page_node() use dequeue_huge_page_node() without >> > any validation check, so it can steal reserved page unconditionally. >> >> Well, why is it illegal to use reserved page here? > > If we use reserved page here, other processes which are promised to use > enough hugepages cannot get enough hugepages and can die. This is > unexpected result to them. > But, how do you determine that a huge page is requested by a process that is not allowed to use reserved pages?
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