Messages in this thread | | | From | "Aneesh Kumar K.V" <> | Subject | Re: [PATCH -V8 15/16] hugetlb/cgroup: migrate hugetlb cgroup info from oldpage to new page during migration | Date | Mon, 11 Jun 2012 15:47:28 +0530 |
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Michal Hocko <mhocko@suse.cz> writes:
> On Sat 09-06-12 14:30:00, Aneesh Kumar K.V wrote: >> From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> >> >> With HugeTLB pages, hugetlb cgroup is uncharged in compound page >> destructor. Since we are holding a hugepage reference, > > Who is holding that reference? I do not see anybody calling get_page in > this patch... >
soft_offline_huge_page takes the reference. It does the final put_page(hpage) there.
>> we can be sure that old page won't get uncharged till the last >> put_page(). >>
-aneesh
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