Messages in this thread | | | Date | Wed, 15 Nov 2017 09:12:36 +0900 | From | Minchan Kim <> | Subject | Re: [PATCH] arch, mm: introduce arch_tlb_gather_mmu_lazy (was: Re: [RESEND PATCH] mm, oom_reaper: gather each vma to prevent) leaking TLB entry |
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On Tue, Nov 14, 2017 at 08:21:00AM +0100, Michal Hocko wrote: > On Tue 14-11-17 10:45:49, Minchan Kim wrote: > [...] > > Anyway, I think Wang Nan's patch is already broken. > > http://lkml.kernel.org/r/%3C20171107095453.179940-1-wangnan0@huawei.com%3E > > > > Because unmap_page_range(ie, zap_pte_range) can flush TLB forcefully > > and free pages. However, the architecture code for TLB flush cannot > > flush at all by wrong fullmm so other threads can write freed-page. > > I am not sure I understand what you mean. How is that any different from > any other explicit partial madvise call?
Argh, I misread his code. Sorry for that.
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