Messages in this thread | | | Date | Sun, 28 Nov 2021 04:10:01 +0000 | From | Matthew Wilcox <> | Subject | Re: [PATCH v7] mm: Add PM_THP_MAPPED to /proc/pid/pagemap |
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On Mon, Nov 22, 2021 at 04:01:02PM -0800, Mina Almasry wrote: > Add PM_THP_MAPPED MAPPING to allow userspace to detect whether a given virt > address is currently mapped by a transparent huge page or not. Example > use case is a process requesting THPs from the kernel (via a huge tmpfs > mount for example), for a performance critical region of memory. The > userspace may want to query whether the kernel is actually backing this > memory by hugepages or not.
But what is userspace going to _do_ differently if the kernel hasn't backed the memory with huge pages?
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