Re: [PATCH 3/3] mm/devmap: Remove pgmap accounting in the get_user_pages_fast() path
Dan Williams <[email protected]>
| Newsgroups | org.01.lists.linux-nvdimm,dev.linux.lists.nvdimm,org.kernel.vger.linux-fsdevel,org.kernel.vger.linux-kernel,org.kvack.linux-mm |
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| Message-ID | <CAPcyv4hHHFD4cvdRmajWgYbXU5-o-jF-o6D5ud-rg4dWNqt5Ag@mail.gmail.com> |
On Thu, Mar 25, 2021 at 7:34 AM Jason Gunthorpe <[email protected]> wrote: > > On Thu, Mar 18, 2021 at 10:03:06AM -0700, Dan Williams wrote: > > Yes. I still need to answer the question of whether mapping > > invalidation triggers longterm pin holders to relinquish their hold, > > but that's a problem regardless of whether gup-fast is supported or > > not. > > It does not, GUP users do not interact with addres_space or mmu > notifiers > Ok, but the SIGKILL from the memory_failure() will drop the pin? Can memory_failure() find the right processes to kill if the memory registration has been passed by SCM_RIGHTS? _______________________________________________ Linux-nvdimm mailing list -- [email protected] To unsubscribe send an email to [email protected]