Thread (62 messages) 62 messages, 11 authors, 2020-09-15

Re: [RFC PATCH v2 1/3] mm/gup: fix gup_fast with dynamic page table folding

From: Jason Gunthorpe <jgg@ziepe.ca>
Date: 2020-09-10 17:21:07
Also in: linux-arch, linux-mm, linux-s390, linux-um, linuxppc-dev, lkml, sparclinux

On Thu, Sep 10, 2020 at 07:07:57PM +0200, Gerald Schaefer wrote:
I might have lost track a bit. Are we still talking about possible
functional impacts of either our current pagetable walking with s390
(apart from gup_fast), or the proposed generic change (for s390, or
others?)?
I'm looking for an more understandable explanation what is wrong with
the S390 implementation.

If the page operations require the invariant I described then it is
quite easy to explain the problem and understand the solution.

Jason

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