From: Dan Williams <dan.j.williams@intel.com>
To: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Joao Martins <joao.m.martins@oracle.com>,
Christoph Hellwig <hch@lst.de>,
Shiyang Ruan <ruansy.fnst@fujitsu.com>,
Vishal Verma <vishal.l.verma@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Ira Weiny <ira.weiny@intel.com>,
Matthew Wilcox <willy@infradead.org>, Jan Kara <jack@suse.cz>,
Andrew Morton <akpm@linux-foundation.org>,
david <david@fromorbit.com>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux MM <linux-mm@kvack.org>,
linux-nvdimm <linux-nvdimm@lists.01.org>
Subject: Re: [PATCH 3/3] mm/devmap: Remove pgmap accounting in the get_user_pages_fast() path
Date: Mon, 29 Mar 2021 16:24:19 -0700 [thread overview]
Message-ID: <CAPcyv4hHHFD4cvdRmajWgYbXU5-o-jF-o6D5ud-rg4dWNqt5Ag@mail.gmail.com> (raw)
In-Reply-To: <20210325143419.GK2710221@ziepe.ca>
On Thu, Mar 25, 2021 at 7:34 AM Jason Gunthorpe <jgg@ziepe.ca> 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?
next prev parent reply other threads:[~2021-03-29 23:25 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-18 4:08 [PATCH 0/3] mm, pmem: Force unmap pmem on surprise remove Dan Williams
2021-03-18 4:08 ` [PATCH 1/3] mm/memory-failure: Prepare for mass memory_failure() Dan Williams
2021-03-18 4:08 ` [PATCH 2/3] mm, dax, pmem: Introduce dev_pagemap_failure() Dan Williams
2021-03-18 4:45 ` Darrick J. Wong
2021-03-18 19:26 ` Dan Williams
2021-03-18 4:57 ` Dave Chinner
2021-03-18 19:20 ` Dan Williams
2021-03-20 1:46 ` Dave Chinner
2021-03-20 2:39 ` Dan Williams
2021-03-18 4:08 ` [PATCH 3/3] mm/devmap: Remove pgmap accounting in the get_user_pages_fast() path Dan Williams
2021-03-18 10:00 ` Joao Martins
2021-03-18 17:03 ` Dan Williams
2021-03-25 14:34 ` Jason Gunthorpe
2021-03-29 23:24 ` Dan Williams [this message]
2021-03-30 13:49 ` Jason Gunthorpe
2021-03-24 17:45 ` Dan Williams
2021-03-24 19:00 ` Joao Martins
2021-04-01 19:54 ` Joao Martins
2021-03-25 14:37 ` Jason Gunthorpe
2021-03-25 13:02 ` [PATCH 0/3] mm, pmem: Force unmap pmem on surprise remove David Hildenbrand
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