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From: Christopher Lameter <cl@linux.com>
To: Davidlohr Bueso <dave@stgolabs.net>
Cc: akpm@linux-foundation.org, dledford@redhat.com, jgg@mellanox.com,
	jack@suse.de, ira.weiny@intel.com, linux-rdma@vger.kernel.org,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Davidlohr Bueso <dbueso@suse.de>
Subject: Re: [PATCH 6/6] drivers/IB,core: reduce scope of mmap_sem
Date: Mon, 21 Jan 2019 21:53:24 +0000	[thread overview]
Message-ID: <01000168726760d6-6c4f2b48-870e-4a46-846b-3bb3d324000d-000000@email.amazonses.com> (raw)
In-Reply-To: <20190121174220.10583-7-dave@stgolabs.net>

On Mon, 21 Jan 2019, Davidlohr Bueso wrote:

> ib_umem_get() uses gup_longterm() and relies on the lock to
> stabilze the vma_list, so we cannot really get rid of mmap_sem
> altogether, but now that the counter is atomic, we can get of
> some complexity that mmap_sem brings with only pinned_vm.

Reviewd-by: Christoph Lameter <cl@linux.com>

  parent reply	other threads:[~2019-01-21 21:53 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-21 17:42 [PATCH v2 -next 0/6] mm: make pinned_vm atomic and simplify users Davidlohr Bueso
2019-01-21 17:42 ` [PATCH 1/6] mm: make mm->pinned_vm an atomic64 counter Davidlohr Bueso
2019-01-21 21:51   ` Christopher Lameter
2019-01-21 21:51     ` Christopher Lameter
2019-01-22  9:56   ` Jan Kara
2019-01-22 15:45   ` Daniel Jordan
2019-01-23 18:33   ` Jason Gunthorpe
2019-01-28 21:10     ` Andrew Morton
2019-01-21 17:42 ` [PATCH 2/6] mic/scif: do not use mmap_sem Davidlohr Bueso
2019-01-21 17:42 ` [PATCH 3/6] drivers/IB,qib: " Davidlohr Bueso
2019-01-28 23:31   ` Jason Gunthorpe
2019-01-29  4:46     ` Jason Gunthorpe
2019-01-29 14:14       ` Davidlohr Bueso
2019-01-29 18:50       ` Ira Weiny
2019-01-29 23:19         ` Jason Gunthorpe
2019-01-30 18:01           ` Weiny, Ira
2019-01-31 10:04             ` Jan Kara
2019-01-21 17:42 ` [PATCH 4/6] drivers/IB,hfi1: do not se mmap_sem Davidlohr Bueso
2019-01-21 17:42 ` [PATCH 5/6] drivers/IB,usnic: reduce scope of mmap_sem Davidlohr Bueso
2019-01-21 17:42 ` [PATCH 6/6] drivers/IB,core: " Davidlohr Bueso
2019-01-21 18:32   ` Jason Gunthorpe
2019-01-21 19:12     ` Davidlohr Bueso
2019-01-21 21:53   ` Christopher Lameter [this message]
2019-01-21 21:53     ` Christopher Lameter
  -- strict thread matches above, loose matches on Subject: below --
2019-02-06 17:59 [PATCH v3 0/6] mm: make pinned_vm atomic and simplify users Davidlohr Bueso
2019-02-06 17:59 ` [PATCH 6/6] drivers/IB,core: reduce scope of mmap_sem Davidlohr Bueso
2019-01-15 18:12 [PATCH -next 0/6] mm: make pinned_vm atomic and simplify users Davidlohr Bueso
2019-01-15 18:13 ` [PATCH 6/6] drivers/IB,core: reduce scope of mmap_sem Davidlohr Bueso
2019-01-15 20:30   ` Ira Weiny
2019-01-15 20:53   ` Jason Gunthorpe
2019-01-15 21:12     ` Matthew Wilcox
2019-01-15 21:17       ` Jason Gunthorpe
2019-01-16 16:00         ` Davidlohr Bueso
2019-01-16 17:02           ` Jason Gunthorpe
2019-01-16 17:06             ` Matthew Wilcox
2019-01-16 17:29               ` Jason Gunthorpe

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