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From: Peter Zijlstra <peterz@infradead.org>
To: john.hubbard@gmail.com
Cc: "Andrew Morton" <akpm@linux-foundation.org>,
	"Christoph Hellwig" <hch@infradead.org>,
	"Dan Williams" <dan.j.williams@intel.com>,
	"Dave Chinner" <david@fromorbit.com>,
	"Dave Hansen" <dave.hansen@linux.intel.com>,
	"Ira Weiny" <ira.weiny@intel.com>, "Jan Kara" <jack@suse.cz>,
	"Jason Gunthorpe" <jgg@ziepe.ca>,
	"Jérôme Glisse" <jglisse@redhat.com>,
	LKML <linux-kernel@vger.kernel.org>,
	amd-gfx@lists.freedesktop.org, ceph-devel@vger.kernel.org,
	devel@driverdev.osuosl.org, devel@lists.orangefs.org,
	dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
	kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-block@vger.kernel.org, linux-crypto@vger.kernel.org,
	linux-fbdev@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-media@vger.kernel.org, linux-mm@kvack.org,
	linux-nfs@vger.kernel.org, linux-rdma@vger.kernel.org,
	linux-rpi-kernel@lists.infradead.org, linux-xfs@vger.kernel.org,
	netdev@vger.kernel.org, rds-devel@oss.oracle.com,
	sparclinux@vger.kernel.org, x86@kernel.org,
	xen-devel@lists.xenproject.org,
	"John Hubbard" <jhubbard@nvidia.com>
Subject: Re: [PATCH 00/34] put_user_pages(): miscellaneous call sites
Date: Fri, 2 Aug 2019 10:05:54 +0200	[thread overview]
Message-ID: <20190802080554.GD2332@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20190802021653.4882-1-jhubbard@nvidia.com>

On Thu, Aug 01, 2019 at 07:16:19PM -0700, john.hubbard@gmail.com wrote:

> This is part a tree-wide conversion, as described in commit fc1d8e7cca2d
> ("mm: introduce put_user_page*(), placeholder versions"). That commit
> has an extensive description of the problem and the planned steps to
> solve it, but the highlites are:

That is one horridly mangled Changelog there :-/ It looks like it's
partially duplicated.

Anyway; no objections to any of that, but I just wanted to mention that
there are other problems with long term pinning that haven't been
mentioned, notably they inhibit compaction.

A long time ago I proposed an interface to mark pages as pinned, such
that we could run compaction before we actually did the pinning.

  parent reply	other threads:[~2019-08-02  8:07 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-02  2:16 [PATCH 00/34] put_user_pages(): miscellaneous call sites john.hubbard
2019-08-02  2:16 ` [PATCH 01/34] mm/gup: add make_dirty arg to put_user_pages_dirty_lock() john.hubbard
2019-08-02  2:16 ` [PATCH 02/34] net/rds: convert put_page() to put_user_page*() john.hubbard
2019-08-02  2:39 ` [PATCH 00/34] put_user_pages(): miscellaneous call sites John Hubbard
2019-08-02  8:05 ` Peter Zijlstra [this message]
2019-08-02 19:33   ` John Hubbard
2019-08-02  2:19 john.hubbard
2019-08-02  9:12 ` Michal Hocko
2019-08-02 12:41   ` Jan Kara
2019-08-02 14:24     ` Matthew Wilcox
2019-08-02 14:52       ` Jan Kara
2019-08-02 19:14         ` John Hubbard
2019-08-07  8:37           ` Jan Kara
2019-08-07  8:46             ` Michal Hocko
2019-08-08  2:36               ` Ira Weiny
2019-08-08  3:46                 ` John Hubbard
2019-08-08 16:25                   ` Weiny, Ira
2019-08-08 18:18                     ` John Hubbard
2019-08-09  8:34                 ` Jan Kara

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