Messages in this thread | | | Date | Fri, 2 Aug 2019 10:05:54 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 00/34] put_user_pages(): miscellaneous call sites |
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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.
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