linux-kernel - Re: [PATCH 2/4] mm: introduce put_user

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Message-ID: <20181003162237.GH24030@quack2.suse.cz>
Date:   Wed, 3 Oct 2018 18:22:37 +0200
From:   Jan Kara <jack@...e.cz>
To:     john.hubbard@...il.com
Cc:     Matthew Wilcox <willy@...radead.org>,
        Michal Hocko <mhocko@...nel.org>,
        Christopher Lameter <cl@...ux.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Dan Williams <dan.j.williams@...el.com>,
        Jan Kara <jack@...e.cz>, Al Viro <viro@...iv.linux.org.uk>,
        linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>,
        linux-rdma <linux-rdma@...r.kernel.org>,
        linux-fsdevel@...r.kernel.org, John Hubbard <jhubbard@...dia.com>
Subject: Re: [PATCH 2/4] mm: introduce put_user_page(), placeholder version

On Thu 27-09-18 22:39:48, john.hubbard@...il.com wrote:
> From: John Hubbard <jhubbard@...dia.com>
> 
> Introduces put_user_page(), which simply calls put_page().
> This provides a way to update all get_user_pages*() callers,
> so that they call put_user_page(), instead of put_page().
> 
> Also adds release_user_pages(), a drop-in replacement for
> release_pages(). This is intended to be easily grep-able,
> for later performance improvements, since release_user_pages
> is not batched like release_pages() is, and is significantly
> slower.

A small nit but can we maybe call this put_user_pages() for symmetry with
put_user_page()? I don't really care too much but it would look natural to
me.

								Honza

-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR