linux-kernel - Re: [PATCH] mm/gup: fix omission of check on FOLL_LONGTERM in get_user_pages

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Message-ID: <20190531171336.GA30649@iweiny-DESK2.sc.intel.com>
Date:   Fri, 31 May 2019 10:13:37 -0700
From:   Ira Weiny <ira.weiny@...el.com>
To:     Pingfan Liu <kernelfans@...il.com>
Cc:     John Hubbard <jhubbard@...dia.com>, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Matthew Wilcox <willy@...radead.org>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
        Keith Busch <keith.busch@...el.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm/gup: fix omission of check on FOLL_LONGTERM in
 get_user_pages_fast()

On Fri, May 31, 2019 at 07:05:27PM +0800, Pingfan Liu wrote:
> On Fri, May 31, 2019 at 7:21 AM John Hubbard <jhubbard@...dia.com> wrote:
> >
> >
> > Rather lightly tested...I've compile-tested with CONFIG_CMA and !CONFIG_CMA,
> > and boot tested with CONFIG_CMA, but could use a second set of eyes on whether
> > I've added any off-by-one errors, or worse. :)
> >
> Do you mind I send V2 based on your above patch? Anyway, it is a simple bug fix.

FWIW please split out the nr_pinned change to a separate patch.

Thanks,
Ira