linux-kernel - Re: [PATCH] proc.5: add "wf" to VmFlags in /proc/[pid]/smaps

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Message-ID: <CAKgNAkg8OG1gCvZcaAMYmwpd-_MPMis4kGfDRgZGgp3o_MxUag@mail.gmail.com>
Date:   Mon, 25 May 2020 20:50:13 +0200
From:   "Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
To:     "Kirill A. Shutemov" <kirill@...temov.name>
Cc:     Ian Rogers <irogers@...gle.com>, Rik van Riel <riel@...hat.com>,
        linux-man <linux-man@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>,
        Linux API <linux-api@...r.kernel.org>, nilal@...hat.com,
        Florian Weimer <fweimer@...hat.com>,
        Colm MacCártaigh <colm@...costs.net>,
        Mike Kravetz <mike.kravetz@...cle.com>
Subject: Re: [PATCH] proc.5: add "wf" to VmFlags in /proc/[pid]/smaps

On Mon, 25 May 2020 at 16:59, Kirill A. Shutemov <kirill@...temov.name> wrote:
>
> On Mon, May 25, 2020 at 03:50:38PM +0200, Michael Kerrisk (man-pages) wrote:
> > On 5/22/20 1:13 AM, Ian Rogers wrote:
> > > On Thu, May 21, 2020 at 3:25 PM Ian Rogers <irogers@...gle.com> wrote:
> > >>
> > >> This patch documents a flag added in the following kernel commit:
> > >>
> > >> commit d2cd9ede6e193dd7d88b6d27399e96229a551b19
> > >> Author: Rik van Riel <riel@...hat.com>
> > >> Date:   Wed Sep 6 16:25:15 2017 -0700
> > >>
> > >>     mm,fork: introduce MADV_WIPEONFORK
> > >>
> > >> This was already documented in man2/madvise.2 in the commit:
> > >>
> > >> commit c0c4f6c29c494c466f3a2a6273c5b55b76a72927
> > >> Author: Rik van Riel <riel@...hat.com>
> > >> Date:   Tue Sep 19 20:32:00 2017 +0200
> > >>
> > >>     madvise.2: Document MADV_WIPEONFORK and MADV_KEEPONFORK
> > >>
> > >> Signed-off-by: Ian Rogers <irogers@...gle.com>
> > >
> > > Doing a quick audit of fs/proc/task_mmu.c having noticed this flag was
> > > missing I note:
> > >  - "mp" isn't documented, only possible with INTEL_MPX
> > >  - "nl" is documented but not present in show_smap_vma_flags
> > >  - "um" and "uw" aren't documented
> >
> > I took a shot at fixing these:
> >
> >
> >              mp  - MPX-specific VMA (x86, since Linux 3.19)
>
> This one is gone. The patch to remove leftovers of MPX is linux-next.

Thanks, Kirill. I'll simply remove that entry.

Cheers,

Michael

-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/