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

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Date:   Mon, 25 May 2020 17:59:06 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     "Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
Cc:     Ian Rogers <irogers@...gle.com>, Rik van Riel <riel@...hat.com>,
        linux-man@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        linux-mm@...ck.org, 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, 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.

-- 
 Kirill A. Shutemov