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Date: Sun, 17 Sep 2017 18:52:46 -0700 From: Jann Horn <jannh@...gle.com> To: Mike Kravetz <mike.kravetz@...cle.com> Cc: Michael Kerrisk-manpages <mtk.manpages@...il.com>, linux-man@...r.kernel.org, kernel list <linux-kernel@...r.kernel.org>, Linux API <linux-api@...r.kernel.org>, Michal Hocko <mhocko@...e.com>, Andrea Arcangeli <aarcange@...hat.com>, "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>, Vlastimil Babka <vbabka@...e.cz>, Anshuman Khandual <khandual@...ux.vnet.ibm.com>, linux-mm@...ck.org Subject: Re: [patch] mremap.2: Add description of old_size == 0 functionality On Fri, Sep 15, 2017 at 2:37 PM, Mike Kravetz <mike.kravetz@...cle.com> wrote: [...] > A recent change was made to mremap so that an attempt to create a > duplicate a private mapping will fail. > > commit dba58d3b8c5045ad89c1c95d33d01451e3964db7 > Author: Mike Kravetz <mike.kravetz@...cle.com> > Date: Wed Sep 6 16:20:55 2017 -0700 > > mm/mremap: fail map duplication attempts for private mappings > > This return code is also documented here. [...] > diff --git a/man2/mremap.2 b/man2/mremap.2 [...] > @@ -174,7 +189,12 @@ and > or > .B MREMAP_FIXED > was specified without also specifying > -.BR MREMAP_MAYMOVE . > +.BR MREMAP_MAYMOVE ; > +or \fIold_size\fP was zero and \fIold_address\fP does not refer to a > +private anonymous mapping; Shouldn't this be the other way around? "or old_size was zero and old_address refers to a private anonymous mapping"?
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