linux-ext4 - Re: [PATCH 1/3] mm: add vm_insert_mixed

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Date:   Sun, 11 Jun 2017 22:02:36 -0600
From:   Ross Zwisler <ross.zwisler@...ux.intel.com>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-xfs@...r.kernel.org, Theodore Ts'o <tytso@....edu>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        Jonathan Corbet <corbet@....net>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-doc@...r.kernel.org, linux-mm <linux-mm@...ck.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Ingo Molnar <mingo@...hat.com>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Jan Kara <jack@...e.cz>,
        ext4 hackers <linux-ext4@...r.kernel.org>,
        Christoph Hellwig <hch@....de>,
        "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>
Subject: Re: [PATCH 1/3] mm: add vm_insert_mixed_mkwrite()

On Fri, Jun 09, 2017 at 08:35:08PM -0700, Dan Williams wrote:
> On Fri, Jun 9, 2017 at 8:03 PM, Ross Zwisler
> <ross.zwisler@...ux.intel.com> wrote:
> > And vm_insert_mixed_mkwrite() and vm_insert_mixed() are redundant with only
> > the insert_pfn() line differing?  This doesn't seem better...unless I'm
> > missing something?
> >
> > The way it is, vm_insert_mixed_mkwrite() also closely matches
> > insert_pfn_pmd(), which we use in the PMD case and which also takes a 'write'
> > boolean which works the same as our newly added 'mkwrite'.
> 
> Hmm, but now the pfn and pmd cases are inconsistent, if you put the
> flag name in the function then don't add an argument, or make it like
> the pmd case and add an argument to vm_insert_mixed(). I prefer the
> former.

Okay, I'll fix this for v2.  Thanks for the review.