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Date:   Wed, 10 Feb 2021 08:41:55 +0000
From:   Mel Gorman <mgorman@techsingularity.net>
To:     Jesper Dangaard Brouer <brouer@redhat.com>
Cc:     Chuck Lever <chuck.lever@oracle.com>,
        "mgorman@suse.de" <mgorman@suse.de>,
        Linux NFS Mailing List <linux-nfs@vger.kernel.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: alloc_pages_bulk()
Message-ID: <20210210084155.GA3697@techsingularity.net>
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On Tue, Feb 09, 2021 at 11:31:08AM +0100, Jesper Dangaard Brouer wrote:
> > > Neil Brown pointed me to this old thread:
> > > 
> > > https://lore.kernel.org/lkml/20170109163518.6001-1-mgorman@techsingularity.net/
> > > 
> > > We see that many of the prerequisites are in v5.11-rc, but
> > > alloc_page_bulk() is not. I tried forward-porting 4/4 in that
> > > series, but enough internal APIs have changed since 2017 that
> > > the patch does not come close to applying and compiling.
> 
> I forgot that this was never merged.  It is sad as Mel showed huge
> improvement with his work.
> 
> > > I'm wondering:
> > > 
> > > a) is there a newer version of that work?
> > > 
> 
> Mel, why was this work never merged upstream?
> 

Lack of realistic consumers to drive it forward, finalise the API and
confirm it was working as expected. It eventually died as a result. If it
was reintroduced, it would need to be forward ported and then implement
at least one user on top.

-- 
Mel Gorman
SUSE Labs