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Date: Thu, 20 Dec 2018 20:31:27 +0000
From: Mel Gorman <mgorman@techsingularity.net>
Subject: Re: [PATCH 06/14] mm, migrate: Immediately fail migration of a page
 with no migration handler
Message-ID: <20181220203127.GB31517@techsingularity.net>
References: <20181214230310.572-1-mgorman@techsingularity.net>
 <20181214230310.572-7-mgorman@techsingularity.net>
 <CAHbLzko6jXSikw-4LQXi6KfNR9=U4XJnB_OaaZ4XcNHUj4NLUQ@mail.gmail.com>
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To: Yang Shi <shy828301@gmail.com>
Cc: Linux MM <linux-mm@kvack.org>, David Rientjes <rientjes@google.com>, Andrea Arcangeli <aarcange@redhat.com>, torvalds@linux-foundation.org, Michal Hocko <mhocko@kernel.org>, Huang Ying <ying.huang@intel.com>, "Kirill A. Shutemov" <kirill@shutemov.name>, Andrew Morton <akpm@linux-foundation.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>

On Thu, Dec 20, 2018 at 11:44:57AM -0800, Yang Shi wrote:
> On Fri, Dec 14, 2018 at 3:03 PM Mel Gorman <mgorman@techsingularity.net> wrote:
> >
> > Pages with no migration handler use a fallback hander which sometimes
> > works and sometimes persistently fails such as blockdev pages. Migration
> 
> A minor correction. The above statement sounds not accurate anymore
> since Jan Kara had patch series (blkdev: avoid migration stalls for
> blkdev pages) have blockdev use its own migration handler.
> 

I'm aware given that I reviewed that series. The statement was correct
at the time of writing. I'll alter the example when rebased on top of
Jan's work.

-- 
Mel Gorman
SUSE Labs