linux-kernel - Re: [RFC PATCH 27/37] mm: implement speculative handling in do_fault

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Message-ID: <20210407023748.GY2531743@casper.infradead.org>
Date:   Wed, 7 Apr 2021 03:37:48 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Michel Lespinasse <michel@...pinasse.org>
Cc:     Linux-MM <linux-mm@...ck.org>,
        Laurent Dufour <ldufour@...ux.ibm.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Michal Hocko <mhocko@...e.com>,
        Rik van Riel <riel@...riel.com>,
        Paul McKenney <paulmck@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Joel Fernandes <joelaf@...gle.com>,
        Rom Lemarchand <romlem@...gle.com>,
        Linux-Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 27/37] mm: implement speculative handling in
 do_fault_around()

On Tue, Apr 06, 2021 at 06:44:52PM -0700, Michel Lespinasse wrote:
> Change xfs_filemap_map_pages() account for the fact that it can not
> block anymore, as it is now running within an rcu read lock.

Better to just delete xfs_filemap_map_pages() and use filemap_map_pages
directly.