linux-kernel - Re: switch the block layer to use kmap_local

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Message-ID: <eba0b98f-5b0e-32c4-3b09-fa1946192517@kernel.dk>
Date:   Tue, 27 Jul 2021 19:31:30 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Christoph Hellwig <hch@....de>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Geoff Levand <geoff@...radead.org>,
        Ilya Dryomov <idryomov@...il.com>,
        Dongsheng Yang <dongsheng.yang@...ystack.cn>,
        Mike Snitzer <snitzer@...hat.com>,
        "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
        Ira Weiny <ira.weiny@...el.com>, dm-devel@...hat.com,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-block@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        ceph-devel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: switch the block layer to use kmap_local_page v3

On 7/26/21 11:56 PM, Christoph Hellwig wrote:
> Hi all,
> 
> this series switches the core block layer code and all users of the
> existing bvec kmap helpers to use kmap_local_page.  Drivers that
> currently use open coded kmap_atomic calls will converted in a follow
> on series.
> 
> To do so a new kunmap variant is added that calls
> flush_kernel_dcache_page.  I'm not entirely sure where to call
> flush_dcache_page vs flush_kernel_dcache_page, so I've tried to follow
> the documentation here, but additional feedback would be welcome.
> 
> Note that the ps3disk has a minir conflict with the
> flush_kernel_dcache_page removal in linux-next through the -mm tree.
> I had hoped that change would go into 5.14, but it seems like it is
> being held for 5.15.

Applied for 5.15, thanks.

-- 
Jens Axboe