linux-kernel - block I/O accounting improvements v2

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Message-Id: <20200527052419.403583-1-hch@lst.de>
Date:   Wed, 27 May 2020 07:24:03 +0200
From:   Christoph Hellwig <hch@....de>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
        Minchan Kim <minchan@...nel.org>,
        Nitin Gupta <ngupta@...are.org>, dm-devel@...hat.com,
        linux-block@...r.kernel.org, drbd-dev@...ts.linbit.com,
        linux-bcache@...r.kernel.org, linux-nvdimm@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: block I/O accounting improvements v2

Hi Jens,

they series contains various improvement for block I/O accounting.  The
first bunch of patches switch the bio based drivers to better accounting
helpers compared to the current mess.  The end contains a fix and various
performanc improvements.  Most of this comes from a series Konstantin
sent a few weeks ago, rebased on changes that landed in your tree since
and my change to always use the percpu version of the disk stats.

Changes since v1:
 - add an ifdef CONFIG_BLOCK to work around the sad state of our headers
 - add reviewed-by tags to all patches