Re: [PATCH] mtip32xx: avoid to read HOST_CAP from HW in .queue_rq()
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To
: Ming Lei <ming.lei@xxxxxxxxxx>
Subject
: Re: [PATCH] mtip32xx: avoid to read HOST_CAP from HW in .queue_rq()
From
: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date
: Wed, 5 Jul 2017 11:01:46 -0700
Cc
: Jens Axboe <axboe@xxxxxx>, linux-block@xxxxxxxxxxxxxxx, Christoph Hellwig <hch@xxxxxxxxxxxxx>
In-reply-to
: <
20170705041427.9887-1-ming.lei@redhat.com
>
User-agent
: Mutt/1.8.0 (2017-02-23)
mmio reads in the fast path are always a bad idea.. Reviewed-by: Christoph Hellwig <hch@xxxxxx>
References
:
[PATCH] mtip32xx: avoid to read HOST_CAP from HW in .queue_rq()
From:
Ming Lei
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