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Date: Tue, 15 Nov 2016 14:49:32 +0100
From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@fb.com>
Cc: Omar Sandoval <osandov@osandov.com>, axboe@kernel.dk,
	linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	hch@infradead.org, Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH 1/3] block: fast-path for small and simple direct I/O
	requests
Message-ID: <20161115134932.GA28632@lst.de>
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On Mon, Nov 14, 2016 at 01:00:09PM -0700, Jens Axboe wrote:
> Prefetches like that tend to grow stale, in my experience. So we should
> probably just evaluate the new path cache behavior and see if it makes
> sense.

Yes.  I've tested the patches with that in place, but it didn't
make a difference.  Probably because we're not wasting many cycles
between the possible place for the prefetch and the use of it anyway.