From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@lst.de>
Subject: Re: raid5-cache I/O path improvements
Date: Tue, 8 Sep 2015 17:40:06 +0200
Message-ID: <20150908154006.GA2795@lst.de>
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To: Tejun Heo <tj@kernel.org>
Cc: Shaohua Li <shli@fb.com>, neilb@suse.de, linux-raid@vger.kernel.org, Kernel-team@fb.com, dan.j.williams@intel.com, "Martin K. Petersen" <martin.petersen@oracle.com>, linux-ide@vger.kernel.org
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On Tue, Sep 08, 2015 at 11:25:46AM -0400, Tejun Heo wrote:
> IIRC, some controllers and/or controllers were choking on it and it
> didn't make any noticeable difference on rotating disks.  Maybe we can
> try again with controller white list and enabling by default on SSds.

I guess we could start with AHCI only as a good approximation for a not
too crappy controller and driver.