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Subject: Re: [dm-devel] AMD-Vi IO_PAGE_FAULTs and ata3.00: failed command:
 READ FPDMA QUEUED errors since Linux 4.0
To: device-mapper development <dm-devel@redhat.com>,
	Andreas Hartmann <andihartmann@freenet.de>
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Cc: linux-pci <linux-pci@vger.kernel.org>, mpatocka@redhat.com,
	Milan Broz <mbroz@redhat.com>,
	Mike Snitzer <msnitzer@redhat.com>
From: Ondrej Kozina <okozina@redhat.com>
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Date: Wed, 29 Jul 2015 08:17:41 +0200
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On 07/28/2015 11:24 PM, Mike Snitzer wrote:
>>
>> I am willing to do tests if you have any idea to be tested - I can
>> reproduce it quite easily.
>
> You can try disabling dm-crypt's parallelization by specifying these 2
> features: same_cpu_crypt submit_from_crypt_cpus
>

Hi,

please try adding follwoing cryptsetup perf. options while unlocking 
your LUKS containers: --perf-submit_from_crypt_cpus and 
--perf-same_cpu_crypt.

Perhaps focus on SSD disk as previous unresolved report mentioned SSD too

Regards
O.