[dm-devel] AMD-Vi IO_PAGE_FAULTs and ata3.00: failed command: READ FPDMA QUEUED errors since Linux 4.0

[Mike Snitzer]

On Tue, Jul 28 2015 at  1:40pm -0400,
Andreas Hartmann <andihartmann at 01019freenet.de> wrote:

> Hello!
> 
> After long and heavy bisecting, I found this commit
> "dm crypt: don't allocate pages for a partial request" [1] being the
> cause of the ata errors and AMD-Vi IO_PAGE_FAULTs.
> 
> That's the bisect I did with Linus' repository
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/
> 
> 
> git bisect start
> # good: [3466b547e37b988723dc93465b7cb06b4b1f731f] Merge branches 'pnp',
> 'pm-cpuidle' and 'pm-cpufreq'
> git bisect good 3466b547e37b988723dc93465b7cb06b4b1f731f
> # bad: [cd50b70ccd5c87794ec28bfb87b7fba9961eb0ae] Merge tag
> 'pm+acpi-3.20-rc1-3' of
> git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
> git bisect bad cd50b70ccd5c87794ec28bfb87b7fba9961eb0ae
> # good: [27a22ee4c7d5839fd7e3e441c9d675c8a5c4c22c] Merge branch 'kbuild'
> of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
> git bisect good 27a22ee4c7d5839fd7e3e441c9d675c8a5c4c22c
> # good: [c189cb8ef62832f33b6cf757350a0270532a1ad8] Merge tag
> 'vfio-v3.20-rc1' of git://github.com/awilliam/linux-vfio
> git bisect good c189cb8ef62832f33b6cf757350a0270532a1ad8
> # good: [295324556c427d60b41668ab81a43f604533f456] Merge branch
> 'i2c/for-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
> git bisect good 295324556c427d60b41668ab81a43f604533f456
> # good: [1acd2de5facd7fbea499aea64a3a3d0ec7bb9b51] Merge branch
> 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
> git bisect good 1acd2de5facd7fbea499aea64a3a3d0ec7bb9b51
> # good: [fde9f50f80fe89a9115b4bfa773017272597d85d] target: Add sanity
> checks for DPO/FUA bit usage
> 
> git bisect good fde9f50f80fe89a9115b4bfa773017272597d85d
> 
> 
> # bad: [22aa66a3ee5b61e0f4a0bfeabcaa567861109ec3] dm snapshot: fix a
> possible invalid memory access on unload
> 
> 
> git bisect bad 22aa66a3ee5b61e0f4a0bfeabcaa567861109ec3
> 
> 
> # bad: [7145c241a1bf2841952c3e297c4080b357b3e52d] dm crypt: avoid
> deadlock in mempools
> 
> 
> git bisect bad 7145c241a1bf2841952c3e297c4080b357b3e52d
> 
> 
> # good: [37527b869207ad4c208b1e13967d69b8bba1fbf9] dm io: reject
> unsupported DISCARD requests with EOPNOTSUPP
> 
> 
> git bisect good 37527b869207ad4c208b1e13967d69b8bba1fbf9
> 
> 
> # bad: [cf2f1abfbd0dba701f7f16ef619e4d2485de3366] dm crypt: don't
> allocate pages for a partial request
> 
> 
> git bisect bad cf2f1abfbd0dba701f7f16ef619e4d2485de3366
> 
> 
> # good: [f3396c58fd8442850e759843457d78b6ec3a9589] dm crypt: use unbound
> workqueue for request processing
> 
> git bisect good f3396c58fd8442850e759843457d78b6ec3a9589
> 
> 
> # first bad commit: [cf2f1abfbd0dba701f7f16ef619e4d2485de3366] dm crypt:
> don't allocate pages for a partial request
> 
> 
> How can I verify (e.g. w/ a patch to Linux 4.0.9) if this patch is
> really the culprit?
> 
> I'm heavily relying upon encryption:
> 
> There are 3 disks:
> - One 240 GB SSD (crypted LVM, swap and boot partition)
> - Two SATA rotational 3 TB disks (WD ST3000DM001-1CH166, encrypted raid
>   /dev/md0, LVM)
> - All in all 29 logical volumes with xfs as filesystem (besides swap
>   and bootpartition - the latter is ext4).
> 
> The system is based on an AMD FX8350 processor (8 core) w/ 24GB RAM.
> Motherboard is a Gigabyte GA-990XA-UD3. You can find a complete dmesg
> output here [2].
> 
> 
> 
> I would be glad to get some assistance!

Are your SATA devcies using NCQ?

Please see this dm-devl thread (and this post in particular):
https://www.redhat.com/archives/dm-devel/2015-June/msg00005.html