On 07/28/2015 at 07:50 PM Mike Snitzer wrote: > On Tue, Jul 28 2015 at 1:40pm -0400, > Andreas Hartmann <andihartmann@xxxxxxxxxxxxxxx> 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 As suggested, I applied these commits f3396c58fd8442850e759843457d78b6ec3a9589, cf2f1abfbd0dba701f7f16ef619e4d2485de3366, 7145c241a1bf2841952c3e297c4080b357b3e52d, 94f5e0243c48aa01441c987743dc468e2d6eaca2, dc2676210c425ee8e5cb1bec5bc84d004ddf4179, 0f5d8e6ee758f7023e4353cca75d785b2d4f6abe, b3c5fd3052492f1b8d060799d4f18be5a5438add to 3.19.8 and the problem is exactly the same as described above. I don't think that the problem is SSD related, because the ata3 error I can see belongs to the rotational disk (ata1 would be the SSD). The git bisect you mentioned is already done: "dm crypt: don't allocate pages for a partial request" is the culprit. Besides that: How can I disable ncq? Maybe a kernel patch, which prevents enabling it because I need it on bootup before the disks are accessed. Thanks, Andreas -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
