On 07/28/2015 at 21:31 PM, Mike Snitzer wrote:
> On Tue, Jul 28 2015 at 3:23pm -0400,
Andreas Hartmann <andihartmann@xxxxxxxxxx> wrote:
On 07/28/2015 at 08:58 PM, Mike Snitzer wrote:
On Tue, Jul 28 2015 at 2:20pm -0400,
Andreas Hartmann <andihartmann@xxxxxxxxxx> wrote:
On 07/28/2015 at 07:50 PM, Mike Snitzer wrote:
[..]
Are your SATA devcies using NCQ?
Yes. It's enabled:
dmesg| grep -i ncq
ahci 0000:00:11.0: flags: 64bit ncq sntf ilck pm led clo pmp pio slum part
ata2.00: 5860533168 sectors, multi 0: LBA48 NCQ (depth 31/32), AA
ata3.00: 5860533168 sectors, multi 0: LBA48 NCQ (depth 31/32), AA
ata1.00: 468862128 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
As the errors already come up on boot (during mount of partitions or
even before the password for the disk has been provided): How can I
disable NCQ during boot of the kernel? Is there a kernel option?
See:
https://ata.wiki.kernel.org/index.php/Libata_FAQ#Enabling.2C_disabling_and_checking_NCQ
alternatively, and likely easier, set this on the kernel commandline:
libata.force=noncq
ata2.00: FORCE: horkage modified (noncq)
ata2.00: 5860533168 sectors, multi 0: LBA48 NCQ (not used)
ata3.00: FORCE: horkage modified (noncq)
ata3.00: 5860533168 sectors, multi 0: LBA48 NCQ (not used)
ata5.00: FORCE: horkage modified (noncq)
ata1.00: FORCE: horkage modified (noncq)
ata1.00: 468862128 sectors, multi 16: LBA48 NCQ (not used)
Perfectly. Seems to work w/ 3.19.8 and your mentioned patches. But now,
I'm getting another error, which I didn't see before w/ 3.x-kernels:
[drm:btc_dpm_set_power_state [radeon]] *ERROR*
rv770_restrict_performance_levels_before_switch failed
It seams that your patches do have some unwanted side effects :-).
That is a completely different issue. drm and radeon is a graphics
issue.
Nothing changed on radeon code. I just applied your patches. Nothing
more. Why should radeon been suddenly broken if I apply your patches to
a stable 3.19.8 code?
These patches trigger tons of AMD-Vi IO_PAGE_FAULTs w/ ncq enabled and
the IOMMU developers say, that it is not a problem of the iommu code.
Could you please reexamine your patch "dm crypt: don't allocate
pages for a partial request" - after applying this patch all the
problems are coming up here.
More likely than not your hardware isn't very good.
Maybe - maybe not. The only thing I know for sure, is: with these
patches applied, the machine doesn't work reliably any more. W/ ncq
disabled, the AMD-Vi IO_PAGE_FAULTs are gone, but a radeon error never
seen before came instead. Most probably chance. Most probably, it could
have been risen any other error, too.
I am willing to do tests if you have any idea to be tested - I can
reproduce it quite easily.
Thanks,
regards,
Andreas
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