Marvell 88SX6081 timeouts, particularly when running 'zfs scrub' with regular I/O

[Michael DeMan]

Hi All,

I've found a few posts around about this, but nothing conclusive.

We have been getting hit on this with two...
mvs0: <Marvell 88SX6081 SATA controller> port 0x9400-0x94ff mem 0xfc400000-0xfc4fffff irq 28 at device 1.0 on pci1
mvs1: <Marvell 88SX6081 SATA controller> port 0x9800-0x98ff mem 0xfc500000-0xfc5fffff irq 29 at device 3.0 on pci1
...controllers.

I went through and did a few things (an older Opteron 285 box) and disabled super-pages and permutations on other device.hints, loader.conf and live sysctl settings -  all to no avail.

I also found a few things via Google about being to patch from 9-CURRENT, but the idea with this box was to be able to re-purpose some older equipment for proof of concept using FreeNAS8.

It is possible for me to build a version of that with the patches, etc - but I figured it would be better to post to the list first and gather feedback since this is pretty old/clunky hardware and newer patches may or may not solve the problem.

Thanks,

- mike deman



Jul 19 16:46:41 freenas kernel: mvsch11: Timeout on slot 0
Jul 19 16:46:41 freenas kernel: mvsch11: iec 02000000 sstat 00000123 serr 00000000 edma_s 00001023 dma_c 00000000 dma_s 00000000 rs 00000201 status 40
Jul 19 16:46:41 freenas kernel: mvsch11:  ... waiting for slots 00000200
Jul 19 16:46:43 freenas kernel: mvsch4: Timeout on slot 4
Jul 19 16:46:43 freenas kernel: mvsch4: iec 02000000 sstat 00000123 serr 00000000 edma_s 00001022 dma_c 00000000 dma_s 00000000 rs 00000010 status 40
Jul 19 16:46:45 freenas kernel: mvsch1: Timeout on slot 0
Jul 19 16:46:45 freenas kernel: mvsch1: iec 02000000 sstat 00000123 serr 00000000 edma_s 00001101 dma_c 00000000 dma_s 00000000 rs 00000001 status 40
Jul 19 16:46:46 freenas kernel: mvsch11: Timeout on slot 9
Jul 19 16:46:46 freenas kernel: mvsch11: iec 02000000 sstat 00000123 serr 00000000 edma_s 00001023 dma_c 00000000 dma_s 00000000 rs 00000201 status 40
Jul 19 16:46:47 freenas root: ZFS: checksum mismatch, zpool=zpmir1 path=/dev/gpt/ada12 offset=52341838336 size=131072