On Sun, 2 Aug 2015, Andreas Hartmann wrote: > On 08/01/2015 at 04:20 PM Andreas Hartmann wrote: > > On 07/28/2015 at 09:29 PM, Mike Snitzer wrote: > > [...] > >> Mikulas was saying to biect what is causing ATA to fail. > > > > Some good news and some bad news. The good news first: > > > > Your patchset > > > > f3396c58fd8442850e759843457d78b6ec3a9589, > > cf2f1abfbd0dba701f7f16ef619e4d2485de3366, > > 7145c241a1bf2841952c3e297c4080b357b3e52d, > > 94f5e0243c48aa01441c987743dc468e2d6eaca2, > > dc2676210c425ee8e5cb1bec5bc84d004ddf4179, > > 0f5d8e6ee758f7023e4353cca75d785b2d4f6abe, > > b3c5fd3052492f1b8d060799d4f18be5a5438add > > > > seems to work fine w/ 3.18.19 !! > > > > Why did I test it with 3.18.x now? Because I suddenly got two ata errors > > (ata1 and ata2) with clean 3.19.8 (w/o the AMD-Vi IO_PAGE_FAULTs) during > > normal operation. This means: 3.19 must already be broken, too. > > > > Therefore, I applied your patchset to 3.18.x and it seems to work like a > > charme - I don't get any AMD-Vi IO_PAGE_FAULTs on boot and no ata errors > > (until now). > > > > > > Next I did: I tried to bisect between 3.18 and 3.19 with your patchset > > applied, because w/ this patchset applied, the problem can be seen > > easily and directly on boot. Unfortunately, this does work only a few > > git bisect rounds until I got stuck because of interferences with your > > extra patches applied: > > [Resolved the problems written at the last post.] > > Bisecting ended here: > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=34b48db66e08ca1c1bc07cf305d672ac940268dc > > block: remove artifical max_hw_sectors cap > > > Removing this patch on 3.19 and 4.1 make things working again. Didn't > test 4.0, but I think it's the same. No more AMD-Vi IO_PAGE_FAULTS with > that patch reverted. > > > Please check why this patch triggers AMD-Vi IO_PAGE_FAULTS. > > > Thanks, > kind regards, > Andreas Hartmann I would submit this bug to maintainers of AMD-Vi. They understand the hardware, so they should tell why do large I/O requests result in IO_PAGE_FAULTs. It is probably bug either in AMD-Vi driver or in hardware. Mikulas -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
