On 2015-05-01 (Fri) at 19:42:15 -0400, Abelardo Ricart III wrote: > > > The patchset in question was tested quite heavily so this is a > > > surprising report. I'm noticing you are opting in to dm-crypt discard > > > support. Have you tested without discards enabled? > > > > I've disabled discards universally and rebuilt a vanilla kernel. After running > > my heavy read-write-sync scripts, everything seems to be working fine now. I > > suppose this could be something that used to fail silently before, but now > > produces bad behavior? I seem to remember having something in my message log > > about "discards not supported on this device" when running with it enabled > > before. > > Forgive me, but I spoke too soon. The corruption and libata errors are still > there, as was evidenced when I went to reboot and got treated to an eye full of > "read-only filesystem" and ata errors. > > So no, disabling discards unfortunately did nothing to help. I've been experiencing the same problem. Vanilla 4.0 series kernels, dm-crypt, with/or without discards, on a ThinkPad X1 Carbon with a LiteOn LGT-256M6G SSD. After some of googling around, I found some chatter relating to changes in NCQ on SSDs in 4.0. Been running w/o NCQ for a full kernel build so far without issue. Perhaps there's been some change in the interaction between dm-crypt and NCQ? Abelardo, can you try w/o NCQ and see if that helps your situation? Best, --Brandon -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
