On May 15, 2013, Josef Bacik <jbacik@xxxxxxxxxxxx> wrote: > So this should only happen in the case that you are on a dm device it looks > like, is that how you are running? That was my first thought, but no, I'm using partitions out of the SATA disks directly. I even checked for stray dm out of fake raid or somesuch, but the dm modules were not even loaded, and perusing /sys/block confirms the “scsi” devices are actual ATA disks. Further investigation suggested that when individual 512-byte blocks are read from a disk (that's the block size reported by the kernel), the underlying disk driver is supposed to inform the upper layer about what it could read by updating the bio_vec bits in precisely the observed way. -- Alexandre Oliva, freedom fighter http://FSFLA.org/~lxoliva/ You must be the change you wish to see in the world. -- Gandhi Be Free! -- http://FSFLA.org/ FSF Latin America board member Free Software Evangelist Red Hat Brazil Compiler Engineer -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
