[adding linux-scsi and mkp] On 3/24/19 6:07 AM, Hussam Al-Tayeb wrote: > Hi. I'm seeing a debug message in linux stable kernel 4.19.31 with this > patch > scsi-sd-optimal-i-o-size-should-be-a-multiple-of-physical-block- > size.patch > > I am getting: > Mar 23 17:40:10 hades kernel: sd 0:0:0:0: [sda] Optimal transfer size 0 > bytes < PAGE_SIZE (4096 bytes) > Mar 23 17:40:10 hades kernel: sd 2:0:0:0: [sdb] Optimal transfer size 0 > bytes < PAGE_SIZE (4096 bytes) > Mar 23 17:46:43 hades kernel: sd 4:0:0:0: [sdc] Optimal transfer size 0 > bytes < PAGE_SIZE (4096 bytes) > > sda and sdb are physically attached SATA mechanical disks (Western > Digital and Seagate, respectively). > sdc is a kingston usb flash drive. All three disks use ext4 luks > encrypted partitions. > Is the fact that it is reporting 0 as optimal transfer size something I > should worry about? Note that the the three storage devices are from > three different manufacturers. > This particular machine is a Lenovo Intel(R) Core(TM) i5-6400 CPU @ > 2.70GHz with 16GB Kingston DDR4 ram. > > I tried moving the root disk to another machine (a DELL Core I7 7700 > with slightly faster ram from Samsung) and I saw the same message. > > This seems like a patch that fits better in a hardware vendor or > operating system distributor tree than the upstream kernel. Shouldn't > stable tree kernels only contain direct fixes and regression fixes? > Does it really belong in an LTS kernel? > > Please CC me in your reply as I am not subscribed to the list. > Thank you. > -- ~Randy
