Linux 5.15 LTS release – Main Changes, Arm, RISC-V and MIPS architectures

Linux 5.15

Linus Torvalds released Linux 5.15, an LTS version, this past Sunday: It’s been calm, and I have no excuse to add an extra rc, so here we are, with v5.15 pushed out, and the merge window starting tomorrow. Which is going to be a bit inconvenient for me, since I also have some conference travel coming up. But it’s only a couple of days and I’ll have my laptop with me. Sometimes the release timing works out, and sometimes it doesn’t.. Anyway, the last week of 5.15 was mainly networking and gpu fixes, with some random sprinkling of other things (a few btrfs reverts, some kvm updates, minor other fixes here and there – a few architecture fixes, couple of tracing, small driver fixes etc). Full shortlog appended. This release may have started out with some -Werror pain, but it calmed down fairly quickly and on the whole 5.15 was […]

Tronsmart Draco AW80 SATA Performance in Android

When Allwinner A80 TV boxes with SATA port were first release, some people hailed SATA performance, especially while seeking during video playback. But at the time, I was skeptical of these claims since Allwinner A80 SoC does not have have a SATA interface, so a USB to SATA bridge must be used, and the performance should be the same as USB hard drives. Unfortunately, I was unable to confirm these doubts, and test SATA performance in my review of Tronsmart Draco AW80 Meta, because at the time, I did not have any spare SATA hard drive or SSD. But since I’ve received CubieTruck Metal Case kit, which include a 120 GB SSD, so I could finally test the device SATA interface. This CHUANG JIU SSD achieves write and read speeds of respectively 8.7 MB/s & 50.5 MB/s for NTFS, and 36.31 MB/s & 179.45 MB/s for EXT-4 using CubieTruck with […]

Current Performance and Stability Issues on AllWinner A80 OptimusBoard Development Board

Sine A80 OptimusBoard is the first ARM hardware that supports both USB 3.0 and Gigabit that I’ve ever owned, so I though it might be interesting to see what performance I could get with a USB 3.0 hard drive through the USB 3.0 OTG port of the board. For testing purpose, I bought a USB 3.0 OTG adapter on Ebay, but I did not look closely enough as it turned out to be only a USB 3.0 OTG to USB 2.0 female adapter capable of USB 2.0 speeds… Kind of useless item since you can plug a standard USB 2.0 OTG adapter into a USB 3.0 OTG receptacle. But I tried my hard drive anyway, and quickly realized write performance was very poor at 3 MB/s on the NTFS partition, whereas most other devices can handle at least15 MB/s, and usually over 25 MB/s. So I contacted Allwinner with this […]