What Excites Me The Most About The Linux 4.12 Kernel

[phoronix]

Phoronix: What Excites Me The Most About The Linux 4.12 Kernel

If all goes according to plan, the Linux 4.12 kernel will be officially released before the weekend is through. Here's a recap of some of the most exciting changes for this imminent kernel update...

http://www.phoronix.com/scan.php?page=news_item&px=Linux-4.12-Kernel-Exciting

[tildearrow]

Typo:

and even support for the old Motoroa DROID4.

[starshipeleven]

BFQ is the main thing I'm excited about.

[doublez13]

Btrfs raid 5/6 fixes!

[Chewi]

Hmm. Will have to see whether KASLR causes further issues on Ryzen.

[perpetually high]

How does one activate bfq?

$ echo bfq > /sys/block/sda/queue/scheduler
bash: echo: write error: Invalid argument
$ echo deadline > /sys/block/sda/queue/scheduler
$ echo cfq > /sys/block/sda/queue/scheduler
$ uname -a
Linux ubuntu 4.12.0-041200rc7-generic #201706252231 SMP Mon Jun 26 02:33:00 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

elevator=bfq didn't work in /etc/default/grub either, any ideas?

[perpetually high]

Create a custom kernel package, with the make xconfig command you can activate/deactivate what you want. See the 2. msg:
https://www.phoronix.com/forums/foru...in-living-room

Thanks for the reply. I thought I didn't need to since it was included in the 4.12 kernel, I'm running the latest RC7 at the moment.

[zdzichu]

How does one activate bfq?

First you have to switch to multiqueue block layer: put scsi_mod.use_blk_mq=y on the kernel command line. Then you will be able to echo "bfq" to queue/scheduler.

[duby229]

Now I know full well that KASLR has already been hacked, and is trivial to get around, but damn it, it's about Fing time.I wouldn't go so far as to claim the same thing for userspace ASLR, anymore, but for kernel space KASLR, this needed to be defaulted a long time ago. The only reason it wasn't was because of a really stupid retarded argument. In fact I'm really surprised it got defaulted at all, but thank goodness for it.

[sarfarazahmad]

I guess if you switch to blk-mq scheduler using kernel parameters, blk-mq should be visible in sys/block/sda/queue/scheduler