[Testing Update] 2018-11-28 - Kernels, Plasma5, Cinnamon, Deepin, XFCE, Firefox, Systemd

update
testing

#22

Thanks for the interesting info. Just to clarify. my post was not intended to complain, nor to intimate any problem per se, but instead only to inform other Manjaroos if they’d not otherwise been aware of this recent change.

The context for my interest in this is that, as i’d previously posted elsewhere in the forum, my Tower had experienced a series of nasty total freezes over months, which defied all diagnostic attempts to find root cause, until i discovered that it was using BFQ. I was going to then change it myself to CFQ but happily Phil at that time independently decided to provide CFQ as default in an update… & all my freezes immediately stopped. Hence with every 4.19.x update since then i have rechecked to see if it was still CFQ, which it was. I’ve been dreading a possible return to BFQ. Thus yesterday’s different change surprised me. That’s only in my Testing VMs, but obviously it will soon come to my Stable real Manjaroos… so i shall be a bit nervous to see if the freezes come back then or not.

It had not only been me making older posts about schedulers & concern about BFQ, so i hoped my post today might be of interest also to those Manjaroos.


#23

Well, cfq or bfq-sq is still better for systems with HDD’s. blk-mq mode has no real-world benefit for people still using HDD’s as far as I know.

Also, mq-deadline is not the best scheduler for rotational disks. The user gives up a lot of system response when writing non-trivial amounts of data to HDD. This is not good for workstations.

Users should not rely on these I/O scheduler defaults during the transition to blk-mq. There is much variation in real-world performance between different modes.


#24

In no way do i dismiss legitimate concerns like that. However, in order of priority i rate my Tower NOT freezing as being #1, then if that requirement is met, i’m happy to contemplate viable opportunities for performance improvements. My Tower has Manjaro & /home on SSD, & some other data + all my VMs on HDD… fyi.


#25

FWIW, I use mq-deadline on my SSD’s, and bfq-mq on my spinner; haven’t had any issues…


#26

Also here:

right click on the green info star/ Pamac/Updates.
is leading to udeterministic freezes and the cpu is running hot with 94 - 100% cpu-usage.
(e.g. 1 of 4 rightclicks/pamac/updates is freezing)
as found in:


#27

Receiving this still, yet rolling back to stable removes it.

Nov 30 22:59:01 xmg systemd[1]: Stopping User Manager for UID 992...
Nov 30 22:59:01 xmg systemd[2870]: Stopping D-Bus User Message Bus...
Nov 30 22:59:01 xmg systemd[2870]: Stopped target Default.
Nov 30 22:59:01 xmg systemd[2870]: Stopped D-Bus User Message Bus.
Nov 30 22:59:01 xmg systemd[2870]: Stopped target Basic System.
Nov 30 22:59:01 xmg systemd[2870]: Stopped target Timers.
Nov 30 22:59:01 xmg systemd[2870]: Stopped target Paths.
Nov 30 22:59:01 xmg systemd[2870]: Stopped target Sockets.
Nov 30 22:59:01 xmg systemd[2870]: Closed GnuPG cryptographic agent and passphrase cache (access for web browsers).
Nov 30 22:59:01 xmg systemd[2870]: Closed GnuPG network certificate management daemon.
Nov 30 22:59:01 xmg systemd[2870]: Closed Sound System.
Nov 30 22:59:01 xmg systemd[2870]: Closed p11-kit server.
Nov 30 22:59:01 xmg systemd[2870]: Closed GnuPG cryptographic agent and passphrase cache (restricted).
Nov 30 22:59:01 xmg systemd[2870]: Closed GnuPG cryptographic agent (ssh-agent emulation).
Nov 30 22:59:01 xmg systemd[2870]: Closed GnuPG cryptographic agent and passphrase cache.
Nov 30 22:59:01 xmg systemd[2870]: Closed D-Bus User Message Bus Socket.
Nov 30 22:59:01 xmg systemd[2870]: Reached target Shutdown.
Nov 30 22:59:01 xmg systemd[2870]: Starting Exit the Session...
Nov 30 22:59:01 xmg systemd[2871]: pam_unix(systemd-user:session): session closed for user sddm
Nov 30 22:59:01 xmg systemd[1]: Stopped User Manager for UID 992.
Nov 30 22:59:01 xmg systemd[1]: Stopping User Runtime Directory /run/user/992...
Nov 30 22:59:01 xmg systemd[1]: Stopped User Runtime Directory /run/user/992.
Nov 30 22:59:01 xmg systemd[1]: Removed slice User Slice of UID 992.

#28

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