Larry Finger composed on 2016-03-31 21:28 (UTC-0500):
Felix Miata wrote:
Preliminary indication seems to be that I have narrowed this down to some EXT4 related problem. I cloned big41's HD to another physical disk, which didn't help, so not likely it is hardware fault.
Then, I created a fresh EXT3 partition of identical size as the original on the clone, rsync'd to it, adjusted bootloader and fstab accordingly, and the EXT3 copy boots 4.5.0 just as fast as 4.4.1, in well under a minute.
Fedora 24's 4.5rc6 was giving identical trouble, so I repeated the switch to EXT3 with it. Problem solved there too.
How can I narrow down what (Dracut's?) problem with EXT4 seems to be?
You might try bisecting the kernel source between 4.5 and 4.4 to see if you can identify which kernel commit is causing the problem.
What would I be looking for, assuming I had any idea how to read source in the first place, which I don't? This started as far back as a year ago IIRC, with what seemed way back when to be random installations and kernel versions. It never happened on 32 bit installations, and I wasn't keeping track of which 64 bit were on EXT3 and which on EXT4. These have or not the problem on host big41's clone HD on EXT4 installations: Fedora 24: 4.5.rc6git2.1 bad 4.5.rc5git0.1 OK 4.4.rc6git1.1 OK 4.3.rc5git0.1 bad 4.2.rc8git0.1 bad Fedora 23: 4.1.rc8git0.2 OK TW: 4.5.0-1 (hd0,9) bad 4.5.0-1 (hd0,22) bad 4.4.3-1 (hd0,9) bad 4.4.1-1 (hd0,22) OK 4.3.3-1 (hd0,22) bad 4.2.1 (hd0,9) bad 4.1.3 (hd0,9) bad 13.2: 3.16.7-35 OK 3.16.7-29 OK (Dec 1 2015 initrd) 3.16.7-7 bad (Dec 31 2014 initrd) 13.1: 3.12.53-40 OK (Feb 26 2016 initrd) 3.12.51-1 OK (Dec 31 2015 initrd) 3.11.10-28 OK (Apr 27 2015 initrd) Host p5bse TW (old big41 HD from which big41's prior HD was cloned to newer, then moved without modifications to p5bse): 4.4.1-1 OK (26 Feb 2016 initrd) 4.3.3-5 OK (10 Jan 2016 initrd) 4.2.1-1 OK (15 Oct 2015 initrd) 4.1.6-1 OK (28 Aug 2015 initrd) 4.0.5-1 OK (17 Jun 2015 initrd) Host p5bse 42.1: 4.1.15-8 OK 4.1.12-1 OK -- "The wise are known for their understanding, and pleasant words are persuasive." Proverbs 16:21 (New Living Translation) Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata *** http://fm.no-ip.com/ -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org