Linux 4.2-rc5 Is Now Available

[phoronix]

Phoronix: Linux 4.2-rc5 Is Now Available

The fifth weekly test version of the Linux 4.2 kernel is now available...

http://www.phoronix.com/scan.php?page=news_item&px=Linux-4.2-rc5-Released

[dungeon]

Let me compilado my first one with gcc 5.2... khm, hopefully nothing will break with gcc 5.2 as Debian switched/defaults to it few days back.

edit: runs great, a bit lower CPU usage more responsive it seems... maybe something is fixed in rc5? khm, but no probably just compiler this time, maybe i was too long with 4.9 - so kudos to GNU this time

[dungeon]

No idea it feels like in area of 3% improvment just from compiler and kernel nothing else This is on total silence machine without any fans on Athlon 5350

Let me do some phoronix bench maybe that will show something too...

Yeah c-ray shows it, it was 78 now 74 = 5% better

http://openbenchmarking.org/result/1508035-BE-GCC521KER82

[dungeon]

Yeah coming from the kernel, generic kernel, nothing patched, nothing fancy... identical config from last week rc4 kernel.

I think i will compile now one with 4.9 just to be sure this perf coming from compiler or from rc5 itself.

edit: nope it is not about kernel, compiler does improve perf

[dungeon]

Thank you very much for investigating it

OK, but as you say who knows yet what it is for sure... maybe it is something in conjuction of kernel+compiler came in, so maybe I will compile rc4 or something more older later but with gcc-5.2, well if that even wants to compile...

As I can't compile current mesa for example yet with gcc-5.2.1 vdpau fails with it, if i omit it then it compile but then does not work - missing llvm symbols ... maybe some flags is needed i will see...

[DanL]

Linus said:

We're getting up there to the later rc's, but it's looking like 4.2 might be one of the releases needing more than the usual seven rc releases - things aren't calming down like I would wish, and we've still had some fairly annoying issues pop up.

-- https://lkml.org/lkml/2015/8/2/211