[kernel patches,performance] lock contention, removal - other tweaks

Greetings to all


since I just recently stumbled upon the following kernel patchset [PATCH] mm/vmalloc: Introduce DEBUG_VMALLOCINFO to reduce spinlock contention]

and am successfully running it on my desktop kernel (3.13) with significant smoothness and interactivity improvements

I'd thought - why not let others on XDA know about it

http://marc.info/?l=linux-mm&m=139714810128208&w=2

I'm not sure if it'll apply cleanly to AOSP, AOKP, CM11, or stock kernel source of the G-Pad 8.3

but it's good to have it at the back of one's mind, that there's even more potential for smoothness


Within the following days I'll see if I can find additional improvement related to 3.4 kernel source and especially our device

but there's not much time due to studies & job - nevertheless I'll try to do my best to contribute to make the experience on this device the best as possible (how I miss the good ol' days on the SGS, GT-i9000 )



edit:

in a nutshell I'll add & post additional patches or patchsets to this thread

@mods:

if this is the wrong subforum I apologize in advance and please move the thread to the relevant sub-forum as you see fit - thanks !

EdenGottlieb said:

I couldn't find what I need to flash.


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apologies,

added patches to the tile

there's no kernel yet available with that patchset included

EdenGottlieb said:

Oh, ok. Looking forward for the result! Good luck with the coding!


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thanks,

ok, just inspected it and only a part of the changes apply (after applying manually)

so it's probably not worth it (the first mentioned patch),

patch -p1 --dry-run < /home/user/kernel-development/3.13.x/mm_fixes/\[PATCH\]\ mm_vmalloc\:\ Introduce\ DEBUG_VMALLOCINFO\ to\ reduce\ spinlock\ contention.txt
checking file lib/Kconfig.debug
Hunk #1 succeeded at 740 with fuzz 2 (offset 248 lines).
checking file mm/vmalloc.c
Hunk #1 FAILED at 1988.
Hunk #2 FAILED at 2020.
Hunk #3 FAILED at 2070.
Hunk #4 FAILED at 2101.
Hunk #5 succeeded at 2590 with fuzz 2 (offset 59 lines).
Hunk #6 FAILED at 2678.
Hunk #7 FAILED at 2690.
Hunk #8 FAILED at 2724.
7 out of 8 hunks FAILED
patch unexpectedly ends in middle of line

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will see what other patches could be candidates to use

ok, just found out that around 3.4 kernel release I wasn't very actively following the lkml (linux kernel mailing list)

will see if I can follow up reading what changes occured and/or backport some newer changes (having some patches for 3.8+ kernel but most of those aren't interesting for embedded / android devices - I guess)