Review request: (turn off transparent huge pages) 8024838: Significant slowdown due to transparent huge pages

[Bengt Rutisson]

Stefan,

Looks good.

Bengt

On 10/3/13 9:40 PM, Stefan Karlsson wrote:
> Please review this change to turn off transparent huge pages by default.
>
> http://cr.openjdk.java.net/~stefank/8024838/webrev.00/
>
> 8024838: Significant slowdown due to transparent huge pages
> Summary: Don't turn on transparent huge pages 
> (-XX:+UseTransparentHugePages) unless explicitly specified on the 
> command line. This has the effect that large pages are never turned on 
> Linux unless the user has explicitly enabled any of the large pages 
> flags: -XX:+UseLargePages, -XX:+UseTransparentHugePages, 
> -XX:+UseHugeTLBFS, and -XX:+UseSHM.
> Reviewed-by: TBD1, TBD2
>
> thanks,
> StefanK