I don't see much difference. I will update the commits on next iteration with the following: Kernbench shows almost no difference (-+ less than 1%): Before: Average Optimal load -j 12 Run (std deviation): Elapsed Time 102.63 (1.2695) User Time 1034.89 (1.18115) System Time 87.056 (0.456416) Percent CPU 1092.9 (13.892) Context Switches 199805 (3455.33) Sleeps 97907.8 (900.636) After: Average Optimal load -j 12 Run (std deviation): Elapsed Time 102.489 (1.10636) User Time 1034.86 (1.36053) System Time 87.764 (0.49345) Percent CPU 1095 (12.7715) Context Switches 199036 (4298.1) Sleeps 97681.6 (1031.11) Hackbench shows 0% difference on average (hackbench 90 repeated 10 times) attemp,before,after 1,0.076,0.069 2,0.072,0.069 3,0.066,0.066 4,0.066,0.068 5,0.066,0.067 6,0.066,0.069 7,0.067,0.066 8,0.063,0.067 9,0.067,0.065 10,0.068,0.071 average,0.0677,0.0677 Thanks, Thomas On Mon, May 2, 2016 at 3:00 PM, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> wrote: > On 05/02/2016 02:41 PM, Thomas Garnier wrote: >> -#define __PAGE_OFFSET _AC(0xffff880000000000, UL) >> +#define __PAGE_OFFSET_BASE _AC(0xffff880000000000, UL) >> +#ifdef CONFIG_RANDOMIZE_MEMORY >> +#define __PAGE_OFFSET page_offset_base >> +#else >> +#define __PAGE_OFFSET __PAGE_OFFSET_BASE >> +#endif /* CONFIG_RANDOMIZE_MEMORY */ > > Do you have any data about the performance impact of this change? It's > not necessary to have it to merge something like this, I'm just curious > how bad it is. -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
