On 03/06/2014 05:37 PM, Davidlohr Bueso wrote: > On Wed, 2014-03-05 at 16:45 -0800, Dave Hansen wrote: >> From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> >> + >> +If you believe that invlpg is being called too often, you can >> +lower the tunable: >> + >> + /sys/debug/kernel/x86/tlb_single_page_flush_ceiling >> + > > Whenever this tunable needs to be updated, most users will not know what > a invlpg is and won't think in terms of pages either. How about making > this in units of Kb instead? But then again most of those users won't be > looking into tlb flushing issues anyways, so... Yeah, talking about the instruction directly in the documentation is probably going a bit far. I'll see if I can uplevel it a bit. It's obviously not a big deal to change it to be pages vs. kb, but for something that's as *COMPLETELY* developer-focused, I think we can keep it in pages. We don't want users fooling with this. > While obvious, tt should also mention that this does not apply to > hugepages. Good point. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>