Not logged in
Log in now
Create an account
Subscribe to LWN
Deadline scheduling: coming soon?
LWN.net Weekly Edition for November 27, 2013
ACPI for ARM?
LWN.net Weekly Edition for November 21, 2013
GNU virtual private Ethernet
Yes, you are overly naive...
Posted Jul 22, 2009 18:53 UTC (Wed) by PaXTeam (subscriber, #24616)
however there's more cost to this: TLB repopulation which would inevitably occur after returning to userland. that is the real expense as we're talking about up to hundreds of TLB entries on modern CPU cores, each potentially missing in the data cache and incurring hundreds of cycles.
Copyright © 2013, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds