On 11/23/06, Pavel Emelianov <[EMAIL PROTECTED]> wrote: > > We can do the following: > > if (tsk == current) > /* fast way */ > tsk->exec_bc = bc; > else > /* slow way */ > stop_machine_run(...); > > What do you think?
How about having two pointers per task: - exec_bc, which is the one used for charging - real_bc, which is the task's actual beancounter at the start of irq, do current->exec_bc = &init_bc; at the end of irq, do current->exec_bc = current->real_bc; When moving a task to a different bc do: task->real_bc = new_bc; atomic_cmpxchg(&task->exec_bc, old_bc, new_bc); (with appropriate memory barriers). So if the task is in an irq with a modified exec_bc pointer, we do nothing, otherwise we update exec_bc to point to the new real_bc. Paul ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ ckrm-tech mailing list https://lists.sourceforge.net/lists/listinfo/ckrm-tech
