On 11/23/06, Pavel Emelianov <[EMAIL PROTECTED]> wrote: > You mean moving is like this: > > old_bc = task->real_bc; > task->real_bc = new_bc; > cmpxchg(&tsk->exec_bc, old_bc, new_bc); > > ? Then this won't work: > > Initialisation: > current->exec_bc = init_bc; > current->real_bc = init_bc; > ... > IRQ: > current->exec_bc = init_bc; > ... > old_bc = tsk->real_bc; /* init_bc */ > tsk->real_bc = bc1; > cx(tsk->exec_bc, init_bc, bc1); /* ok */ > ... > Here at the middle of an interrupt > we have bc1 set as exec_bc on task > which IS wrong!
You could get round that by having a separate "irq_bc" that's never valid for a task not in an interrupt. 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
