Re: nethack, you *will* migrate, really!! : suggestion for double request checking...
Florian Delizy <[email protected]> Mon, 02 Oct 2006 10:00:07 +0200
| Newsgroups | gmane.linux.cluster.openmosix.devel |
|---|---|
| Message-ID | <[email protected]> |
Vincent Hanquez wrote: > On Fri, Sep 29, 2006 at 11:22:28PM +0200, Florian Delizy wrote: > >> I found the reason why the nethack process would not migrate, tell me if >> I am wrong, but it seems that processes can only migrate on sycall enter >> (or schedule enter). >> >> If the move request gets to the task during a syscall, it is simply >> discarded, and the process does not migrate at all. I understand this >> makes sense for a normal HPC process (cpu consuming, means, no or nearly >> no syscall), but I think it would make sense to try migration on syscall >> exit (this is what this patch should do). >> >> Vincent, can you please tell me if I am right ? or so ? >> > > Are you using PREEMPT ? > > Nope (not yet?) Anyway, after we discussed on MSN, it seems that there is a hook missing in syscall_ret_carefull, I'll check that out today (just to let the list know ...) ------------------------------------------------------------------------- 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