On Thu, 8 Jul 2004 13:17:53 -0400 John Baldwin <jhb_at_FreeBSD.org> wrote: > On Thursday 08 July 2004 09:21 am, Taku YAMAMOTO wrote: > > greetings, > > > > > > A quick glance showed me that there are some interesting code paths in > > sched_ule.c that can be problematic in SMP case. > > > > 1. sched_choose() => kseq_idled() => sched_add() > > 2. sched_choose() => kseq_assign() => sched_add() > > 3. sched_runnable() => kseq_assign() => sched_add() > > > > Here is the patch that re-enables preemption except for the above three > > cases. > > This looks correct. I'll test it locally first. Has it worked for you all > day? My machine (HTT) has been up for 20 hours without a hang since last update. I tried to stress it in various ways (fsck -n, buildworld & buildkernel in parallel, burning a CD, etc.) but failed to crash it. I'm bit afraid since the code is not tested on real SMP machines. How is it going on yours? -- -|-__ YAMAMOTO, Taku | __ < <taku_at_tackymt.homeip.net> Post Scriptum to the people who know me as taku_at_cent.saitama-u.ac.jp: My email address has been changed since April, because I've left the university.Received on Fri Jul 09 2004 - 00:19:59 UTC
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