Steven Hartland wrote: > ----- Original Message ----- From: "Chargen" <chargen_at_gmail.com> > To: <freebsd-current_at_freebsd.org> > Sent: Saturday, January 26, 2008 4:36 AM > Subject: 7cur: SMP kernels /w POLLING enabled - combination > garbles(syncer?) console line message(s) on reboot > > >> 7cur: SMP kernels /w POLLING enabled - combination garbles (syncer?) >> console >> line message(s) on reboot >> >> SMP kernel with POLLING enabled garbles one or more of the last lines in >> console after issuing the {reboot} command >> >> options DEVICE_POLLING >> options HZ=1000 >> >> with or without sysctl -w kern.polling.enable=1 or sysctl -w >> kern.polling.enable=0 >> >> The garbled lines are between 'shutting down bufdaemon' and 'all buffs >> synced' (after 'bufdaemon', I presume these are the syncer, 'Syncing >> disks, vnodes synced' lines) >> >> I found it only reproducable with SMP /apic enabled kernel. Console >> messages >> after issuing reboot on UP kernels with polling_enabled are readable. >> >> Note: polling wasn't manually set on any device (tested on UP and SMP >> kernels) e.g.: no ifconfig em0 polling > > > Funny you should say that. Noticed that last night when rebooting one of > our new 7.0 machines but assumed it was a one off remote console > corruption. > > Just tested this again and its not. So I can confirm the corruption here > on 7.0-PRERELEASE amd64 without polling. It's harmless (actually a sign of increased concurrency); two threads are running printf concurrently. Add options PRINTF_BUFR_SIZE=[...] if you don't want to see this. KrisReceived on Sat Jan 26 2008 - 09:15:15 UTC
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