Date: Sat, 17 Sep 2005 21:23:51 -0700 From: "Michael C. Shultz" <ringworm01@gmail.com> To: freebsd-stable@freebsd.org Subject: Re: HEADS UP! Debugging, SMP changed in RELENG_6 Message-ID: <200509172123.52555.ringworm01@gmail.com> In-Reply-To: <432CE656.7010804@samsco.org> References: <432CE656.7010804@samsco.org>
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On Saturday 17 September 2005 21:00, Scott Long wrote: > All, > > I've turned off kernel deubgging (INVARIANTS, WITNESS, KDB) and malloc > debugging (the default is now 'aj) in the RELENG_6 branch in preparation > for 6.0-BETA5. I've also turned off SMP in the i386 and amd64 GENERIC > kernels and have added and SMP kernel config for those architectures. > All of these changes are nearly identical to what is in RELENG_5. All > of this was done to facilitate performance measurement of the upcoming > release and to recognize that our buglist is shrinking considerably and > thus the release will be coming soon. > > ### IMPORTANT ### > > If you are using a stock GENERIC kernel on amd64 or i386 and expect > multiple CPUs to be enabled, you must either switch to the SMP kernel > config, or add the 'options SMP' line back to the GENERIC config. > Multiple CPUs, including mutli-core and Hyperthreading, will only be > enabled when this option is included. Hyperthreading also requires > that you add the line 'machdep.hyperthreading_allowed=1' to > /boot/loader.conf. > > Given the growth of multicore offerings from AMD and Intel, the default > on SMP may change in future releases as SMP systems become ubiquitous. > Appropriate warning will be given on the mailing lists if this happens. > > Scott I've just spent the past few days trying to get 6.0 to work with my SATA drives with little results. Here is a DMESG when I booit with 5.4: ad0: 6149MB <WDC AC26400B/32.02S32> [13328/15/63] at ata0-master UDMA33 acd0: CDRW <TEAC DVD+RW DV-W58E/D.0J> at ata1-master UDMA33 ad4: 76319MB <WDC WD800JD-00HKA0/13.03G13> [155061/16/63] at ata2-master SATA150 ad6: 114473MB <WDC WD1200JD-00HBB0/08.02D08> [232581/16/63] at ata3-master SATA150 The drives work fine in 5.4, but with 6.0 ad4 errors out, you can see it with atacontrol but it can't be reinitialized and there is only /dev/ad4 but none of the slices. ad6 works ok during reads but anything more than very light writing and the system reboots. Given these drives work with 5.4 it seems a little more work needs to go into 6.0 before doing new releases I would hope. -Mike
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