Date: Sat, 18 Feb 2017 04:18:05 -0800 From: Mark Millard <markmi@dsl-only.net> To: mjg@freebsd.org, Justin Hibbits <chmeeedalf@gmail.com>, svn-src-head@freebsd.org, FreeBSD PowerPC ML <freebsd-ppc@freebsd.org>, FreeBSD Current <freebsd-current@freebsd.org> Cc: Nathan Whitehorn <nwhitehorn@freebsd.org> Subject: Re: svn commit: r313268 - head/sys/kern [through -r313271 for atomic_fcmpset use and later: fails on PowerMac G5 "Quad Core"; -r313266 works] Message-ID: <2FD12B8F-2255-470A-98D4-2DCE9C7495F5@dsl-only.net>
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[Note: I experiment with clang based powerpc64 builds, reporting problems that I find. Justin is familiar with this, as is Nathan.] I tried to update the PowerMac G5 (a so-called "Quad Core") that I have access to from head -r312761 to -r313864 and ended up with random panics and hang ups in fairly short order after booting. Some approximate bisecting for the kernel lead to: (sometimes getting part way into a buildkernel attempt for a different version before a failure happens) -r313266: works (just before use of atomic_fcmpset) vs. -r313271: fails (last of the "use atomic_fcmpset" check-ins) (I did not try -r313268 through -r313270 as the use was gradually added.) So I'm currently running a -r313864 world with a -r313266 kernel. No kernel that I tried that was from before -r313266 had the problems. Any kernel that I tried that was from after -r313271 had the problems. Of course I did not try them all in other direction. :) === Mark Millard markmi at dsl-only.net
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