Date: Sat, 18 Feb 2017 12:49:29 -0800 From: Mark Millard <markmi@dsl-only.net> To: mjg@freebsd.org, Justin Hibbits <chmeeedalf@gmail.com> Cc: svn-src-head@freebsd.org, FreeBSD PowerPC ML <freebsd-ppc@freebsd.org>, FreeBSD Current <freebsd-current@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: <AE0F9808-49F5-4345-891B-32ED542958E8@dsl-only.net> In-Reply-To: <2FD12B8F-2255-470A-98D4-2DCE9C7495F5@dsl-only.net> References: <2FD12B8F-2255-470A-98D4-2DCE9C7495F5@dsl-only.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On 2017-Feb-18, at 4:18 AM, Mark Millard <markmi at dsl-only.net> wrote: > [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. :) [Of course: "either direction".] I'll note that the -r313864 buildworld was without MALLOC_PRODUCTION being defined. (Unusual for me but I'm testing if a jemalloc assert problem on arm64 also happens on powerpc64.) By contrast the buildkernels were production style (as is normal for me unless I'm trying to track something down that I think might be exposed by the extra checks). === Mark Millard markmi at dsl-only.net
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?AE0F9808-49F5-4345-891B-32ED542958E8>