Date: Wed, 10 Apr 2019 23:36:10 -0700 From: Mark Millard <marklmi@yahoo.com> To: Konstantin Belousov <kostikbel@gmail.com>, Bruce Evans <brde@optusnet.com.au> Cc: freebsd-hackers Hackers <freebsd-hackers@freebsd.org>, FreeBSD PowerPC ML <freebsd-ppc@freebsd.org> Subject: Re: powerpc64 head -r344018 stuck sleeping problems: th->th_scale * tc_delta(th) overflows unsigned 64 bits sometimes [patched failed] Message-ID: <FF94836E-9CD6-4BF5-9E32-67BED3523A77@yahoo.com> In-Reply-To: <7B096BB4-7DBA-4B95-AC1E-DDD9A7DF3B22@yahoo.com> References: <20190307222220.GK2492@kib.kiev.ua> <20190309144844.K1166@besplex.bde.org> <20190324110138.GR1923@kib.kiev.ua> <E0785613-2B6E-4BB3-95CD-03DD96902CD8@fh-muenster.de> <20190403070045.GW1923@kib.kiev.ua> <20190404011802.E2390@besplex.bde.org> <F22CCA2C-08BB-452E-B00C-A36CD4611540@yahoo.com> <20190405150236.A959@besplex.bde.org> <F3BBD355-5198-41A0-A461-8E5E12984BE7@yahoo.com> <20190405201055.I2396@besplex.bde.org> <20190405113504.GA1923@kib.kiev.ua> <55604EF6-CB81-4300-8E9E-E3A94504D0B5@yahoo.com> <3592A7F1-9EAE-4A33-B51A-678BE104E18C@yahoo.com> <7B096BB4-7DBA-4B95-AC1E-DDD9A7DF3B22@yahoo.com>
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I do not know if the below will suggest any test cases or not. I just note it for superficial similarity and possibly more usual hardware than the old PowerMac context that I have. https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D230451 "nanosleep = hangs forever" seems to be an example on an old ~500 MHz 586-class AMD CPU when kern.timecounter.hardware was ACPI-fast instead of TSC. The 2018-08-08 report was for 11.2-Stable. =3D=3D=3D Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)
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