Re: [4.14] Failing selftest timer/adjtick

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Hi Miroslav,

On 2/10/2021 2:19 PM, Miroslav Lichvar wrote:
That patch cannot be applied alone. It would break the timekeeping in
not so obvious ways as there will be unexpected sources of the NTP
tracking error. IIRC, at least the following changes would need to be
included with it. There may be others.

c2cda2a5bda9 ("timekeeping/ntp: Don't align NTP frequency adjustments to ticks")
aea3706cfc4d ("timekeeping: Remove CONFIG_GENERIC_TIME_VSYSCALL_OLD")
d4d1fc61eb38 ("ia64: Update fsyscall gettime to use modern vsyscall_update")

My suggestion for a fix would be to increase the limit in the failing
test.
Thanks, that's what I expected. But I still wonder why the test is failing almost 100% of time for me on qemu-arm64 (running on x86). Is this a regression in 4.14, that was working at some point or was it never tested on arm?

Joerg




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