ACK: [SRU][Artful][PATCH 0/3] Fixes for LP:1744988
Colin Ian King
colin.king at canonical.com
Thu Feb 1 19:05:59 UTC 2018
On 01/02/18 18:59, Joseph Salisbury wrote:
> BugLink: http://bugs.launchpad.net/bugs/1744988
> == SRU Justification ==
> The bug reporter observeed NTP time drift on two servers running hwe kernels
> in Xenial. After rebooting the servers to the 4.10 or 4.13 kernels we were
> seeing a big time offset within minutes after booting. Despite running
> ntpd, it would not keep up and the offset stayed and kept growing over time.
> This is a regression that did not exist in the 4.4 Xenial kernel. This regression
> is fixed by three mainline commits, da4ae6c4a, b511203093 and 4b5b2127238. All
> three commits were added to mainline in v4.15-rc9.
> Bionic already recieved these patches via upstream stable updates.
> == Fixes ==
> da4ae6c4a0b8 ("x86/tsc: Future-proof native_calibrate_tsc()")
> b51120309348 ("x86/tsc: Fix erroneous TSC rate on Skylake Xeon")
> 4b5b2127238e ("x86/tsc: Print tsc_khz, when it differs from cpu_khz")
> == Regression Potential ==
> Low. These three commits fix an existing regression. They were also cc'd to
> stable so have had addition upstream review.
> == Test Case ==
> A test kernel was built with these patches and tested by the original bug reporter.
> The bug reporter states the test kernel resolved the bug.
> Len Brown (3):
> x86/tsc: Future-proof native_calibrate_tsc()
> x86/tsc: Fix erroneous TSC rate on Skylake Xeon
> x86/tsc: Print tsc_khz, when it differs from cpu_khz
> arch/x86/kernel/tsc.c | 9 ++++++++-
> 1 file changed, 8 insertions(+), 1 deletion(-)
Clean cherry picks, positive test results. Looks fine to me.
Acked-by: Colin Ian King <colin.king at canonical.com>
More information about the kernel-team