Messages in this thread | | | Subject | Re: [PATCH v3] xen: Fix x86 sched_clock() interface for xen | From | Boris Ostrovsky <> | Date | Mon, 14 Jan 2019 08:54:29 -0500 |
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On 1/14/19 7:44 AM, Juergen Gross wrote: > Commit f94c8d11699759 ("sched/clock, x86/tsc: Rework the x86 'unstable' > sched_clock() interface") broke Xen guest time handling across > migration: > > [ 187.249951] Freezing user space processes ... (elapsed 0.001 seconds) done. > [ 187.251137] OOM killer disabled. > [ 187.251137] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done. > [ 187.252299] suspending xenstore... > [ 187.266987] xen:grant_table: Grant tables using version 1 layout > [18446743811.706476] OOM killer enabled. > [18446743811.706478] Restarting tasks ... done. > [18446743811.720505] Setting capacity to 16777216 > > Fix that by setting xen_sched_clock_offset at resume time to ensure a > monotonic clock value. > > Fixes: f94c8d11699759 ("sched/clock, x86/tsc: Rework the x86 'unstable' sched_clock() interface") > Cc: <stable@vger.kernel.org> # 4.11 > Reported-by: Hans van Kranenburg <hans@knorrie.org> > Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
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