Re: [PATCH v2] ARM: VDSO: fix coarse clock monotonicity regression

2015-08-12 Thread John Stultz
On Mon, Aug 10, 2015 at 8:46 AM, Nathan Lynch wrote: > Since 906c55579a63 ("timekeeping: Copy the shadow-timekeeper over the > real timekeeper last") it has become possible on ARM to: Apologies I didn't catch that the core change caused a regression for ARM. Though fixing the ARM vdso logic in th

Re: [PATCH v2] ARM: VDSO: fix coarse clock monotonicity regression

2015-08-10 Thread Will Deacon
On Mon, Aug 10, 2015 at 04:46:32PM +0100, Nathan Lynch wrote: > Since 906c55579a63 ("timekeeping: Copy the shadow-timekeeper over the > real timekeeper last") it has become possible on ARM to: > > - Obtain a CLOCK_MONOTONIC_COARSE or CLOCK_REALTIME_COARSE timestamp > via syscall. > - Subsequentl

[PATCH v2] ARM: VDSO: fix coarse clock monotonicity regression

2015-08-10 Thread Nathan Lynch
Since 906c55579a63 ("timekeeping: Copy the shadow-timekeeper over the real timekeeper last") it has become possible on ARM to: - Obtain a CLOCK_MONOTONIC_COARSE or CLOCK_REALTIME_COARSE timestamp via syscall. - Subsequently obtain a timestamp for the same clock ID via VDSO which predates the f