mirror of https://github.com/torvalds/linux.git
bcc80dec91
read_hv_sched_clock_tsc() assumes that the Hyper-V clock counter is bigger than the variable hv_sched_clock_offset, which is cached during early boot, but depending on the timing this assumption may be false when a hibernated VM starts again (the clock counter starts from 0 again) and is resuming back (Note: hv_init_tsc_clocksource() is not called during hibernation/resume); consequently, read_hv_sched_clock_tsc() may return a negative integer (which is interpreted as a huge positive integer since the return type is u64) and new kernel messages are prefixed with huge timestamps before read_hv_sched_clock_tsc() grows big enough (which typically takes several seconds). Fix the issue by saving the Hyper-V clock counter just before the suspend, and using it to correct the hv_sched_clock_offset in resume. This makes hv tsc page based sched_clock continuous and ensures that post resume, it starts from where it left off during suspend. Override x86_platform.save_sched_clock_state and x86_platform.restore_sched_clock_state routines to correct this as soon as possible. Note: if Invariant TSC is available, the issue doesn't happen because 1) we don't register read_hv_sched_clock_tsc() for sched clock: See commit |
||
|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| acpi_pm.c | ||
| arc_timer.c | ||
| arm_arch_timer.c | ||
| arm_global_timer.c | ||
| armv7m_systick.c | ||
| asm9260_timer.c | ||
| bcm2835_timer.c | ||
| bcm_kona_timer.c | ||
| clksrc-dbx500-prcmu.c | ||
| clksrc_st_lpc.c | ||
| clps711x-timer.c | ||
| dummy_timer.c | ||
| dw_apb_timer.c | ||
| dw_apb_timer_of.c | ||
| em_sti.c | ||
| exynos_mct.c | ||
| hyperv_timer.c | ||
| i8253.c | ||
| ingenic-ost.c | ||
| ingenic-sysost.c | ||
| ingenic-timer.c | ||
| jcore-pit.c | ||
| mips-gic-timer.c | ||
| mmio.c | ||
| mps2-timer.c | ||
| mxs_timer.c | ||
| nomadik-mtu.c | ||
| numachip.c | ||
| renesas-ostm.c | ||
| samsung_pwm_timer.c | ||
| scx200_hrt.c | ||
| sh_cmt.c | ||
| sh_mtu2.c | ||
| sh_tmu.c | ||
| timer-armada-370-xp.c | ||
| timer-atmel-pit.c | ||
| timer-atmel-st.c | ||
| timer-atmel-tcb.c | ||
| timer-cadence-ttc.c | ||
| timer-clint.c | ||
| timer-cs5535.c | ||
| timer-davinci.c | ||
| timer-digicolor.c | ||
| timer-ep93xx.c | ||
| timer-fsl-ftm.c | ||
| timer-fttmr010.c | ||
| timer-goldfish.c | ||
| timer-gx6605s.c | ||
| timer-gxp.c | ||
| timer-imx-gpt.c | ||
| timer-imx-sysctr.c | ||
| timer-imx-tpm.c | ||
| timer-integrator-ap.c | ||
| timer-ixp4xx.c | ||
| timer-keystone.c | ||
| timer-loongson1-pwm.c | ||
| timer-lpc32xx.c | ||
| timer-mediatek-cpux.c | ||
| timer-mediatek.c | ||
| timer-meson6.c | ||
| timer-microchip-pit64b.c | ||
| timer-milbeaut.c | ||
| timer-mp-csky.c | ||
| timer-msc313e.c | ||
| timer-npcm7xx.c | ||
| timer-of.c | ||
| timer-of.h | ||
| timer-orion.c | ||
| timer-owl.c | ||
| timer-pistachio.c | ||
| timer-probe.c | ||
| timer-pxa.c | ||
| timer-qcom.c | ||
| timer-ralink.c | ||
| timer-rda.c | ||
| timer-riscv.c | ||
| timer-rockchip.c | ||
| timer-rtl-otto.c | ||
| timer-sp.h | ||
| timer-sp804.c | ||
| timer-sprd.c | ||
| timer-stm32-lp.c | ||
| timer-stm32.c | ||
| timer-sun4i.c | ||
| timer-sun5i.c | ||
| timer-tegra.c | ||
| timer-tegra186.c | ||
| timer-ti-32k.c | ||
| timer-ti-dm-systimer.c | ||
| timer-ti-dm.c | ||
| timer-versatile.c | ||
| timer-vf-pit.c | ||
| timer-vt8500.c | ||
| timer-zevio.c | ||