RE: [PATCH] xen/arm: avoid vtimer flip-flop transition in context switch

Hi Julien, > -Original Message- > From: Julien Grall > Sent: 2022年6月17日 16:32 > To: Wei Chen ; xen-devel@lists.xenproject.org > Cc: nd ; Stefano Stabellini ; Bertrand > Marquis ; Volodymyr Babchuk > > Subject: Re: [PATCH] xen/arm: avoid vtimer flip-flop transi

Re: [PATCH] xen/arm: avoid vtimer flip-flop transition in context switch

On 15/06/2022 11:36, Wei Chen wrote: Hi Julien, Hi Wei, -Original Message- From: Julien Grall Sent: 2022年6月15日 17:47 To: Wei Chen ; xen-devel@lists.xenproject.org Cc: nd ; Stefano Stabellini ; Bertrand Marquis ; Volodymyr Babchuk Subject: Re: [PATCH] xen/arm: avoid vtimer flip

RE: [PATCH] xen/arm: avoid vtimer flip-flop transition in context switch

Hi Julien, > -Original Message- > From: Julien Grall > Sent: 2022年6月15日 17:47 > To: Wei Chen ; xen-devel@lists.xenproject.org > Cc: nd ; Stefano Stabellini ; Bertrand > Marquis ; Volodymyr Babchuk > > Subject: Re: [PATCH] xen/arm: avoid vtimer flip-flop transi

Re: [PATCH] xen/arm: avoid vtimer flip-flop transition in context switch

Hi Wei, Title: I don't quite understand what you mean by "flip-flop transition". On 15/06/2022 02:39, Wei Chen wrote: virt_vtimer_save is calculating the new time for the vtimer and has a potential risk of timer flip in: "v->arch.virt_timer.cval + v->domain->arch.virt_timer_base.offset - boot_c