Re: [Xen-devel] Sles9.3 HVM guest block

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

Update: changeset 14039:87f31a0db841 in xen-unstable may well fix this
problem. It fixes a going-to-sleep race when executing HLT in an HVM guest.

 -- Keir

On 20/2/07 17:00, "Woller, Thomas" <thomas.woller@xxxxxxx> wrote:

> Keir,
> During regression of testing 32b UP SLES9.3/SUSE10 HVM guests on 64b hv,
> we are seeing a problem with the guest becoming permanently blocked (b
> state).  Blockage occurs at fairly random times... booting, fsck,
> ltp/cerberos - on both AMD-V and VT, and takes from 5 minutes to many
> hours to fail.  Last c/s tested was 13947 that we see the problem.
> We've traced it back to changeset 13320.  if we boot the guest with
> hpet=disabled, then the guest runs without problem (tested 48 hours w/o
> failure).  Adding the "vcpu_kick" line removed with c/s 13320 also
> alleviates the problem (24 hours w/o failure).
> Let me know if you need any more details concerning the guest
> configuration or host machine, or if you believe/need alternate testing
> parms would be useful, and we can run additional tests.
> 
> # HG changeset patch
> # User kfraser@xxxxxxxxxxxxxxxxxxxxx
> # Date 1168438470 0
> # Node ID 36fd53b2e3b4a41b4664be1abc059e25622e2ee3
> # Parent  0b679a6d8ad083022d2a0463ff3a5fa5a852c7c4
> [HVM] Remove unneeded vcpu_kick() from HPET device model.
> Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
> 
> diff -r 0b679a6d8ad0 -r 36fd53b2e3b4 xen/arch/x86/hvm/hpet.c
> --- a/xen/arch/x86/hvm/hpet.c Wed Jan 10 11:09:21 2007 +0000
> +++ b/xen/arch/x86/hvm/hpet.c Wed Jan 10 14:14:30 2007 +0000
> @@ -356,8 +356,6 @@ static void hpet_timer_fn(void *opaque)
>          }
>          set_timer(&h->timers[tn], NOW() + hpet_tick_to_ns(h,
> h->period[tn]));
>      }
> -
> -    vcpu_kick(h->vcpu);
>  }
>  
>  void hpet_migrate_timers(struct vcpu *v)
> 
>  
>   --Tom
> 
> thomas.woller@xxxxxxx
> AMD Corporation
> 5204 E. Ben White Blvd. UBC1
> Austin, Texas 78741
> +1-512-602-0059
> 
> 
> 
> 
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