Dave Voutila <[email protected]> writes:

> Diff related to vmctl reload below...

Shared diff on tech@, but with a correction. That correction shouldn't
matter for testing this one, but this version is not what I'd commit.

>
> Eric Augé <[email protected]> writes:
>
>> Hello,
>>
>> small questions regarding 2 things I noticed today:
>>
>> II == vmd guest: linux x86 host: openbsd/amd64 ==
>>
>> I had a running/installed x86 alpine linux virt VM running on vmm(4).
>> I "sysupgrade -s" 'd 2 days ago from my previous -current and the x86
>> guest just does not run anymore, I've tried reinstalling an
>> alpine-virt 3.22 x86, vmd goes to 100% CPU after a  minute or 2 when
>> booting the virt install ISO.
>>
>> https://dl-cdn.alpinelinux.org/alpine/v3.22/releases/x86/alpine-virt-3.22.1-x86.iso
>>
>> I had not run it for a while, so I am not sure when the behavior changed.
>> I am not sure if it's a me problem, or if anybody else experiences
>> similar symptoms on linux x86 guests on an amd64 OpenBSD host HV.
>>
>> I tried with OpenBSD i386 and it seems to run fine
>>
>> II == vmctl reload ==
>>
>> I noticed another thing, "vmctl reload" just stalls... and never ends
>> it seems to stall on recvmsg() from /var/run/vmd.sock
>> ---
>>   6808 vmctl    RET   kbind 0
>>   6808 vmctl    CALL  kbind(0x734d85a9f0e0,24,0xd4092a5288fecfd1)
>>   6808 vmctl    RET   kbind 0
>>   6808 vmctl    CALL  recvmsg(3,0x734d85a9f1d0,0)
>> ...
>> ---
>> Anyone experienced something similar ?
>> Any idea what I have missed?
>
> Try the below diff. You will need to rebuild both vmd and vmctl (as
> vmctl relies on shared header files from vmd).
>
>
> diff refs/heads/master refs/heads/vmd-vmctl-reload
> commit - adfd21e9d9de44ec58cb6572dda9c677e59b7964
> commit + 3d1793eea15f1aaedbdd89f0b64fc72af7e576a4
> blob - 581739abf59d3d1bf0d9e026817c955fc17e6fe8
> blob + 45d39356bb9d0bc9ce2a6f026f7b1fcbdb712711
> --- usr.sbin/vmd/proc.h
> +++ usr.sbin/vmd/proc.h
> @@ -26,6 +26,7 @@
>  #define _PROC_H
>
>  enum {
> +     IMSG_NONE = 0,
>       IMSG_CTL_OK,
>       IMSG_CTL_FAIL,
>       IMSG_CTL_VERBOSE,
> blob - f10b945b37f20e59ad961268a2d57a40c85fbe37
> blob + 8bc41dd280fadccc19d19297508672aa86057d50
> --- usr.sbin/vmd/virtio.c
> +++ usr.sbin/vmd/virtio.c
> @@ -807,7 +807,7 @@ vmmci_ack(struct virtio_dev *dev, unsigned int cmd)
>                * timeout to give the VM a chance to reboot before the
>                * timer is expired.
>                */
> -             if (v->cmd == 0) {
> +             if (v->cmd == IMSG_NONE) {
>                       log_debug("%s: vm %u requested shutdown", __func__,
>                           dev->vm_id);
>                       vm_pipe_send(&v->dev_pipe, VMMCI_SET_TIMEOUT_SHORT);
> blob - 6132f15735b54204e3743df3bd16827a62bc74b6
> blob + 627d0f3f3adbfda62025c08aa6b4ddd580dfcae0
> --- usr.sbin/vmd/vmd.c
> +++ usr.sbin/vmd/vmd.c
> @@ -91,7 +91,7 @@ int
>  vmd_dispatch_control(int fd, struct privsep_proc *p, struct imsg *imsg)
>  {
>       struct privsep                  *ps = p->p_ps;
> -     int                              res = 0, cmd = 0, verbose;
> +     int                              res = 0, cmd = IMSG_NONE, verbose;
>       unsigned int                     v = 0, flags;
>       struct vmop_create_params        vmc;
>       struct vmop_id                   vid;
> @@ -251,14 +251,13 @@ vmd_dispatch_control(int fd, struct privsep_proc *p, s
>               control_reset(&ps->ps_csock);
>               TAILQ_FOREACH(rcs, &ps->ps_rcsocks, cs_entry)
>                       control_reset(rcs);
> -             cmd = 0;
>               break;
>       default:
>               return (-1);
>       }
>
>       switch (cmd) {
> -     case 0:
> +     case IMSG_NONE:
>               break;
>       case IMSG_VMDOP_START_VM_RESPONSE:
>       case IMSG_VMDOP_TERMINATE_VM_RESPONSE:
> blob - 8a33e351745a63401ebff65e6d301766d1f883da
> blob + 08b51df37960de8964cfb2903af8a835da0b39cc
> --- usr.sbin/vmd/vmm.c
> +++ usr.sbin/vmd/vmm.c
> @@ -95,7 +95,7 @@ int
>  vmm_dispatch_parent(int fd, struct privsep_proc *p, struct imsg *imsg)
>  {
>       struct privsep          *ps = p->p_ps;
> -     int                      res = 0, cmd = 0, verbose;
> +     int                      res = 0, cmd = IMSG_NONE, verbose;
>       struct vmd_vm           *vm = NULL;
>       struct vm_terminate_params vtp;
>       struct vmop_id           vid;

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