Xen project Mailing List

On Mon, Nov 5, 2018 at 6:29 PM Rishi <2rushikeshj@xxxxxxxxx> wrote:

Yes, I'm taking out patches from 4.4 and actually do have a working 4.9 kernel along with blktap. Tested networking and disk IO in it.

There are roughly 415 patches to 4.4 out of which some ~210+ are already applied in 4.9 and ~220+ are already applied in 4.14. I dont have numbers for 4.19 yet.

Essentially I'm down to single digit number of patches atm to have a working setup for kernel 4.9. I know there would be mishaps since I'm not applying all patches but my experiment is to see how close can we stay near mainline kernel + what can be the patches that kernel.org can accept.

On Mon, Nov 5, 2018 at 6:19 PM Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
I forgot to say: please don't top-post.

On Mon, Nov 05, 2018 at 06:00:10PM +0530, Rishi wrote:
> I'm using a XenServer Host and XCP-NG on it as HVM. I used xencons=tty
> console=ttyS0 on XCP-NG dom0 kernel line, to obtain serial console.
> I'm working on to build a more recent dom0 kernel for improved support of
> Ceph in XenServer/XCP-NG.

This is an interesting setup. I don't think you can expect to just drop
in a new kernel to XenServer/XCP-NG and then it works flawlessly. What
did you do to the patch queue XenServer carries for 4.4?

Also, have you got a working baseline? I.e. did the stock 4.4 kernel
work?

Wei.

>
>
>
> On Mon, Nov 5, 2018 at 5:28 PM Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
>
> > On Mon, Nov 05, 2018 at 05:18:43PM +0530, Rishi wrote:
> > > Yes, I'm running it in a HVM domU for development purpose.
> >
> > What is your exact setup?
> >
> > Wei.
> >
> > >
> > > On Mon, Nov 5, 2018 at 5:11 PM Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
> > >
> > > > On Mon, Nov 05, 2018 at 04:58:35PM +0530, Rishi wrote:
> > > > > Alright, I got the serial console and following is the crash log.
> > Thank
> > > > you
> > > > > for pointing that out.
> > > > >
> > > > > [ 133.594852] watchdog: BUG: soft lockup - CPU#2 stuck for 22s!
> > > > > [ksoftirqd/2:22]
> > > > >
> > > > > [ 133.599232] Kernel panic - not syncing: softlockup: hung tasks
> > > > >
> > > > > [ 133.602275] CPU: 2 PID: 22 Comm: ksoftirqd/2 Tainted: G
> > > > > L 4.19.1
> > > > > #1
> > > > >
> > > > > [ 133.606620] Hardware name: Xen HVM domU, BIOS 4.4.1-xs132257
> > > > 12/12/2016
> > > >
> > > > Is this serial log from the host? It says it is running as a HVM DomU.
> > > > Maybe you have mistaken guest serial log with host serial log?
> > > >
> > > > This indicates your machine runs XenServer, which has its own patch
> > > > queues on top of upstream Xen. You may also want to report to xs-devel
> > > > mailing list.
> > > >
> > > > Wei.
> > > >
> >

Sorry, I'll take care of top post from onwards.

Re: [Xen-devel] Dom0 kernel 4.14 with SMP randomly crashing