On Tue, Oct 7, 2025 at 7:36 PM Mikhail Zaslonko <[email protected]>
wrote:

> Hi Tao,
>
> On 10/7/2025 1:11 AM, Tao Liu wrote:
> > On Tue, Sep 30, 2025 at 8:18 PM lijiang <[email protected]> wrote:
> >>
> >> On Tue, Sep 30, 2025 at 3:01 PM Mikhail Zaslonko <
> [email protected]> wrote:
> >>>
> >>> Hello,
> >>>
> >>> On 9/30/2025 4:53 AM, lijiang wrote:
> >>>> On Tue, Sep 30, 2025 at 2:18 AM Mikhail Zaslonko <
> [email protected]>
> >>>> wrote:
> >>>>
> >>>>> Hi Lianbo,
> >>>>>
> >>>>> It seems we have a problem printing disassembly blocks in the log
> after
> >>>>> this patch (at least on s390).
> >>>>> See number of empty lines printed below.
> >>>>>
> >>>>
> >>>> Can you try it with the following two patches?
> >>>> [1]
> >>>>
> https://www.mail-archive.com/[email protected]/msg01621.html
> >>> This patch is present on crash master, doesnt affect the issue.
> >>>> [2]
> >>>>
> https://www.mail-archive.com/[email protected]/msg01636.html
> >>>>
> >>> This one helps indeed! At least I do not se the blanks lines in my
> scenario.
> >>> BUT, if I use 'log -R' the blank lines are back again!
> >>
> >>
> >> Thanks for the information, Mikhail.
> >> Let me see how to debug this(although I can not reproduce it on s390x).
> >
> > I didn't reproduce the issue on my s390x machine either, maybe sharing
> > the vmcore to us can help.
>
> I'm not sure I'm allowed to send this data outside.
>
> Sorry for the late reply because of China holiday.

If you can share your test case(or steps), that will help me to reproduce
the current issue.

Anyway I will check it in detail.

I think the problem takes place for the logs printed with pr_cont() by the
> kernel (e.g. show_code() of arch/s390/kernel/dis.c for printing
> disassembly as
> in my sample).
>
> Thanks for the information.

Lianbo


>
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