Re: page type is 0, migratetype passed is 2 (nr=256)

[Johannes Weiner <hannes@cmpxchg.org>]

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Hello Alexander,

Apologies for the lack of updates. I am out myself until the 23rd. I'll dig
into it when I get back if nobody beats me to it.

Thanks,
Johannes

On Thu, Jun 12, 2025, 11:05 Alexander Gordeev <agordeev@linux.ibm.com>
wrote:

> On Tue, May 20, 2025 at 12:23:42PM +0200, Marc Hartmayer wrote:
> > On Mon, May 12, 2025 at 01:14 PM -0400, Johannes Weiner <
> hannes@cmpxchg.org> wrote:
> ...
> > > The weird thing is that the warning is from expand(), when the broken
> > > up chunks are put *back*. Marc, can you confirm that this is the only
> > > warning in dmesg, and there aren't any before this one?
> >
> > Yep, I’ve just checked, it was the first warning and `panic_on_warn` is
> > set to 1.
> >
> > I managed to reproduce a similar crash using 6.15.0-rc7 (this time THP
> > seems to be involved):
> ...
> > This time, the setup is even simpler:
> >
> > 1. Start a 2GB QEMU/KVM guest
> > 2. Now run some memory stress test
> >
> > I run this test in a loop (with starting/shutting down the VM) and after
> > many iterations, the bug occurs.
> >
> > […snip…]
>
> Hi Johannes,
>
> Marc is going to be away for some time.
> Is there any update here?
>
> Thanks!
>

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