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charset="UTF-8" Content-Transfer-Encoding: quoted-printable 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 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=E2=80=99ve 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 afte= r > > many iterations, the bug occurs. > > > > [=E2=80=A6snip=E2=80=A6] > > Hi Johannes, > > Marc is going to be away for some time. > Is there any update here? > > Thanks! > --0000000000002a8488063783e5f2 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hello Alexander,

Apologies for the lack of updates. I am out myself until the 23rd. I&#= 39;ll dig into it when I get back if nobody beats me to it.

Thanks,
Johann= es

On Thu, Jun 12, 2025, 11:05 Alexander Gordeev <agordeev@linu= x.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 br= oken
> > 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=E2=80=99ve 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 aft= er
> many iterations, the bug occurs.
>
> [=E2=80=A6snip=E2=80=A6]

Hi Johannes,

Marc is going to be away for some time.
Is there any update here?

Thanks!
--0000000000002a8488063783e5f2--