From: David Hildenbrand <david@redhat.com>
To: Gautam Gala <ggala@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Gerald Schaefer <gerald.schaefer@linux.ibm.com>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org
Subject: Re: [PATCH] KVM: s390: Fix to clear PTE when discarding a swapped page
Date: Wed, 24 Sep 2025 14:22:05 +0200 [thread overview]
Message-ID: <dfc83821-f2ff-4b9c-b9cf-9dda89e8eb77@redhat.com> (raw)
In-Reply-To: <20250924121707.145350-1-ggala@linux.ibm.com>
On 24.09.25 14:17, Gautam Gala wrote:
> KVM run fails when guests with 'cmm' cpu feature and host are
> under memory pressure and use swap heavily. This is because
> npages becomes ENOMEN (out of memory) in hva_to_pfn_slow()
> which inturn propagates as EFAULT to qemu. Clearing the page
> table entry when discarding an address that maps to a swap
> entry resolves the issue.
>
> Suggested-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
> Signed-off-by: Gautam Gala <ggala@linux.ibm.com>
> ---
Sounds bad,
I assume we want Fixes: and CC: stable, right?
--
Cheers
David / dhildenb
next prev parent reply other threads:[~2025-09-24 12:22 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-24 12:17 [PATCH] KVM: s390: Fix to clear PTE when discarding a swapped page Gautam Gala
2025-09-24 12:22 ` David Hildenbrand [this message]
2025-09-24 12:31 ` Claudio Imbrenda
2025-09-27 17:14 ` kernel test robot
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