From: Steffen Eiden <seiden@linux.ibm.com>
To: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-s390@vger.kernel.org, borntraeger@de.ibm.com,
frankja@linux.ibm.com, nrb@linux.ibm.com, gra@linux.ibm.com,
schlameuss@linux.ibm.com, hca@linux.ibm.com, david@kernel.org
Subject: Re: [PATCH v2 2/8] KVM: s390: Remove non-atomic dat_crstep_xchg()
Date: Mon, 23 Mar 2026 11:46:51 +0100 [thread overview]
Message-ID: <20260323104651.66303-B-seiden@linux.ibm.com> (raw)
In-Reply-To: <20260320161542.202913-3-imbrenda@linux.ibm.com>
On Fri, Mar 20, 2026 at 05:15:36PM +0100, Claudio Imbrenda wrote:
> In practice dat_crstep_xchg() is racy and hard to use correctly. Simply
> remove it and replace its uses with dat_crstep_xchg_atomic().
>
> This solves some actual races that lead to system hangs / crashes.
>
> Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
> Fixes: 589071eaaa8f ("KVM: s390: KVM page table management functions: clear and replace")
> Fixes: 94fd9b16cc67 ("KVM: s390: KVM page table management functions: lifecycle management")
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
next prev parent reply other threads:[~2026-03-23 10:46 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-20 16:15 [PATCH v2 0/8] KVM: s390: More memory management fixes Claudio Imbrenda
2026-03-20 16:15 ` [PATCH v2 1/8] KVM: s390: vsie: Fix dat_split_ste() Claudio Imbrenda
2026-03-23 10:46 ` Steffen Eiden
2026-03-23 13:43 ` Christoph Schlameuss
2026-03-24 12:57 ` Janosch Frank
2026-03-20 16:15 ` [PATCH v2 2/8] KVM: s390: Remove non-atomic dat_crstep_xchg() Claudio Imbrenda
2026-03-23 10:46 ` Steffen Eiden [this message]
2026-03-20 16:15 ` [PATCH v2 3/8] KVM: s390: vsie: Fix check for pre-existing shadow mapping Claudio Imbrenda
2026-03-23 10:47 ` Steffen Eiden
2026-03-24 13:14 ` Janosch Frank
2026-03-20 16:15 ` [PATCH v2 4/8] KVM: s390: Fix gmap_link() Claudio Imbrenda
2026-03-23 10:47 ` Steffen Eiden
2026-03-24 14:01 ` Janosch Frank
2026-03-20 16:15 ` [PATCH v2 5/8] KVM: s390: vsie: Fix refcount overflow for shadow gmaps Claudio Imbrenda
2026-03-23 10:49 ` Steffen Eiden
2026-03-24 14:35 ` Janosch Frank
2026-03-20 16:15 ` [PATCH v2 6/8] KVM: s390: vsie: Fix unshadowing while shadowing Claudio Imbrenda
2026-03-24 14:52 ` Janosch Frank
2026-03-24 15:28 ` Claudio Imbrenda
2026-03-20 16:15 ` [PATCH v2 7/8] KVM: s390: vsie: Fix guest page tables protection Claudio Imbrenda
2026-03-24 15:20 ` Janosch Frank
2026-03-20 16:15 ` [PATCH v2 8/8] KVM: s390: Fix KVM_S390_VCPU_FAULT ioctl Claudio Imbrenda
2026-03-23 11:10 ` Steffen Eiden
2026-03-24 8:47 ` Janosch Frank
2026-03-23 11:27 ` Christian Borntraeger
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