From: Sean Christopherson <seanjc@google.com>
To: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Cc: kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
linuxppc-dev@lists.ozlabs.org,
Michael Ellerman <mpe@ellerman.id.au>,
Christophe Leroy <chleroy@kernel.org>,
Anushree Mathur <anushree.mathur@linux.ibm.com>,
Venkat Rao Bagalkote <venkat88@linux.ibm.com>,
Harsh Prateek Bora <harshpb@linux.ibm.com>,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Shrikanth Hegde <sshegde@linux.ibm.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 6/9] KVM: selftests: Limit the number of VM creates in hardware_disable_test
Date: Fri, 2 Oct 2026 15:19:00 -0700 [thread overview]
Message-ID: <asAt1NhGFs5HNbvl@google.com> (raw)
In-Reply-To: <db32438dee67a69609e75d8c43cb070f021137b1.1790101179.git.ritesh.list@gmail.com>
On Tue, Sep 22, 2026, Ritesh Harjani (IBM) wrote:
> hardware_disable_test forks several VMs (NR_IERATIONS=512). This patch
> limits that number to 4 when we know that we are running in constraint
> host environment. The number 4 is just a safe minimum when
> kvm_arch_vm_create_may_enomem() can be true.
Please actually explain *why* this is necessary, and where the magic '4' comes.
I assume there's some system-wide resource at play?
next prev parent reply other threads:[~2026-10-02 22:19 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-22 18:28 [PATCH v5 0/9] KVM: selftests: add powerpc support Ritesh Harjani (IBM)
2026-09-22 18:28 ` [PATCH v5 1/9] KVM: PPC: selftests: add support for powerpc Ritesh Harjani (IBM)
2026-09-22 18:43 ` sashiko-bot
2026-09-29 1:11 ` Ritesh Harjani
2026-10-02 22:12 ` Sean Christopherson
2026-10-03 4:37 ` Ritesh Harjani
2026-09-22 18:28 ` [PATCH v5 2/9] KVM: selftests: Enable kvm_create_max_vcpus test " Ritesh Harjani (IBM)
2026-09-22 18:28 ` [PATCH v5 3/9] KVM: selftests: Don't limit LE dirty-bitmap bitops to s390x Ritesh Harjani (IBM)
2026-09-22 18:28 ` [PATCH v5 4/9] KVM: selftests: Split out a KVM_CREATE_VCPU helper that can fail Ritesh Harjani (IBM)
2026-09-22 18:28 ` [PATCH v5 5/9] KVM: selftests: Make kvm_create_max_vcpus tolerate ENOMEM Ritesh Harjani (IBM)
2026-10-02 22:16 ` Sean Christopherson
2026-10-03 5:45 ` Ritesh Harjani
2026-09-22 18:28 ` [PATCH v5 6/9] KVM: selftests: Limit the number of VM creates in hardware_disable_test Ritesh Harjani (IBM)
2026-10-02 22:19 ` Sean Christopherson [this message]
2026-10-03 6:01 ` Ritesh Harjani
2026-09-22 18:28 ` [PATCH v5 7/9] KVM: PPC: selftests: Make nested case on pseries LPARs as resource constrained Ritesh Harjani (IBM)
2026-09-22 18:28 ` [PATCH v5 8/9] KVM: PPC: selftests: Skip idle-page check when running nested on pseries LPAR Ritesh Harjani (IBM)
2026-09-22 18:28 ` [PATCH v5 9/9] KVM: selftests: Move memslot_perf_test off the 256M ELF load address Ritesh Harjani (IBM)
2026-10-02 22:28 ` Sean Christopherson
2026-09-29 1:35 ` [PATCH v5 0/9] KVM: selftests: add powerpc support Ritesh Harjani
2026-10-02 22:38 ` Sean Christopherson
2026-10-03 6:46 ` Ritesh Harjani
2026-10-05 2:39 ` Sean Christopherson
2026-10-05 4:25 ` Ritesh Harjani
2026-10-05 6:08 ` Sean Christopherson
2026-10-06 2:43 ` Ritesh Harjani
2026-09-29 5:49 ` Anushree Mathur
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