From: Bharata B Rao <bharata@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, kvm-ppc@vger.kernel.org,
linux-mm@kvack.org
Cc: paulus@au1.ibm.com, aneesh.kumar@linux.vnet.ibm.com,
jglisse@redhat.com, cclaudio@linux.ibm.com, linuxram@us.ibm.com,
sukadev@linux.vnet.ibm.com, hch@lst.de,
Paul Mackerras <paulus@ozlabs.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Hugh Dickins <hughd@google.com>
Subject: Re: [PATCH v11 1/7] mm: ksm: Export ksm_madvise()
Date: Mon, 25 Nov 2019 08:39:58 +0530 [thread overview]
Message-ID: <20191125030958.GD23438@in.ibm.com> (raw)
In-Reply-To: <20191125030631.7716-2-bharata@linux.ibm.com>
On Mon, Nov 25, 2019 at 08:36:25AM +0530, Bharata B Rao wrote:
> On PEF-enabled POWER platforms that support running of secure guests,
> secure pages of the guest are represented by device private pages
> in the host. Such pages needn't participate in KSM merging. This is
> achieved by using ksm_madvise() call which need to be exported
> since KVM PPC can be a kernel module.
>
> Signed-off-by: Bharata B Rao <bharata@linux.ibm.com>
> Acked-by: Paul Mackerras <paulus@ozlabs.org>
> Cc: Andrea Arcangeli <aarcange@redhat.com>
> Cc: Hugh Dickins <hughd@google.com>
Just want to point out that I observe a kernel crash when KSM is
dealing with device private pages. More details about the crash here:
https://lore.kernel.org/linuxppc-dev/20191115141006.GA21409@in.ibm.com/
Regards,
Bharata.
next prev parent reply other threads:[~2019-11-25 3:10 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-25 3:06 [PATCH v11 0/7] KVM: PPC: Driver to manage pages of secure guest Bharata B Rao
2019-11-25 3:06 ` [PATCH v11 1/7] mm: ksm: Export ksm_madvise() Bharata B Rao
2019-11-25 3:09 ` Bharata B Rao [this message]
2019-11-27 3:59 ` Hugh Dickins
2019-11-27 6:53 ` Bharata B Rao
2019-11-25 3:06 ` [PATCH v11 2/7] KVM: PPC: Support for running secure guests Bharata B Rao
2019-11-25 3:06 ` [PATCH v11 3/7] KVM: PPC: Shared pages support for " Bharata B Rao
2019-11-25 3:06 ` [PATCH v11 4/7] KVM: PPC: Radix changes for secure guest Bharata B Rao
2019-11-25 3:06 ` [PATCH v11 5/7] KVM: PPC: Handle memory plug/unplug to secure VM Bharata B Rao
2019-11-25 3:06 ` [PATCH v11 6/7] KVM: PPC: Support reset of secure guest Bharata B Rao
2019-11-25 3:06 ` [PATCH v11 7/7] KVM: PPC: Ultravisor: Add PPC_UV config option Bharata B Rao
2019-11-28 5:04 ` [PATCH v11 0/7] KVM: PPC: Driver to manage pages of secure guest Bharata B Rao
2019-12-01 20:24 ` Hugh Dickins
2019-12-03 9:44 ` Bharata B Rao
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