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From: | Alexander Graf |
Subject: | Re: [Qemu-devel] spapr guests warn "System page size 0x2000 is not enabled in page_size_mask (0x11000). Performance may be slow" on SPARC hosts |
Date: | Mon, 19 Jun 2017 11:39:57 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.6.0 |
On 06/15/2017 03:33 PM, Peter Maydell wrote:
I've just noticed that on a SPARC host, some of the PPC guests warn during make check: /ppc64/prom-env/pseries: qemu-system-ppc64: System page size 0x2000 is not enabled in page_size_mask (0x11000). Performance may be slow Is this really a performance problem on a TCG guest? It makes the 'make check' output a bit noisy, but not unbearably so.
From what I can tell this really only affects DDW which should be page size agnostic when only using emulated devices. Maybe Alexey thought of using VFIO-pci devices in a TCG guest?
Alex
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