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authorMichael S. Tsirkin <mst@redhat.com>2010-04-06 14:18:19 +0300
committerAurelien Jarno <aurelien@aurel32.net>2010-05-06 07:28:49 +0200
commit733f0b02c80c3a7106d8327a83948ab68db10ea7 (patch)
treed18117416943eefe7946444bb0ac256aa1ac51e5 /LICENSE
parent3e0650a9c95f343ca5da2b89dc4ad1cd67c2c2d7 (diff)
qemu: address todo comment in exec.c
exec.c has a comment 'XXX: optimize' for lduw_phys/stw_phys, so let's do it, along the lines of stl_phys. The reason to address 16 bit accesses specifically is that virtio relies on these accesses to be done atomically, using memset as we do now breaks this assumption, which is reported to cause qemu with kvm to read wrong index values under stress. https://bugzilla.redhat.com/show_bug.cgi?id=525323 Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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