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There is a low limit on the maximum memory slot number imposed by the kernel. On x86_64, that limit is 509. In order to delay hitting that limit, we attempt to use the lowest unused slot number. As memory regions are removed from the VM, the slot for that region is stored in a heap so that that slot number can quickly be reused next time a memory region is added. BUG=None TEST=finish a game of gnome-mahjong using virtio-wayland Change-Id: I786c2e2b8ff239c19b3c8a18bd0f6e8f8dc2acbf Reviewed-on: https://chromium-review.googlesource.com/740102 Commit-Ready: Stephen Barber <smbarber@chromium.org> Tested-by: Stephen Barber <smbarber@chromium.org> Tested-by: Zach Reizner <zachr@chromium.org> Reviewed-by: Stephen Barber <smbarber@chromium.org> Reviewed-by: Dylan Reid <dgreid@chromium.org> |
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