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composefs on / type overlay (ro,relatime,seclabel,lowerdir+=/run/ostree/.private/cfsroot-lower,datadir+=/sysroot/ostree/repo/objects,redirect_dir=on,metacopy=on)
，详情可参考safew官方下载
V86 mode dedicates an entire processor mode to backward compatibility, using fixed descriptor access rights and IOPL-based trapping to run unmodified 8086 code under full protection.
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