KVM: MMU: track dirty page in speculative path properly
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From: Xiao Guangrong on 15 Jul 2010 22:10 Marcelo Tosatti wrote: >> It uses access bit to track both page accessed and page dirty, and it's rather cheap... > > Xiao, > > I don't understand it. What are you trying to achieve? > Marcelo, The issue which we try to fix in this patch is we mark the page dirty in speculative path, i'm not sure that after Lai's patch this bug is gone, if it's true, this patch is not needed anymore, otherwise the later patch is the cheaper way help us to fix this issue. In the later patch, we use pte.a to track whether the speculative mapping is accessed, if it's accessed, we mark the page dirty, just like tracking page-accessed. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |