But is there a manifest bug or not? What is the deal with Xen? Cyrill Gorcunov <gorcu...@gmail.com> wrote: >On Wed, Aug 21, 2013 at 09:25:47PM +0400, Cyrill Gorcunov wrote: >> > >> > However, I do find the use of PTE bits in this way somewhat >fragile. >> > What other potential corner cases might still remain that will >require >> > further games with PTE bits? >> >> OK, so this is not a bug finally. The problem is that 2 level pte >is >> quite small and 7th bit is the only one spare I can use for soft >dirty >> tracking when page get swapped out. And swap engine is very depending >> on pte being non-present, so we are on a safe side. > >To make it clear: I'm working on patch that won't use pse bit for dirty >page tracking, just give some time to cook it and test.
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