Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [PATCH] x86: Construct 32 bit boot time page tables in native format. | Date | Mon, 28 Jan 2008 23:02:50 +0100 |
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On Monday, 28 of January 2008, H. Peter Anvin wrote: > Rafael J. Wysocki wrote: > > On Monday, 28 of January 2008, Jeremy Fitzhardinge wrote: > >> Rafael J. Wysocki wrote: > >>> Actually, no. We only do that with the kernel code mapping which should be > >>> safe as long as TLBs are not flushed (and they aren't). > >>> > >> Er, what? Assuming the TLB will retain some mappings while you > >> overwrite the pagetable is a highly dubious prospect. Are you copying > >> the same values over, or something else? > > > > As long as a relocatable kernel is not used to restore a non-relocatable one > > (or vice versa), we're copying the same values over. > > > > So that case is deliberately considered broken?
Not deliberately, but the fix I had caused a regression. It's just a pending issue.
Rafael
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