From: Andres Lagar-Cavilla Date: Mon, 22 Sep 2014 21:54:42 +0000 (-0700) Subject: kvm: Fix page ageing bugs X-Git-Tag: fixes-for-v3.18-merge-window~23^2~11 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=57128468080a8b6ea452223036d3e417f748af55;p=pandora-kernel.git kvm: Fix page ageing bugs 1. We were calling clear_flush_young_notify in unmap_one, but we are within an mmu notifier invalidate range scope. The spte exists no more (due to range_start) and the accessed bit info has already been propagated (due to kvm_pfn_set_accessed). Simply call clear_flush_young. 2. We clear_flush_young on a primary MMU PMD, but this may be mapped as a collection of PTEs by the secondary MMU (e.g. during log-dirty). This required expanding the interface of the clear_flush_young mmu notifier, so a lot of code has been trivially touched. 3. In the absence of shadow_accessed_mask (e.g. EPT A bit), we emulate the access bit by blowing the spte. This requires proper synchronizing with MMU notifier consumers, like every other removal of spte's does. Signed-off-by: Andres Lagar-Cavilla Acked-by: Rik van Riel Signed-off-by: Paolo Bonzini --- Reading git-diff-tree failed