[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 0/4] xen: critical bug fixes for 2.6.39-rc3
Hi all, this is a small collection of critical xen bug fixes for 2.6.39-rc3: the recent changes to the initial kernel pagetable allocation mechanism (4b239f458c229de044d6905c2b0f9fe16ed9e01e in particular) caused a number of issues on Xen. This patch series fixes those issues and it is required just to boot a 2.6.39 linux kernel as regular xen guest. The list of patches with a diffstat follows: Stefano Stabellini (4): xen: mask_rw_pte mark RO all pagetable pages up to pgt_buf_top x86,xen: introduce x86_init.mapping.pagetable_reserve xen: more debugging in the e820 parsing xen: do not create the extra e820 region at an addr lower than 4G arch/x86/include/asm/pgtable_types.h | 1 + arch/x86/include/asm/x86_init.h | 9 +++++++++ arch/x86/kernel/x86_init.c | 4 ++++ arch/x86/mm/init.c | 9 +++++++-- arch/x86/xen/mmu.c | 17 ++++++++++++++++- arch/x86/xen/setup.c | 6 +++++- 6 files changed, 42 insertions(+), 4 deletions(-) The first two commits make sure pagetable pages are marked RO while other pages are marked RW. The third commit adds a couple of useful debugging statements. The fourth commit fixes a boot crash on xen when booting as initial domain: the xen extra memory region shouldn't start below 4G otherwise e820_end_of_low_ram_pfn() could return an address above 4G. As a consequence init_memory_mapping would end up mapping MMIO regions without going through the fixmap. A git branch with this series is available here: git://xenbits.xen.org/people/sstabellini/linux-pvhvm.git 2.6.39-rc3-fixes Comments are welcome. - Stefano _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
|
![]() |
Lists.xenproject.org is hosted with RackSpace, monitoring our |