[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 0/3] x86: remove x86_init.mapping.pagetable_reserve
Currently find_early_table_space calculates an overestimate of how much memory the pagetable for 1:1 mapping is going to need. After kernel_physical_mapping_init completes we know exactly how much memory we used so we memblock reserve only the used memory and "free" the rest. This patch series modifies find_early_table_space to calculate the exact amount of memory we need for the 1:1 mapping, so that we can memblock reverve it right away and we don't need to free the unused memory after kernel_physical_mapping_init. At this point we can also safely revert "x86,xen: introduce x86_init.mapping.pagetable_reserve". The list of patches with diffstat follows: Stefano Stabellini (3): x86: calculate precisely the memory needed by init_memory_mapping Revert "x86,xen: introduce x86_init.mapping.pagetable_reserve" x86: move memblock_x86_reserve_range PGTABLE to find_early_table_space arch/x86/include/asm/pgtable_types.h | 1 - arch/x86/include/asm/x86_init.h | 12 ----- arch/x86/kernel/x86_init.c | 4 -- arch/x86/mm/init.c | 87 +++++++++++++++++++--------------- arch/x86/xen/mmu.c | 15 ------ 5 files changed, 49 insertions(+), 70 deletions(-) Many thanks to Konrad that helped me review the patch series and performed an impressive amount of tests: *Configurations baremetal Linux 64-bit baremetal Linux 32-bit NOHIGHMEM, HIGHMEM4G and HIGHMEM64G 32-bit and 64-bit Linux on Xen 32-bit and 64-bit Linux HVM on Xen *Hardware AMD development box (Tilapia) - 8GB AMD BIOSTAR Grp N61PB-M2S/N61PB-M2S (Sempron) - 4GB Intel DX58SO (Core i7) - 8GB Supermicro X7DB8/X7DB8 (Harpertown) - 4GB IBM x3850 (Cranford) - 8GB MSI MS-7680/H61M-P23 (MS-7680) (SandyBridge, i2500)- 8GB A git branch based on 3.0-rc1 is available here: git://xenbits.xen.org/people/sstabellini/linux-pvhvm.git 3.0-rc1-rem_pg_reserve-4 - Stefano _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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