Messages in this thread Patch in this message | | | Subject | Re: Another bug report for UML in latest Linux 2.6-BK repository. | Date | Wed, 17 Nov 2004 00:45:26 -0500 | From | Jeff Dike <> |
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aia21@cam.ac.uk said: > If I enable HIGHMEM in my .config (see my previous bug report for my > .config and just change HIGHMEM to enabled) compilation fails:
The patch below fixes it.
Jeff
Index: 2.6.9/arch/um/Kconfig =================================================================== --- 2.6.9.orig/arch/um/Kconfig 2004-11-16 21:25:38.000000000 -0500 +++ 2.6.9/arch/um/Kconfig 2004-11-16 21:44:53.000000000 -0500 @@ -224,7 +224,15 @@ config HIGHMEM bool "Highmem support" - depends on BROKEN + default n + help + This enables UML's highmem support. This allows UML to have + more physical memory than it can map into its virtual address + space. In tt mode, or with CONFIG_MODE_TT enabled, the limit is a + bit less than 512M. With CONFIG_MODE_TT disabled and + CONFIG_LOAD_LOW and CONFIG_STATIC_LINK enabled, the limit is + around 2.75G. + Enabling this option slows down UML, signficantly in skas mode. config KERNEL_STACK_ORDER int "Kernel stack size order" Index: 2.6.9/arch/um/kernel/mem.c =================================================================== --- 2.6.9.orig/arch/um/kernel/mem.c 2004-11-16 21:54:53.000000000 -0500 +++ 2.6.9/arch/um/kernel/mem.c 2004-11-16 21:55:45.000000000 -0500 @@ -68,7 +68,7 @@ max_low_pfn = (high_physmem - uml_physmem) >> PAGE_SHIFT; #ifdef CONFIG_HIGHMEM - highmem_start_page = phys_page(__pa(high_physmem)); + highmem_start_page = pfn_to_page(phys_to_pfn(__pa(high_physmem))); #endif /* clear the zero-page */ @@ -140,7 +140,7 @@ pgprot_t kmap_prot; #define kmap_get_fixmap_pte(vaddr) \ - pte_offset_kernel(pmd_offset(pml4_pgd_offset(pml4_offset_k(vaddr), + pte_offset_kernel(pmd_offset(pml4_pgd_offset(pml4_offset_k(vaddr), \ vaddr), (vaddr)), (vaddr)) void __init kmap_init(void) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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