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Date: Fri, 7 Mar 2008 10:07:18 +0100 (CET)
From: Andi Kleen <andi@...stfloor.org>
To: linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH] [8/13] Enable the mask allocator for x86
- Disable old ZONE_DMA
No fixed size ZONE_DMA now anymore. All existing users of __GFP_DMA rely
on the compat call to the maskable allocator in alloc/free_pages
- Call maskable allocator initialization functions at boot
- Add TRAD_DMA_MASK for the compat functions
- Remove dma_reserve call
Signed-off-by: Andi Kleen <ak@...e.de>
---
arch/x86/Kconfig | 4 ++--
arch/x86/kernel/setup_32.c | 3 +--
arch/x86/kernel/setup_64.c | 1 +
arch/x86/mm/discontig_32.c | 2 --
arch/x86/mm/init_32.c | 2 ++
arch/x86/mm/init_64.c | 9 ++-------
arch/x86/mm/numa_64.c | 1 -
include/asm-x86/dma.h | 2 ++
8 files changed, 10 insertions(+), 14 deletions(-)
Index: linux/arch/x86/kernel/setup_64.c
===================================================================
--- linux.orig/arch/x86/kernel/setup_64.c
+++ linux/arch/x86/kernel/setup_64.c
@@ -425,6 +425,7 @@ void __init setup_arch(char **cmdline_p)
}
#endif
reserve_crashkernel();
+ init_mask_zone(__pa(MAX_DMA_ADDRESS));
paging_init();
map_vsyscall();
Index: linux/arch/x86/kernel/setup_32.c
===================================================================
--- linux.orig/arch/x86/kernel/setup_32.c
+++ linux/arch/x86/kernel/setup_32.c
@@ -438,8 +438,6 @@ void __init zone_sizes_init(void)
{
unsigned long max_zone_pfns[MAX_NR_ZONES];
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
- max_zone_pfns[ZONE_DMA] =
- virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
#ifdef CONFIG_HIGHMEM
max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
@@ -811,6 +809,7 @@ void __init setup_arch(char **cmdline_p)
* NOTE: at this point the bootmem allocator is fully available.
*/
+ init_mask_zone(__pa(MAX_DMA_ADDRESS));
#ifdef CONFIG_BLK_DEV_INITRD
relocate_initrd();
#endif
Index: linux/arch/x86/mm/init_64.c
===================================================================
--- linux.orig/arch/x86/mm/init_64.c
+++ linux/arch/x86/mm/init_64.c
@@ -50,8 +50,6 @@
const struct dma_mapping_ops *dma_ops;
EXPORT_SYMBOL(dma_ops);
-static unsigned long dma_reserve __initdata;
-
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
/*
@@ -451,7 +449,6 @@ void __init paging_init(void)
unsigned long max_zone_pfns[MAX_NR_ZONES];
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
- max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
max_zone_pfns[ZONE_NORMAL] = end_pfn;
@@ -514,6 +511,8 @@ void __init mem_init(void)
pci_iommu_alloc();
+ prepare_mask_zone();
+
/* clear_bss() already clear the empty_zero_page */
reservedpages = 0;
@@ -671,10 +670,6 @@ void __init reserve_bootmem_generic(unsi
#else
reserve_bootmem(phys, len, BOOTMEM_DEFAULT);
#endif
- if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) {
- dma_reserve += len / PAGE_SIZE;
- set_dma_reserve(dma_reserve);
- }
}
int kern_addr_valid(unsigned long addr)
Index: linux/arch/x86/mm/numa_64.c
===================================================================
--- linux.orig/arch/x86/mm/numa_64.c
+++ linux/arch/x86/mm/numa_64.c
@@ -575,7 +575,6 @@ void __init paging_init(void)
unsigned long max_zone_pfns[MAX_NR_ZONES];
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
- max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
max_zone_pfns[ZONE_NORMAL] = end_pfn;
Index: linux/arch/x86/Kconfig
===================================================================
--- linux.orig/arch/x86/Kconfig
+++ linux/arch/x86/Kconfig
@@ -63,8 +63,8 @@ config FAST_CMPXCHG_LOCAL
config MMU
def_bool y
-config ZONE_DMA
- def_bool y
+config MASK_ALLOC
+ def_bool y
config QUICKLIST
def_bool X86_32
Index: linux/arch/x86/mm/discontig_32.c
===================================================================
--- linux.orig/arch/x86/mm/discontig_32.c
+++ linux/arch/x86/mm/discontig_32.c
@@ -400,8 +400,6 @@ void __init zone_sizes_init(void)
int nid;
unsigned long max_zone_pfns[MAX_NR_ZONES];
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
- max_zone_pfns[ZONE_DMA] =
- virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
#ifdef CONFIG_HIGHMEM
max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
Index: linux/include/asm-x86/dma.h
===================================================================
--- linux.orig/include/asm-x86/dma.h
+++ linux/include/asm-x86/dma.h
@@ -316,4 +316,6 @@ extern int isa_dma_bridge_buggy;
#define isa_dma_bridge_buggy (0)
#endif
+#define TRAD_DMA_MASK 0xffffff /* 16MB, 24bit */
+
#endif /* _ASM_X86_DMA_H */
Index: linux/arch/x86/mm/init_32.c
===================================================================
--- linux.orig/arch/x86/mm/init_32.c
+++ linux/arch/x86/mm/init_32.c
@@ -571,6 +571,8 @@ void __init mem_init(void)
int codesize, reservedpages, datasize, initsize;
int tmp, bad_ppro;
+ prepare_mask_zone();
+
#ifdef CONFIG_FLATMEM
BUG_ON(!mem_map);
#endif
--
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