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| author | Yinghai Lu <yhlu.kernel@gmail.com> | 2008-07-08 18:56:38 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-09 10:43:25 +0200 |
| commit | 2dc807b37b7b8c7df445513ad2b415df4ebcaf6d (patch) | |
| tree | a28cb322758351c9549c1e73f1ebcad3d85913e2 | |
| parent | 49c980df552499e5e8595b52448f612fdab0484a (diff) | |
| download | blackbird-op-linux-2dc807b37b7b8c7df445513ad2b415df4ebcaf6d.tar.gz blackbird-op-linux-2dc807b37b7b8c7df445513ad2b415df4ebcaf6d.zip | |
x86: make max_pfn cover acpi table below 4g
When system have 4g less ram installed, and acpi table sit
near end of ram, make max_pfn cover them too,
so 64bit kernel don't need to mess up fixmap.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: "Suresh Siddha" <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/kernel/e820.c | 18 | ||||
| -rw-r--r-- | arch/x86/kernel/setup.c | 13 | ||||
| -rw-r--r-- | include/asm-x86/e820.h | 2 |
3 files changed, 16 insertions, 17 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index e07d4019e266..2e08619a9c5c 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -1056,12 +1056,20 @@ unsigned long __initdata end_user_pfn = MAX_ARCH_PFN; /* * Find the highest page frame number we have available */ -unsigned long __init e820_end_of_ram(void) +unsigned long __init e820_end(void) { - unsigned long last_pfn; + int i; + unsigned long last_pfn = 0; unsigned long max_arch_pfn = MAX_ARCH_PFN; - last_pfn = find_max_pfn_with_active_regions(); + for (i = 0; i < e820.nr_map; i++) { + struct e820entry *ei = &e820.map[i]; + unsigned long end_pfn; + + end_pfn = (ei->addr + ei->size) >> PAGE_SHIFT; + if (end_pfn > last_pfn) + last_pfn = end_pfn; + } if (last_pfn > max_arch_pfn) last_pfn = max_arch_pfn; @@ -1192,9 +1200,7 @@ static int __init parse_memmap_opt(char *p) * the real mem size before original memory map is * reset. */ - e820_register_active_regions(0, 0, -1UL); - saved_max_pfn = e820_end_of_ram(); - remove_all_active_ranges(); + saved_max_pfn = e820_end(); #endif e820.nr_map = 0; userdef = 1; diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index bea8ae77d059..a7c3471ea17c 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -709,22 +709,18 @@ void __init setup_arch(char **cmdline_p) early_gart_iommu_check(); #endif - e820_register_active_regions(0, 0, -1UL); /* * partially used pages are not usable - thus * we are rounding upwards: */ - max_pfn = e820_end_of_ram(); + max_pfn = e820_end(); /* preallocate 4k for mptable mpc */ early_reserve_e820_mpc_new(); /* update e820 for memory not covered by WB MTRRs */ mtrr_bp_init(); - if (mtrr_trim_uncached_memory(max_pfn)) { - remove_all_active_ranges(); - e820_register_active_regions(0, 0, -1UL); - max_pfn = e820_end_of_ram(); - } + if (mtrr_trim_uncached_memory(max_pfn)) + max_pfn = e820_end(); #ifdef CONFIG_X86_32 /* max_low_pfn get updated here */ @@ -767,9 +763,6 @@ void __init setup_arch(char **cmdline_p) */ acpi_boot_table_init(); - /* Remove active ranges so rediscovery with NUMA-awareness happens */ - remove_all_active_ranges(); - #ifdef CONFIG_ACPI_NUMA /* * Parse SRAT to discover nodes. diff --git a/include/asm-x86/e820.h b/include/asm-x86/e820.h index a20d0a7f5892..78c03d7bf441 100644 --- a/include/asm-x86/e820.h +++ b/include/asm-x86/e820.h @@ -99,7 +99,7 @@ extern void free_early(u64 start, u64 end); extern void early_res_to_bootmem(u64 start, u64 end); extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align); -extern unsigned long e820_end_of_ram(void); +extern unsigned long e820_end(void); extern int e820_find_active_region(const struct e820entry *ei, unsigned long start_pfn, unsigned long last_pfn, |
