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Message-Id: <1269427029-21000-9-git-send-email-yinghai@kernel.org>
Date: Wed, 24 Mar 2010 03:37:09 -0700
From: Yinghai Lu <yinghai@...nel.org>
To: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
Andrew Morton <akpm@...ux-foundation.org>,
David Miller <davem@...emloft.net>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 8/8] powerpc : use early_res/nobootmem
new early_res is extension for lmb, and it could be used to replace bootmem
also even could be used to simplify the bootmem path if needed.
--NOT TESTED--
Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
arch/powerpc/Kconfig | 14 ++++++++++++++
arch/powerpc/mm/mem.c | 23 +++++++++++++++++++++--
arch/powerpc/mm/numa.c | 11 ++++++++++-
3 files changed, 45 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 2e19500..307c3ef 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -52,6 +52,9 @@ config HAVE_SETUP_PER_CPU_AREA
config NEED_PER_CPU_EMBED_FIRST_CHUNK
def_bool PPC64
+config HAVE_EARLY_RES
+ def_bool y
+
config IRQ_PER_CPU
bool
default y
@@ -443,6 +446,17 @@ config ARCH_SPARSEMEM_DEFAULT
def_bool y
depends on (SMP && PPC_PSERIES) || PPC_PS3
+config NO_BOOTMEM
+ default y
+ bool "Disable Bootmem code"
+ ---help---
+ Use early_res directly instead of bootmem before slab is ready.
+ - allocator (buddy) [generic]
+ - early allocator (bootmem) [generic]
+ - very early allocator (reserve_early*()/lmb)
+ So reduce one layer between early allocator to final allocator
+
+
config ARCH_POPULATES_NODE_MAP
def_bool y
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 448f972..7004f9e 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -179,9 +179,11 @@ EXPORT_SYMBOL_GPL(walk_system_ram_range);
void __init do_init_bootmem(void)
{
unsigned long i;
- unsigned long start, bootmap_pages;
unsigned long total_pages;
+#ifndef CONFIG_NO_BOOTMEM
+ unsigned long start, bootmap_pages;
int boot_mapsize;
+#endif
max_low_pfn = max_pfn = lmb_end_of_DRAM() >> PAGE_SHIFT;
total_pages = (lmb_end_of_DRAM() - memstart_addr) >> PAGE_SHIFT;
@@ -189,7 +191,9 @@ void __init do_init_bootmem(void)
total_pages = total_lowmem >> PAGE_SHIFT;
max_low_pfn = lowmem_end_addr >> PAGE_SHIFT;
#endif
+ min_low_pfn = MEMORY_START >> PAGE_SHIFT;
+#ifndef CONFIG_NO_BOOTMEM
/*
* Find an area to use for the bootmem bitmap. Calculate the size of
* bitmap required as (Total Memory) / PAGE_SIZE / BITS_PER_BYTE.
@@ -199,8 +203,8 @@ void __init do_init_bootmem(void)
start = lmb_alloc(bootmap_pages << PAGE_SHIFT, PAGE_SIZE);
- min_low_pfn = MEMORY_START >> PAGE_SHIFT;
boot_mapsize = init_bootmem_node(NODE_DATA(0), start >> PAGE_SHIFT, min_low_pfn, max_low_pfn);
+#endif
/* Add active regions with valid PFNs */
for (i = 0; i < lmb.memory.cnt; i++) {
@@ -210,6 +214,7 @@ void __init do_init_bootmem(void)
add_active_range(0, start_pfn, end_pfn);
}
+#ifndef CONFIG_NO_BOOTMEM
/* Add all physical memory to the bootmem map, mark each area
* present.
*/
@@ -241,6 +246,7 @@ void __init do_init_bootmem(void)
BOOTMEM_DEFAULT);
#endif
+#endif
/* XXX need to clip this if using highmem? */
sparse_memory_present_with_active_regions(0);
@@ -311,6 +317,16 @@ void __init paging_init(void)
}
#endif /* ! CONFIG_NEED_MULTIPLE_NODES */
+u64 __init get_max_mapped(void)
+{
+ u64 end = max_low_pfn;
+
+ end <<= PAGE_SHIFT;
+
+ return end;
+}
+
+
void __init mem_init(void)
{
#ifdef CONFIG_NEED_MULTIPLE_NODES
@@ -337,6 +353,9 @@ void __init mem_init(void)
free_all_bootmem_node(NODE_DATA(nid));
}
}
+#ifdef CONFIG_NO_BOOTMEM
+ totalram_pages += free_all_memory_core_early(MAX_NUMNODES);
+#endif
#else
max_mapnr = max_pfn;
totalram_pages += free_all_bootmem();
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 64c0022..024c3ff 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -90,6 +90,7 @@ static int __cpuinit fake_numa_create_new_node(unsigned long end_pfn,
return 0;
}
+#ifndef CONFIG_NO_BOOTMEM
/*
* get_active_region_work_fn - A helper function for get_node_active_region
* Returns datax set to the start_pfn and end_pfn if they contain
@@ -131,6 +132,7 @@ static void __init get_node_active_region(unsigned long start_pfn,
node_ar->end_pfn = start_pfn;
work_with_active_regions(nid, get_active_region_work_fn, node_ar);
}
+#endif
static void __cpuinit map_cpu_to_node(int cpu, int node)
{
@@ -845,6 +847,7 @@ static struct notifier_block __cpuinitdata ppc64_numa_nb = {
.priority = 1 /* Must run before sched domains notifier. */
};
+#ifndef CONFIG_NO_BOOTMEM
static void mark_reserved_regions_for_nid(int nid)
{
struct pglist_data *node = NODE_DATA(nid);
@@ -911,7 +914,7 @@ static void mark_reserved_regions_for_nid(int nid)
}
}
}
-
+#endif
void __init do_init_bootmem(void)
{
@@ -932,8 +935,10 @@ void __init do_init_bootmem(void)
for_each_online_node(nid) {
unsigned long start_pfn, end_pfn;
+#ifndef CONFIG_NO_BOOTMEM
void *bootmem_vaddr;
unsigned long bootmap_pages;
+#endif
get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
@@ -951,7 +956,9 @@ void __init do_init_bootmem(void)
dbg("node %d\n", nid);
dbg("NODE_DATA() = %p\n", NODE_DATA(nid));
+#ifndef CONFIG_NO_BOOTMEM
NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
+#endif
NODE_DATA(nid)->node_start_pfn = start_pfn;
NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn;
@@ -961,6 +968,7 @@ void __init do_init_bootmem(void)
dbg("start_paddr = %lx\n", start_pfn << PAGE_SHIFT);
dbg("end_paddr = %lx\n", end_pfn << PAGE_SHIFT);
+#ifndef CONFIG_NO_BOOTMEM
bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
bootmem_vaddr = careful_zallocation(nid,
bootmap_pages << PAGE_SHIFT,
@@ -979,6 +987,7 @@ void __init do_init_bootmem(void)
* done correctly.
*/
mark_reserved_regions_for_nid(nid);
+#endif
sparse_memory_present_with_active_regions(nid);
}
--
1.6.4.2
--
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