The patch titled
vmemmap: generify initialisation via helpers
has been added to the -mm tree. Its filename is
generic-virtual-memmap-support-vmemmap-generify-initialisation-via-helpers.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: vmemmap: generify initialisation via helpers
From: Andy Whitcroft <[EMAIL PROTECTED]>
Convert the common vmemmap population into initialisation helpers for use by
architecture vmemmap populators. All architecture implementing the
SPARSEMEM_VMEMMAP variant supply an architecture specific vmemmap_populate()
initialiser, which may make use of the helpers.
This allows us to clean up and remove the initialisation Kconfig entries.
With this patch there is a single SPARSEMEM_VMEMMAP_ENABLE Kconfig option to
indicate use of that variant.
Signed-off-by: Andy Whitcroft <[EMAIL PROTECTED]>
Acked-by: Christoph Lameter <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
include/linux/mm.h | 9 +-
mm/Kconfig | 13 +++
mm/sparse-vmemmap.c | 161 ++++++++++++++++--------------------------
3 files changed, 84 insertions(+), 99 deletions(-)
diff -puN
include/linux/mm.h~generic-virtual-memmap-support-vmemmap-generify-initialisation-via-helpers
include/linux/mm.h
---
a/include/linux/mm.h~generic-virtual-memmap-support-vmemmap-generify-initialisation-via-helpers
+++ a/include/linux/mm.h
@@ -1217,10 +1217,15 @@ extern int randomize_va_space;
const char * arch_vma_name(struct vm_area_struct *vma);
struct page *sparse_early_mem_map_populate(unsigned long pnum, int nid);
-int vmemmap_populate(struct page *start_page, unsigned long pages, int node);
-int vmemmap_populate_pmd(pud_t *, unsigned long, unsigned long, int);
+pgd_t *vmemmap_pgd_populate(unsigned long addr, int node);
+pud_t *vmemmap_pud_populate(pgd_t *pgd, unsigned long addr, int node);
+pmd_t *vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int node);
+pte_t *vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node);
void *vmemmap_alloc_block(unsigned long size, int node);
void vmemmap_verify(pte_t *, int, unsigned long, unsigned long);
+int vmemmap_populate_basepages(struct page *start_page,
+ unsigned long pages, int node);
+int vmemmap_populate(struct page *start_page, unsigned long pages, int node);
#endif /* __KERNEL__ */
#endif /* _LINUX_MM_H */
diff -puN
mm/Kconfig~generic-virtual-memmap-support-vmemmap-generify-initialisation-via-helpers
mm/Kconfig
---
a/mm/Kconfig~generic-virtual-memmap-support-vmemmap-generify-initialisation-via-helpers
+++ a/mm/Kconfig
@@ -112,6 +112,19 @@ config SPARSEMEM_EXTREME
def_bool y
depends on SPARSEMEM && !SPARSEMEM_STATIC
+#
+# SPARSEMEM_VMEMMAP uses a virtually mapped mem_map to optimise pfn_to_page
+# and page_to_pfn. The most efficient option where kernel virtual space is
+# not under pressure.
+#
+config SPARSEMEM_VMEMMAP_ENABLE
+ def_bool n
+
+config SPARSEMEM_VMEMMAP
+ bool
+ depends on SPARSEMEM
+ default y if (SPARSEMEM_VMEMMAP_ENABLE)
+
# eventually, we can have this option just 'select SPARSEMEM'
config MEMORY_HOTPLUG
bool "Allow for memory hot-add"
diff -puN
mm/sparse-vmemmap.c~generic-virtual-memmap-support-vmemmap-generify-initialisation-via-helpers
mm/sparse-vmemmap.c
---
a/mm/sparse-vmemmap.c~generic-virtual-memmap-support-vmemmap-generify-initialisation-via-helpers
+++ a/mm/sparse-vmemmap.c
@@ -14,21 +14,8 @@
* case the overhead consists of a few additional pages that are
* allocated to create a view of memory for vmemmap.
*
- * Special Kconfig settings:
- *
- * CONFIG_ARCH_POPULATES_SPARSEMEM_VMEMMAP
- *
- * The architecture has its own functions to populate the memory
- * map and provides a vmemmap_populate function.
- *
- * CONFIG_ARCH_POPULATES_SPARSEMEM_VMEMMAP_PMD
- *
- * The architecture provides functions to populate the pmd level
- * of the vmemmap mappings. Allowing mappings using large pages
- * where available.
- *
- * If neither are set then PAGE_SIZE mappings are generated which
- * require one PTE/TLB per PAGE_SIZE chunk of the virtual memory map.
+ * The architecture is expected to provide a vmemmap_populate() function
+ * to instantiate the mapping.
*/
#include <linux/mm.h>
#include <linux/mmzone.h>
@@ -60,7 +47,6 @@ void * __meminit vmemmap_alloc_block(uns
__pa(MAX_DMA_ADDRESS));
}
-#ifndef CONFIG_ARCH_POPULATES_SPARSEMEM_VMEMMAP
void __meminit vmemmap_verify(pte_t *pte, int node,
unsigned long start, unsigned long end)
{
@@ -72,103 +58,84 @@ void __meminit vmemmap_verify(pte_t *pte
"page_structs\n", start, end - 1);
}
-#ifndef CONFIG_ARCH_POPULATES_SPARSEMEM_VMEMMAP_PMD
-static int __meminit vmemmap_populate_pte(pmd_t *pmd, unsigned long addr,
- unsigned long end, int node)
+pte_t * __meminit vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int
node)
{
- pte_t *pte;
-
- for (pte = pte_offset_kernel(pmd, addr); addr < end;
- pte++, addr += PAGE_SIZE)
- if (pte_none(*pte)) {
- pte_t entry;
- void *p = vmemmap_alloc_block(PAGE_SIZE, node);
- if (!p)
- return -ENOMEM;
-
- entry = pfn_pte(__pa(p) >> PAGE_SHIFT, PAGE_KERNEL);
- set_pte(pte, entry);
-
- } else
- vmemmap_verify(pte, node, addr + PAGE_SIZE, end);
-
- return 0;
+ pte_t *pte = pte_offset_kernel(pmd, addr);
+ if (pte_none(*pte)) {
+ pte_t entry;
+ void *p = vmemmap_alloc_block(PAGE_SIZE, node);
+ if (!p)
+ return 0;
+ entry = pfn_pte(__pa(p) >> PAGE_SHIFT, PAGE_KERNEL);
+ set_pte_at(&init_mm, addr, pte, entry);
+ }
+ return pte;
}
-int __meminit vmemmap_populate_pmd(pud_t *pud, unsigned long addr,
- unsigned long end, int node)
+pmd_t * __meminit vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int
node)
{
- pmd_t *pmd;
- int error = 0;
- unsigned long next;
-
- for (pmd = pmd_offset(pud, addr); addr < end && !error;
- pmd++, addr = next) {
- if (pmd_none(*pmd)) {
- void *p = vmemmap_alloc_block(PAGE_SIZE, node);
- if (!p)
- return -ENOMEM;
-
- pmd_populate_kernel(&init_mm, pmd, p);
- } else
- vmemmap_verify((pte_t *)pmd, node,
- pmd_addr_end(addr, end), end);
- next = pmd_addr_end(addr, end);
- error = vmemmap_populate_pte(pmd, addr, next, node);
+ pmd_t *pmd = pmd_offset(pud, addr);
+ if (pmd_none(*pmd)) {
+ void *p = vmemmap_alloc_block(PAGE_SIZE, node);
+ if (!p)
+ return 0;
+ pmd_populate_kernel(&init_mm, pmd, p);
}
- return error;
+ return pmd;
}
-#endif /* CONFIG_ARCH_POPULATES_SPARSEMEM_VMEMMAP_PMD */
-static int __meminit vmemmap_populate_pud(pgd_t *pgd, unsigned long addr,
- unsigned long end, int node)
+pud_t * __meminit vmemmap_pud_populate(pgd_t *pgd, unsigned long addr, int
node)
{
- pud_t *pud;
- int error = 0;
- unsigned long next;
+ pud_t *pud = pud_offset(pgd, addr);
+ if (pud_none(*pud)) {
+ void *p = vmemmap_alloc_block(PAGE_SIZE, node);
+ if (!p)
+ return 0;
+ pud_populate(&init_mm, pud, p);
+ }
+ return pud;
+}
- for (pud = pud_offset(pgd, addr); addr < end && !error;
- pud++, addr = next) {
- if (pud_none(*pud)) {
- void *p = vmemmap_alloc_block(PAGE_SIZE, node);
- if (!p)
- return -ENOMEM;
-
- pud_populate(&init_mm, pud, p);
- }
- next = pud_addr_end(addr, end);
- error = vmemmap_populate_pmd(pud, addr, next, node);
+pgd_t * __meminit vmemmap_pgd_populate(unsigned long addr, int node)
+{
+ pgd_t *pgd = pgd_offset_k(addr);
+ if (pgd_none(*pgd)) {
+ void *p = vmemmap_alloc_block(PAGE_SIZE, node);
+ if (!p)
+ return 0;
+ pgd_populate(&init_mm, pgd, p);
}
- return error;
+ return pgd;
}
-int __meminit vmemmap_populate(struct page *start_page,
- unsigned long nr, int node)
+int __meminit vmemmap_populate_basepages(struct page *start_page,
+ unsigned long size, int node)
{
- pgd_t *pgd;
unsigned long addr = (unsigned long)start_page;
- unsigned long end = (unsigned long)(start_page + nr);
- unsigned long next;
- int error = 0;
-
- printk(KERN_DEBUG "[%lx-%lx] Virtual memory section"
- " (%ld pages) node %d\n", addr, end - 1, nr, node);
-
- for (pgd = pgd_offset_k(addr); addr < end && !error;
- pgd++, addr = next) {
- if (pgd_none(*pgd)) {
- void *p = vmemmap_alloc_block(PAGE_SIZE, node);
- if (!p)
- return -ENOMEM;
-
- pgd_populate(&init_mm, pgd, p);
- }
- next = pgd_addr_end(addr,end);
- error = vmemmap_populate_pud(pgd, addr, next, node);
+ unsigned long end = (unsigned long)(start_page + size);
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+ pte_t *pte;
+
+ for (; addr < end; addr += PAGE_SIZE) {
+ pgd = vmemmap_pgd_populate(addr, node);
+ if (!pgd)
+ return -ENOMEM;
+ pud = vmemmap_pud_populate(pgd, addr, node);
+ if (!pud)
+ return -ENOMEM;
+ pmd = vmemmap_pmd_populate(pud, addr, node);
+ if (!pmd)
+ return -ENOMEM;
+ pte = vmemmap_pte_populate(pmd, addr, node);
+ if (!pte)
+ return -ENOMEM;
+ vmemmap_verify(pte, node, addr, addr + PAGE_SIZE);
}
- return error;
+
+ return 0;
}
-#endif /* !CONFIG_ARCH_POPULATES_SPARSEMEM_VMEMMAP */
struct page __init *sparse_early_mem_map_populate(unsigned long pnum, int nid)
{
_
Patches currently in -mm which might be from [EMAIL PROTECTED] are
sparsemem-ensure-we-initialise-the-node-mapping-for-sparsemem_static.patch
ensure-we-count-pages-transitioning-inactive-via-clear_active_flags.patch
wait-for-page-writeback-when-directly-reclaiming-contiguous-areas.patch
wait-for-page-writeback-when-directly-reclaiming-contiguous-areas-fix.patch
x86_64-get-mp_bus_to_node-as-early-v3.patch
x86_64-use-bus-conf-in-nb-conf-fun1-to-get-bus-range-on-node.patch
try-parent-numa_node-at-first-before-using-default.patch
net-use-numa_node-in-net_devcice-dev-instead-of-parent.patch
dma-use-dev_to_node-to-get-node-for-device-in-dma_alloc_pages.patch
sparsemem-clean-up-spelling-error-in-comments.patch
sparsemem-record-when-a-section-has-a-valid-mem_map.patch
sparsemem-record-when-a-section-has-a-valid-mem_map-fix.patch
generic-virtual-memmap-support-for-sparsemem.patch
generic-virtual-memmap-support-for-sparsemem-fix.patch
generic-virtual-memmap-support-for-sparsemem-remove-excess-debugging.patch
generic-virtual-memmap-support-for-sparsemem-simplify-initialisation-code-and-reduce-duplication.patch
generic-virtual-memmap-support-for-sparsemem-pull-out-the-vmemmap-code-into-its-own-file.patch
generic-virtual-memmap-support-vmemmap-generify-initialisation-via-helpers.patch
x86_64-sparsemem_vmemmap-2m-page-size-support.patch
x86_64-sparsemem_vmemmap-2m-page-size-support-ensure-end-of-section-memmap-is-initialised.patch
ia64-sparsemem_vmemmap-16k-page-size-support.patch
sparc64-sparsemem_vmemmap-support.patch
ppc64-sparsemem_vmemmap-support.patch
ppc64-sparsemem_vmemmap-support-vmemmap-ppc64-convert-vmm_-macros-to-a-real-function.patch
vmemmap-x86_64-convert-to-new-helper-based-initialisation.patch
vmemmap-ppc64-convert-to-new-config-options.patch
vmemmap-sparc64-convert-to-new-config-options.patch
vmemmap-ia64-convert-to-new-helper-based-initialisation.patch
add-a-bitmap-that-is-used-to-track-flags-affecting-a-block-of-pages.patch
add-a-configure-option-to-group-pages-by-mobility.patch
move-free-pages-between-lists-on-steal.patch
group-short-lived-and-reclaimable-kernel-allocations.patch
do-not-group-pages-by-mobility-type-on-low-memory-systems.patch
fix-corruption-of-memmap-on-ia64-sparsemem-when-mem_section-is-not-a-power-of-2.patch
fix-corruption-of-memmap-on-ia64-sparsemem-when-mem_section-is-not-a-power-of-2-fix.patch
bias-the-location-of-pages-freed-for-min_free_kbytes-in-the-same-max_order_nr_pages-blocks.patch
remove-page_group_by_mobility.patch
dont-group-high-order-atomic-allocations.patch
fix-calculation-in-move_freepages_block-for-counting-pages.patch
breakout-page_order-to-internalh-to-avoid-special-knowledge-of-the-buddy-allocator.patch
do-not-depend-on-max_order-when-grouping-pages-by-mobility.patch
print-out-statistics-in-relation-to-fragmentation-avoidance-to-proc-pagetypeinfo.patch
have-kswapd-keep-a-minimum-order-free-other-than-order-0.patch
only-check-absolute-watermarks-for-alloc_high-and-alloc_harder-allocations.patch
rename-gfp_high_movable-to-gfp_highuser_movable-prefetch.patch
page-owner-tracking-leak-detector.patch
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