Subject: + mm-vmalloc-only-call-setup_vmalloc_vm-only-in-__get_vm_area_node.patch added to -mm tree
To: zhangyanfei@xxxxxxxxxxxxxx,iamjoonsoo.kim@xxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 04 Jun 2013 13:56:01 -0700
The patch titled
Subject: mm, vmalloc: only call setup_vmalloc_vm() only in __get_vm_area_node()
has been added to the -mm tree. Its filename is
mm-vmalloc-only-call-setup_vmalloc_vm-only-in-__get_vm_area_node.patch
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From: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>
Subject: mm, vmalloc: only call setup_vmalloc_vm() only in __get_vm_area_node()
Now for insert_vmalloc_vm, it only calls the two functions:
- setup_vmalloc_vm: fill vm_struct and vmap_area instances
- clear_vm_unlist: clear VM_UNLIST bit in vm_struct->flags
So in __get_vm_area_node(), if VM_UNLIST bit unset in flags, that is the
else branch here, we don't need to clear VM_UNLIST bit for vm->flags since
this bit is obviously not set. That is to say, we could only call
setup_vmalloc_vm instead of insert_vmalloc_vm here. And then we could
even remove the if test here.
Signed-off-by: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>
Acked-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmalloc.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)
diff -puN mm/vmalloc.c~mm-vmalloc-only-call-setup_vmalloc_vm-only-in-__get_vm_area_node mm/vmalloc.c
--- a/mm/vmalloc.c~mm-vmalloc-only-call-setup_vmalloc_vm-only-in-__get_vm_area_node
+++ a/mm/vmalloc.c
@@ -1367,16 +1367,7 @@ static struct vm_struct *__get_vm_area_n
return NULL;
}
- /*
- * When this function is called from __vmalloc_node_range,
- * we add VM_UNLIST flag to avoid accessing uninitialized
- * members of vm_struct such as pages and nr_pages fields.
- * They will be set later.
- */
- if (flags & VM_UNLIST)
- setup_vmalloc_vm(area, va, flags, caller);
- else
- insert_vmalloc_vm(area, va, flags, caller);
+ setup_vmalloc_vm(area, va, flags, caller);
return area;
}
_
Patches currently in -mm which might be from zhangyanfei@xxxxxxxxxxxxxx are
linux-next.patch
ipvs-change-type-of-netns_ipvs-sysctl_sync_qlen_max.patch
vmcore-clean-up-read_vmcore.patch
vmcore-allocate-buffer-for-elf-headers-on-page-size-alignment.patch
vmcore-allocate-buffer-for-elf-headers-on-page-size-alignment-fix.patch
vmcore-treat-memory-chunks-referenced-by-pt_load-program-header-entries-in-page-size-boundary-in-vmcore_list.patch
vmalloc-make-find_vm_area-check-in-range.patch
vmalloc-introduce-remap_vmalloc_range_partial.patch
vmalloc-introduce-remap_vmalloc_range_partial-fix.patch
vmcore-allocate-elf-note-segment-in-the-2nd-kernel-vmalloc-memory.patch
vmcore-allocate-elf-note-segment-in-the-2nd-kernel-vmalloc-memory-fix.patch
vmcore-allow-user-process-to-remap-elf-note-segment-buffer.patch
vmcore-allow-user-process-to-remap-elf-note-segment-buffer-fix.patch
vmcore-calculate-vmcore-file-size-from-buffer-size-and-total-size-of-vmcore-objects.patch
vmcore-support-mmap-on-proc-vmcore.patch
vmcore-support-mmap-on-proc-vmcore-fix.patch
mm-remove-duplicated-call-of-get_pfn_range_for_nid.patch
mm-ia64-prepare-for-removing-num_physpages-and-simplify-mem_init.patch
mm-vmalloc-only-call-setup_vmalloc_vm-only-in-__get_vm_area_node.patch
mm-vmalloc-call-setup_vmalloc_vm-instead-of-insert_vmalloc_vm.patch
mm-vmalloc-remove-insert_vmalloc_vm.patch
dev-oldmem-remove-the-interface.patch
dev-oldmem-remove-the-interface-fix.patch
documentation-kdump-kdumptxt-remove-dev-oldmem-description.patch
mips-remove-savemaxmem-parameter-setup.patch
powerpc-remove-savemaxmem-parameter-setup.patch
ia64-remove-setting-for-saved_max_pfn.patch
s390-remove-setting-for-saved_max_pfn.patch
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