xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

memory hotplug: free memmaps allocated by bootmem

Browse Source 
This patch is to free memmaps which is allocated by bootmem.

Freeing usemap is not necessary.  The pages of usemap may be necessary for
other sections.

If removing section is last section on the node, its section is the final user
of usemap page.  (usemaps are allocated on its section by previous patch.) But
it shouldn't be freed too, because the section must be logical offline state
which all pages are isolated against page allocater.  If it is freed, page
alloctor may use it which will be removed physically soon.  It will be
disaster.  So, this patch keeps it as it is.

Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yasunori Goto
2008-04-28 02:13:34 -07:00
committed by Linus Torvalds
parent 86f6dae137
commit 0c0a4a517a
4 changed files with 60 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
mm/page_alloc.c
View File

@@ -546,7 +546,7 @@ static void __free_pages_ok(struct page *page, unsigned int order)
/*
* permit the bootmem allocator to evade page validation on high-order frees
*/
void __init __free_pages_bootmem(struct page *page, unsigned int order)
void __free_pages_bootmem(struct page *page, unsigned int order)
{
if (order == 0) {
__ClearPageReserved(page);