lkml.org 
[lkml]   [2008]   [Oct]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH] release memory regions in PAGES_PER_SECTION chunks
During hotplug memory remove, memory regions should be released
on a PAGES_PER_SECTION size chunks. This mirrors the code in
add_memory where resources are requested on a PAGES_PER_SECTION size.

Attempting to release the entire memory region fails because there is
not a single resource for the total number of pages being removed.
Instead the resources for the pages are split in PAGES_PER_SECTION
size chunks as requested during memory add.

Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com>
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>

---

Index: linux-2.6/mm/memory_hotplug.c
===================================================================
--- linux-2.6.orig/mm/memory_hotplug.c 2008-10-13 12:00:46.000000000 -0500
+++ linux-2.6/mm/memory_hotplug.c 2008-10-13 14:29:31.000000000 -0500
@@ -323,11 +323,11 @@
BUG_ON(phys_start_pfn & ~PAGE_SECTION_MASK);
BUG_ON(nr_pages % PAGES_PER_SECTION);

- release_mem_region(phys_start_pfn << PAGE_SHIFT, nr_pages * PAGE_SIZE);
-
sections_to_remove = nr_pages / PAGES_PER_SECTION;
for (i = 0; i < sections_to_remove; i++) {
unsigned long pfn = phys_start_pfn + i*PAGES_PER_SECTION;
+ release_mem_region(pfn << PAGE_SHIFT,
+ PAGES_PER_SECTION << PAGE_SHIFT);
ret = __remove_section(zone, __pfn_to_section(pfn));
if (ret)
break;

\
 
 \ /
  Last update: 2008-10-13 22:25    [W:0.030 / U:0.564 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site