Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
[PATCH] boot_pageset must not be freed.
The boot_pageset needs to be preserved for hotplugging and for off line
processors and nodes. Otherwise pointers will point into memory that has
now a different use. /proc/zoneinfo is currently showing strange results
if processors / nodes are not present.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
authored by Christoph Lameter and committed by Linus Torvalds b7c84c6a a4936044
+9
-2
mm/page_alloc.c
+9
-2
mm/page_alloc.c
···
1742
* with interrupts disabled.
1743
*
1744
* Some NUMA counter updates may also be caught by the boot pagesets.
1745
-
* These will be discarded when bootup is complete.
1746
*/
1747
static struct per_cpu_pageset
1748
-
boot_pageset[NR_CPUS] __initdata;
1749
1750
/*
1751
* Dynamically allocate memory for the
···
1742
* with interrupts disabled.
1743
*
1744
* Some NUMA counter updates may also be caught by the boot pagesets.
1745
+
*
1746
+
* The boot_pagesets must be kept even after bootup is complete for
1747
+
* unused processors and/or zones. They do play a role for bootstrapping
1748
+
* hotplugged processors.
1749
+
*
1750
+
* zoneinfo_show() and maybe other functions do
1751
+
* not check if the processor is online before following the pageset pointer.
1752
+
* Other parts of the kernel may not check if the zone is available.
1753
*/
1754
static struct per_cpu_pageset
1755
+
boot_pageset[NR_CPUS];
1756
1757
/*
1758
* Dynamically allocate memory for the