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SubjectRe: [PATCH 1/5] generic __remove_pages() support
On Thu, 06 Mar 2008 10:55:34 -0800 Badari Pulavarty wrote:

> Generic helper function to remove section mappings and sysfs entries
> for the section of the memory we are removing. offline_pages() correctly
> adjusted zone and marked the pages reserved.

Such generic (exported, non-static) interfaces could use some
(kernel-)docs, please.

> Issue: If mem_map, usemap allocation could come from different places -
> kmalloc, vmalloc, alloc_pages or bootmem. There is no easy way
> to find and free up bootmem allocations.
>
> Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
>
> ---
> include/linux/memory_hotplug.h | 4 +++
> mm/memory_hotplug.c | 44 +++++++++++++++++++++++++++++++++++++++++
> mm/sparse.c | 43 +++++++++++++++++++++++++++++++++++++---
> 3 files changed, 88 insertions(+), 3 deletions(-)

> Index: linux-2.6.25-rc2/include/linux/memory_hotplug.h
> ===================================================================
> --- linux-2.6.25-rc2.orig/include/linux/memory_hotplug.h 2008-02-27 12:58:17.000000000 -0800
> +++ linux-2.6.25-rc2/include/linux/memory_hotplug.h 2008-02-27 13:00:04.000000000 -0800
> @@ -64,6 +65,8 @@ extern int offline_pages(unsigned long,
> /* reasonably generic interface to expand the physical pages in a zone */
> extern int __add_pages(struct zone *zone, unsigned long start_pfn,
> unsigned long nr_pages);
> +extern int __remove_pages(struct zone *zone, unsigned long start_pfn,
> + unsigned long nr_pages);
>
> /*
> * Walk thorugh all memory which is registered as resource.

through :)

---
~Randy


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