user/sven/linux.git/kernel/power/snapshot.c, branch ipvs/droutbytes

pm: hibernation: simplify memory bitmap

2008-07-24T17:47:23Z

This patch simplifies the memory bitmap manipulations. - remove the member size in struct bm_block It is not necessary for struct bm_block to have the number of bit chunks that can be calculated by using end_pfn and start_pfn. - use find_next_bit() for memory_bm_next_pfn No need to invent the bitmap library only for the memory bitmap. Signed-off-by: Akinobu Mita Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Hibernation: Fix mark_nosave_pages()

2008-03-12T03:15:55Z

There is a problem in the hibernation code that triggers on some NUMA systems on which pfn_valid() returns 'true' for some PFNs that don't belong to any zone. Namely, there is a BUG_ON() in memory_bm_find_bit() that triggers for PFNs not belonging to any zone and passing the pfn_valid() test. On the affected systems it triggers when we mark PFNs reported by the platform as not saveable, because the PFNs in question belong to a region mapped directly using iorepam() (i.e. the ACPI data area) and they pass the pfn_valid() test. Modify memory_bm_find_bit() so that it returns an error if given PFN doesn't belong to any zone instead of crashing the kernel and ignore the result returned by it in mark_nosave_pages(), while marking the "nosave" memory regions. This doesn't affect the hibernation functionality, as we won't touch the PFNs in question anyway. http://bugzilla.kernel.org/show_bug.cgi?id=9966 . Signed-off-by: Rafael J. Wysocki Signed-off-by: Len Brown

Hibernation: Handle DEBUG_PAGEALLOC on x86

2008-02-21T07:15:28Z

Make hibernation work with CONFIG_DEBUG_PAGEALLOC set on x86, by checking if the pages to be copied are marked as present in the kernel mapping and temporarily marking them as present if that's not the case. No functional modifications are introduced if CONFIG_DEBUG_PAGEALLOC is unset. Signed-off-by: Rafael J. Wysocki Signed-off-by: Len Brown

Page allocator: clean up pcp draining functions

2008-02-05T17:44:17Z

- Add comments explaing how drain_pages() works. - Eliminate useless functions - Rename drain_all_local_pages to drain_all_pages(). It does drain all pages not only those of the local processor. - Eliminate useless interrupt off / on sequences. drain_pages() disables interrupts on its own. The execution thread is pinned to processor by the caller. So there is no need to disable interrupts. - Put drain_all_pages() declaration in gfp.h and remove the declarations from suspend.h and from mm/memory_hotplug.c - Make software suspend call drain_all_pages(). The draining of processor local pages is may not the right approach if software suspend wants to support SMP. If they call drain_all_pages then we can make drain_pages() static. [akpm@linux-foundation.org: fix build] Signed-off-by: Christoph Lameter Acked-by: Mel Gorman Cc: "Rafael J. Wysocki" Cc: Daniel Walker Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Hibernation: Update messages

2008-02-01T23:30:55Z

Make hibernation messages start with one common prefix "PM: " and use the word "hibernation" in the messages as a synonym of "suspend to disk". Turn some KERN_INFO messages into debug ones. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Len Brown

Hibernation: Move function prototypes to header

2008-02-01T23:30:53Z

This patch moves the prototypes of count_highmem_pages() and restore_highmem() to kernel/power/power.h Signed-off-by: Adrian Bunk Acked-by: Pavel Machek Signed-off-by: Rafael J. Wysocki Signed-off-by: Len Brown

Hibernation: Introduce SNAPSHOT_GET_IMAGE_SIZE ioctl

2008-02-01T23:30:52Z

Add a new ioctl, SNAPSHOT_GET_IMAGE_SIZE, returning the size of the (just created) hibernation image, to the hibernation userland interface. This ioctl is necessary so that the userland utilities using the interface need not access the hibernation image header, owned by the kernel, in order to obtain the size of the image. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Len Brown

trivial copy_data_pages() tidy up

2007-10-20T00:26:04Z

Change the loop style of copy_data_pages() to remove a duplicate condition. Signed-off-by: Fengguang Wu Acked-by: Rafael J. Wysocki Signed-off-by: Adrian Bunk

Hibernation: Arbitrary boot kernel support - generic code

2007-10-18T21:37:19Z

Add the bits needed for supporting arbitrary boot kernels to the common hibernation code. To support arbitrary boot kernels, make it possible to replace the 'struct new_utsname' and the kernel version in the hibernation image header by some architecture specific data that will be used to verify if the image is valid and to restore the image. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Hibernation: do not try to mark invalid PFNs as nosave

2007-08-11T22:47:40Z

On some systems some PFNs reported by the early initialization code as 'nosave' may be invalid. If we try to set the corresponding bits in the hibernation bitmap, BUG_ON() in memory_bm_find_bit() will be triggered and the system won't be able to boot (cf. https://bugzilla.novell.com/show_bug.cgi?id=296242). Prevent this from happening by verifying if the 'nosave' PFNs are valid in mark_nosave_pages(). Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds