linux/kernel/power, branch v2.6.35.11

PM / Hibernate: Fix PM_POST_* notification with user-space suspend

2011-02-06T19:03:30Z

commit 1497dd1d29c6a53fcd3c80f7ac8d0e0239e7389e upstream. The user-space hibernation sends a wrong notification after the image restoration because of thinko for the file flag check. RDONLY corresponds to hibernation and WRONLY to restoration, confusingly. Signed-off-by: Takashi Iwai Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman Signed-off-by: Andi Kleen

PM / Hibernate: Fix memory corruption related to swap

2010-12-14T22:40:16Z

commit c9e664f1fdf34aa8cede047b206deaa8f1945af0 upstream. There is a problem that swap pages allocated before the creation of a hibernation image can be released and used for storing the contents of different memory pages while the image is being saved. Since the kernel stored in the image doesn't know of that, it causes memory corruption to occur after resume from hibernation, especially on systems with relatively small RAM that need to swap often. This issue can be addressed by keeping the GFP_IOFS bits clear in gfp_allowed_mask during the entire hibernation, including the saving of the image, until the system is finally turned off or the hibernation is aborted. Unfortunately, for this purpose it's necessary to rework the way in which the hibernate and suspend code manipulates gfp_allowed_mask. This change is based on an earlier patch from Hugh Dickins. Signed-off-by: Rafael J. Wysocki Reported-by: Ondrej Zary Acked-by: Hugh Dickins Signed-off-by: Andi Kleen Reviewed-by: KAMEZAWA Hiroyuki Signed-off-by: Greg Kroah-Hartman

PM / Hibernate: Avoid hitting OOM during preallocation of memory

2010-09-27T00:18:38Z

commit 6715045ddc7472a22be5e49d4047d2d89b391f45 upstream. There is a problem in hibernate_preallocate_memory() that it calls preallocate_image_memory() with an argument that may be greater than the total number of available non-highmem memory pages. If that's the case, the OOM condition is guaranteed to trigger, which in turn can cause significant slowdown to occur during hibernation. To avoid that, make preallocate_image_memory() adjust its argument before calling preallocate_image_pages(), so that the total number of saveable non-highem pages left is not less than the minimum size of a hibernation image. Change hibernate_preallocate_memory() to try to allocate from highmem if the number of pages allocated by preallocate_image_memory() is too low. Modify free_unnecessary_pages() to take all possible memory allocation patterns into account. Reported-by: KOSAKI Motohiro Signed-off-by: Rafael J. Wysocki Tested-by: M. Vefa Bicakci Signed-off-by: Greg Kroah-Hartman

suspend: Move NVS save/restore code to generic suspend functionality

2010-06-10T15:02:34Z

Saving platform non-volatile state may be required for suspend to RAM as well as hibernation. Move it to more generic code. Signed-off-by: Matthew Garrett Acked-by: Rafael J. Wysocki Tested-by: Maxim Levitsky Signed-off-by: Len Brown

PM / Hibernate: Fix block_io.c printk warning

2010-05-10T21:08:18Z

Fix printk format warning in block_io.c: kernel/power/block_io.c:41: warning: format '%ld' expects type 'long int', but argument 2 has type 'sector_t' Signed-off-by: Randy Dunlap Signed-off-by: Rafael J. Wysocki

PM / Hibernate: Group swap ops

2010-05-10T21:08:18Z

Move all the swap processing into one function. It will make swap calls from a non-swap code easier. Signed-off-by: Jiri Slaby Signed-off-by: Rafael J. Wysocki

PM / Hibernate: Move the first_sector out of swsusp_write

2010-05-10T21:08:18Z

The first sector knowledge is swap-only specific. Move it into the swap handle. This will be needed for later non-swap specific code moving into snapshot.c. Signed-off-by: Jiri Slaby Acked-by: Pavel Machek Signed-off-by: "Rafael J. Wysocki"

PM / Hibernate: Separate block_io

2010-05-10T21:08:18Z

Move block I/O operations to a separate file. It is because it will be used later not only by the swap writer. Signed-off-by: Jiri Slaby Signed-off-by: Rafael J. Wysocki

PM / Hibernate: Snapshot cleanup

2010-05-10T21:08:17Z

Remove support of reads with offset. This means snapshot_read/write_next now does not accept count parameter. It allows to clean up the functions and snapshot handle which no longer needs to care about offsets. /dev/snapshot handler is converted to simple_{read_from,write_to}_buffer which take care of offsets. Signed-off-by: Jiri Slaby Acked-by: Pavel Machek Signed-off-by: Rafael J. Wysocki

PM / Hibernate: user.c, fix SNAPSHOT_SET_SWAP_AREA handling

2010-04-10T20:28:56Z

When CONFIG_DEBUG_BLOCK_EXT_DEVT is set we decode the device improperly by old_decode_dev and it results in an error while hibernating with s2disk. All users already pass the new device number, so switch to new_decode_dev(). Signed-off-by: Jiri Slaby Reported-and-tested-by: Jiri Kosina Signed-off-by: "Rafael J. Wysocki"