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author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-05-20 15:36:52 +1000 |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-05-20 15:36:52 +1000 |
commit | 880102e78547c1db158a17e36cf0cdd98e7ad710 (patch) | |
tree | 3fff9cc54c44dafe275cfabefb96c589e08d971d /kernel/power/snapshot.c | |
parent | 3d07f0e83d4323d2cd45cc583f7cf1957aca3cac (diff) | |
parent | 39ab05c8e0b519ff0a04a869f065746e6e8c3d95 (diff) | |
download | kernel_samsung_aries-880102e78547c1db158a17e36cf0cdd98e7ad710.zip kernel_samsung_aries-880102e78547c1db158a17e36cf0cdd98e7ad710.tar.gz kernel_samsung_aries-880102e78547c1db158a17e36cf0cdd98e7ad710.tar.bz2 |
Merge remote branch 'origin/master' into merge
Manual merge of arch/powerpc/kernel/smp.c and add missing scheduler_ipi()
call to arch/powerpc/platforms/cell/interrupt.c
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'kernel/power/snapshot.c')
-rw-r--r-- | kernel/power/snapshot.c | 33 |
1 files changed, 24 insertions, 9 deletions
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index ca0aacc..ace5588 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -41,16 +41,28 @@ static void swsusp_set_page_forbidden(struct page *); static void swsusp_unset_page_forbidden(struct page *); /* + * Number of bytes to reserve for memory allocations made by device drivers + * from their ->freeze() and ->freeze_noirq() callbacks so that they don't + * cause image creation to fail (tunable via /sys/power/reserved_size). + */ +unsigned long reserved_size; + +void __init hibernate_reserved_size_init(void) +{ + reserved_size = SPARE_PAGES * PAGE_SIZE; +} + +/* * Preferred image size in bytes (tunable via /sys/power/image_size). - * When it is set to N, the image creating code will do its best to - * ensure the image size will not exceed N bytes, but if that is - * impossible, it will try to create the smallest image possible. + * When it is set to N, swsusp will do its best to ensure the image + * size will not exceed N bytes, but if that is impossible, it will + * try to create the smallest image possible. */ unsigned long image_size; void __init hibernate_image_size_init(void) { - image_size = (totalram_pages / 3) * PAGE_SIZE; + image_size = ((totalram_pages * 2) / 5) * PAGE_SIZE; } /* List of PBEs needed for restoring the pages that were allocated before @@ -1263,11 +1275,13 @@ static unsigned long minimum_image_size(unsigned long saveable) * frame in use. We also need a number of page frames to be free during * hibernation for allocations made while saving the image and for device * drivers, in case they need to allocate memory from their hibernation - * callbacks (these two numbers are given by PAGES_FOR_IO and SPARE_PAGES, - * respectively, both of which are rough estimates). To make this happen, we - * compute the total number of available page frames and allocate at least + * callbacks (these two numbers are given by PAGES_FOR_IO (which is a rough + * estimate) and reserverd_size divided by PAGE_SIZE (which is tunable through + * /sys/power/reserved_size, respectively). To make this happen, we compute the + * total number of available page frames and allocate at least * - * ([page frames total] + PAGES_FOR_IO + [metadata pages]) / 2 + 2 * SPARE_PAGES + * ([page frames total] + PAGES_FOR_IO + [metadata pages]) / 2 + * + 2 * DIV_ROUND_UP(reserved_size, PAGE_SIZE) * * of them, which corresponds to the maximum size of a hibernation image. * @@ -1322,7 +1336,8 @@ int hibernate_preallocate_memory(void) count -= totalreserve_pages; /* Compute the maximum number of saveable pages to leave in memory. */ - max_size = (count - (size + PAGES_FOR_IO)) / 2 - 2 * SPARE_PAGES; + max_size = (count - (size + PAGES_FOR_IO)) / 2 + - 2 * DIV_ROUND_UP(reserved_size, PAGE_SIZE); /* Compute the desired number of image pages specified by image_size. */ size = DIV_ROUND_UP(image_size, PAGE_SIZE); if (size > max_size) |