From: Rafael J. Wysocki Date: Mon, 14 Mar 2011 23:45:46 +0000 (+0100) Subject: PM / Hibernate: Reduce autotuned default image size X-Git-Tag: upstream/snapshot3+hdmi~11231^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bea3864fb627d110933cfb8babe048b63c4fc76e;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git PM / Hibernate: Reduce autotuned default image size The hibernate image size autotuning mechanism sets the default image size to 5/2 of the total system RAM, but it is reported that on some systems device drivers allocate substantial amounts of memory during suspend and the creation of the image fails as a result (too little memory is preallocated). Modify the autotuning mechanism to use 1/3 instead of 2/5 of RAM as the default image size, which is reported to be sufficient for the affected systems. References: https://bugzilla.kernel.org/show_bug.cgi?id=30482 Reported-and-tested-by: Martin Steigerwald Signed-off-by: Rafael J. Wysocki --- diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index 64db648..ca0aacc 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -42,15 +42,15 @@ static void swsusp_unset_page_forbidden(struct page *); /* * Preferred image size in bytes (tunable via /sys/power/image_size). - * 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. + * 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. */ unsigned long image_size; void __init hibernate_image_size_init(void) { - image_size = ((totalram_pages * 2) / 5) * PAGE_SIZE; + image_size = (totalram_pages / 3) * PAGE_SIZE; } /* List of PBEs needed for restoring the pages that were allocated before