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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2011-03-15 00:45:46 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-03-15 00:45:46 +0100 |
| commit | bea3864fb627d110933cfb8babe048b63c4fc76e (patch) | |
| tree | 00cbe0edef293227d1cc441eab75ad1ded992df8 /kernel/power | |
| parent | 40dc166cb5dddbd36aa4ad11c03915ea538f5a61 (diff) | |
| download | blackbird-obmc-linux-bea3864fb627d110933cfb8babe048b63c4fc76e.tar.gz blackbird-obmc-linux-bea3864fb627d110933cfb8babe048b63c4fc76e.zip | |
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 <Martin@Lichtvoll.de>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/snapshot.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index 64db648ff911..ca0aacc24874 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 |
