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authorRafael J. Wysocki <rjw@sisk.pl>2011-03-15 00:45:46 +0100
committerRafael J. Wysocki <rjw@sisk.pl>2011-03-15 00:45:46 +0100
commitbea3864fb627d110933cfb8babe048b63c4fc76e (patch)
tree00cbe0edef293227d1cc441eab75ad1ded992df8 /kernel/power
parent40dc166cb5dddbd36aa4ad11c03915ea538f5a61 (diff)
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.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index 64db648ff91..ca0aacc2487 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