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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>
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1 changed files with 4 additions and 4 deletions
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@ -42,15 +42,15 @@ static void swsusp_unset_page_forbidden(struct page *);
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/*
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/*
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* Preferred image size in bytes (tunable via /sys/power/image_size).
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* Preferred image size in bytes (tunable via /sys/power/image_size).
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* When it is set to N, swsusp will do its best to ensure the image
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* When it is set to N, the image creating code will do its best to
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* size will not exceed N bytes, but if that is impossible, it will
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* ensure the image size will not exceed N bytes, but if that is
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* try to create the smallest image possible.
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* impossible, it will try to create the smallest image possible.
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*/
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*/
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unsigned long image_size;
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unsigned long image_size;
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void __init hibernate_image_size_init(void)
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void __init hibernate_image_size_init(void)
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{
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{
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image_size = ((totalram_pages * 2) / 5) * PAGE_SIZE;
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image_size = (totalram_pages / 3) * PAGE_SIZE;
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}
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}
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/* List of PBEs needed for restoring the pages that were allocated before
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/* List of PBEs needed for restoring the pages that were allocated before
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