2011/11/6 Barry Song <21cnbao@xxxxxxxxx>: > 2011/11/6 Pavel Machek <pavel@xxxxxx>: >> Hi! >> >>> From: Barry Song <Baohua.Song@xxxxxxx> >>> >>> Current swsusp requires swap partitions even larger than real saved pages >>> due to the worst compress ratio: >>> but for an embedded system, which has limited storage space, then it might >>> can't give the big size partition to save snapshot. >>> In the another way, some embedded systems can definitely know the most size >>> needed for snapshot since they run some specific application lists. >>> So this patch provides the possibility for bootloader to tell kernel even >>> the system has a little snapshot partition, but it is still enough. >>> For example, if the system need to save 120MB memory, origin swsusp will require >>> a 130MB partition to save snapshot. but if users know 30MB is enough for them( >>> compressed image will be less than 30MB), they just make a 30MB >>> partition. >> >> Would it be better to have /sys/power/... entry which would allow >> configuring expected compression ratio at runtime? > > i think it is better to have a sys node than add another kernel param. > but the point is i only care about the final image size but not > compression ratio. i don't care how well lzo will do for me since i > only have limited disk space and know how many pages want to be saved. > there has been a image_size node, will we have a expected_image_size node? or will we have just a node named /sys/power/check_size, if 1(default), check, otherwise(0 set by users), skip checking? >> Pavel -barry _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/linux-pm
