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? > Pavel > > -- Thanks barry _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/linux-pm
