ChanServ changed the topic of #linux-sunxi to: Allwinner/sunxi development - Did you try looking at our wiki? https://linux-sunxi.org - Don't ask to ask. Just ask and wait for an answer! - This channel is logged at https://oftc.irclog.whitequark.org/linux-sunxi
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<swiftgeek> btw with that broken RAM i was getting negative PIDs so maybe that explains it xD
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<rm_> so I have two boards, Mele M5 and a little-known Iteaduino A20
<rm_> both even running the same DTB and u-boot for the M5, they get different RAM amounts
<rm_> [ 0.000000] Memory: 897428K/1048576K available (10240K kernel code, 1687K rwdata, 3328K rodata, 2048K init, 346K bss, 52844K reserved, 98304K cma-reserved, 262144K highmem)
<rm_> [ 0.000000] Memory: 864936K/1015868K available (10[ 0.000000] Memory: 864936K/1015868K available (10240K kernel code, 1687K rwdata, 3328K rodata, 2048K init, 346K bss, 52628K reserved, 98304K cma-reserved, 229436K highmem)240K kernel code, 1687K rwdata, 3328K rodata, 2048K init, 346K bss, 52628K reserved, 98304K cma-reserved, 229436K highmem)
<rm_> oh, a bit of a mess
<rm_> [ 0.000000] Memory: 864936K/1015868K available (10240K kernel code, 1687K rwdata, 3328K rodata, 2048K init, 346K bss, 52628K reserved, 98304K cma-reserved, 229436K highmem)
<rm_> the Iteaduino has less (1015 vs 1048)
<rm_> I wonder where's that stored, if not in DTBs or u-boot?
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<rm_> love how they show 1.9W power consumption and that's with a 500GB SATA SSD
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<smaeul> rm_: does the Iteaduino A20 happen to be plugged in to a 4K display? the difference in available memory is suspiciously close to the amount that would be reserved by U-Boot for a framebuffer
<rm_> no display on either
<rm_> I guess it could be that the mismatching DTB leads to a connected display being mistakenly detected
<smaeul> that's not likely, and even then the EDID would be unreadable, so U-Boot would use a low resolution
<smaeul> you could compare /proc/iomem between the two boards, or /sys/firmware/fdt (the DTB as patched by U-Boot, possibly with reserved memory areas added)
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<rm_> iomem:
<rm_> -40000000-7e00efff : System RAM
<rm_> +40000000-7fffffff : System RAM
<rm_> the rest is the same
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<rm_> actually, the M5 (larger RAM) might have had something in u-boot environment left over
<rm_> after zeroing the SD-card and rewriting u-boot-sunxi-with-spl.bin to there, it now has less RAM too :)
<rm_> nah, it is simpler than that (but still puzzling)
<rm_> I'm actually using different u-boot versions