On Thu, Oct 25, 2018 at 05:09:32PM +0100, Rui Salvaterra wrote: > Hi, > > After commit 744889b7cbb56a64f957e65ade7cb65fe3f35714, I started > getting this (-EIO, it seems) on my dmesg: > > swapon: discard_swap(00000000c275f02d): -5 > > This is an 8 GB zram swap device. It's configured like this: > > modprobe zram > echo zstd > /sys/block/zram0/comp_algorithm > echo 8297508864 > /sys/block/zram0/disksize > mkswap /dev/zram0 > swapon -d -p 100 /dev/zram0 > > I should note that if I use --discard=pages instead of -d (both > policies) at swapon, I don't get this error. > Reverting the commit from v4.19 final fixes the error for me, but > surely breaks something else. :) > Let me know if you need any additional information. The patch titled with 'block: make sure discard bio is aligned with logical block size' in the list may fix this issue, please test and see if it works. Thanks, Ming
