Hello,
I have experienced hangs with above kernel and bcache in writeback mode.
Hangs are very easily archieved - just do:
mkdir /data/tmp
cp -xar / /data/tmp
Cancel after 1-5 minutes, then do sync (sometimes don't needed) and it
hangs. Either the sync hangs and/or the cp (or rm /data/tmp). Behaviour
is very consistent, it happens every time I enable writeback and perform
IO heavy operations.
I have not experienced the issue so far with writethrough mode.
Hardware is HP j000ec, attaching dmesg from hanged box with both 3.11.5
and 3.10.17 LTS kernel. Distribution is arch linux.
dmesg outputs is available on
http://www.devsoft.cz/upload/bcache_bugreport.tar.gz
P.
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