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root 6206 1 1 10:49 ? 00:00:00 /bin/sh -c i=0; while true; do echo $i >> /foo; i=$(expr $i + 1); sleep 3; done
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== OverlayFS ==
 
The OverlayFS filesystem was merged into the upstream Linux kernel 3.18 and is now Docker's preferred filesystem (instead of AUFS). For successful C/R, however, you need to apply the following kernel patch:
 
OverlayFS patch [https://lkml.org/lkml/2015/3/20/372]
 
== Async IO (AIO) ==
 
If you are using a kernel older than 3.19 and your container uses AIO, you need the following AIO kernel patches from 3.19:
 
==== <code>Al Viro's bd9b51e7</code> ====
 
==== <code>Pavel Emelyanov's e4a0d3e72</code> ====
[[Category:HOWTO]]
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