realiably reproducible system freeze

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Hi all, I have a machine running 4.1.0-2-amd64 Debian (Stretch) and it
reliably freezes every time bcacke dirty data reaches the
writeback_percent limit (10%).

root@/sys/block/bcache0/bcache# cat writeback_percent 
10
/sys/block/bcache0/bcache# cat dirty_data 
4.7G
/sys/block/bcache0/bcache# cat writeback_percent 
10
/sys/block/bcache0/bcache# cat writeback_rate
512

The cache device is a Supertalent 64 GB SATA SSD. I had no problem with
this particular model in various configurations.

Any hints?

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Emmanuel Florac     |   Direction technique
                    |   Intellique
                    |	<eflorac@xxxxxxxxxxxxxx>
                    |   +33 1 78 94 84 02
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