We have had some success preventing this behaviour by adjusting a kernel
tunable. If those who are able to reproduce this could try increasing
the sysctl 'vm.min_free_kbytes' and see how that affects their tests.
We have been running with this value approximatly 10x its default value
for our testing though this is likely an excessive bump.
# sysctl vm.min_free_kbytes
vm.min_free_kbytes = 8080
# sysctl vm.min_free_kbytes=80800
#
Please report any testing back here on this bug. Thanks.
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Writing big files to NFS target causes system lock up
https://bugs.launchpad.net/bugs/561210
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