On a ppc64le host, running postgres (tried with 9.4 to 9.6) gives the following
warning when trying to flush data to disks (which happens very frequently):
WARNING: could not flush dirty data: Operation not permitted.
A quick dig in postgres source code indicate it uses sync_file_range(2) to
flush data; which on ppe64le and arm64 is translated to sync_file_range2(2)
for alignements reasons.
The profile did not allow sync_file_range2(2), making postgres sad because
it can not flush its buffers. arm_sync_file_range(2) is an ancient alias to
sync_file_range2(2), the syscall was renamed in Linux 2.6.22 when the same
syscall was added for PowerPC.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
5862285fac