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79e70568d7
In a recent discussion with the XFS developers, Dave Chinner recommended us *not* to use discard, but rather issue fstrims explicitly. In machines like Amazon's c3-class, the situation is made worse by the fact that discard is not supported by the disk. Contrary to my intuition, adding the discard mount option in such situation is *not* a nop and will just create load for no reason. Signed-off-by: Glauber Costa <glommer@scylladb.com>