On Fri, Sep 04, 2015 at 04:25:27PM -0600, Andreas Dilger wrote:
> This is a bit of a surprising result, since in my testing in the
> past, copy_{to/from}_user() is a major consumer of CPU time (50%
> of a CPU core at 1GB/s). What backing filesystem did you test on?
While we are at it, was cp(1) using read(2)/write(2) loop or was it using
something else (sendfile(2), for example)?
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