Once upon a time, Petr Pisar <ppi...@redhat.com> said:
> On 2018-07-11, Zbigniew Jędrzejewski-Szmek <zbys...@in.waw.pl> wrote:
> > The effects of fsync are impossible to see unless you hard-reboot the
> > machine.
> Are you sure non-fsynced changes are are guaranteed to be visible on
> block cache level? E.g. if you mix read/write and mmaped I/O from
> different processes?

fsync() has nothing to do with that - it is purely a request to push the
buffer to disk.  There is nothing defined about fsync() that would
affect inter-process I/O.


Chris Adams <li...@cmadams.net>
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