Re: Can O_SYNC be implemented by using fsync?

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Pavel Machek <pavel@suse.cz> writes:
> >
> > It is just very very inefficient to do it this way, especially on file systems
> > that don't use page sized blocks. Fsync does a lot of work while
> > searching
>
> Well, maybe O_SYNC is so rare that slowdown might be acceptable.

O_SYNC is used in user space journaling (e.g. in databases). That
may be rare, but is definitely performance critical :-)

-Andi

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