Re: RE24 testing (pre-testing on 2.4.27)

[Aaron Richton <richton@nbcs.rutgers.edu>]

On Mon, 7 Nov 2011, Howard Chu wrote:

> > It seems that back-mdb really expects FDSYNC and fdatasync be available 
> > on target system.  Currently FreeBSD does not have implemented these 
> > semantics (yet).
> >
> > I've made a workaround in the FreeBSD port to make it work; it would be 
> > nice to have configure script test if FDSYNC and fdatasync is available 
> > and make the corresponding workaround (FSYNC and fsync) if not so 
> > building from source would just work.
>
> You're welcome to submit appropriate patches for configure.in and any 
> affected code.

Do you envision issues with using msync() instead, across the board? I 
would think that, given that back-mdb only makes sense when 
_POSIX_MAPPED_FILES, msync would present a more portable way of getting to 
the underlying fsync()/fdatasync() calls. (Heck, on Linux, it's just a 
couple lines of error checking wrapping a vfs_fsync().)

Xin: is msync() available on FreeBSD? You're mentioning fsync as the 
proposed patch...