New Linux xfs/reiser file systems

I was talking to a Linux user yesterday, and he said that performance
using the xfs file system is pretty bad.  He believes it has to do with
the fact that fsync() on log-based file systems requires more writes.

With a standard BSD/ext2 file system, WAL writes can stay on the same
cylinder to perform fsync.  Is that true of log-based file systems?

I know xfs and reiser are both log based.  Do we need to be concerned
about PostgreSQL performance on these file systems?  I use BSD FFS with
soft updates here, so it doesn't affect me.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
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