Chris Wedgwood <[email protected]> writes:
> If caching is enabled I still lose data. Linux does have a concept of
> write barriers but these are presently not implemented for XFS right
> now.
I implemented them some time ago for log writes in XFS. Not for fsync though,
although fsync usually does a log write afterwards so it should work
in practice too. fdatasync might not.
Don't know if the code hasn't bit rotted away and it also was a bit
dumb. It was definitely there at some point.
But then a lot of ATA disks and SCSI don't support barriers. Or at least
the IDE barrier tests fails on several of my machines.
-Andi
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