Re: ext3-2.4-0.9.4

[Alan Cox]

> Chris Mason <[e-mail]> writes:
> 
> > Correct, in the current 2.4.x code, its a quirk.  fsync(any object) ==
> > fsync(all pending metadata, including renames).
> 
> This does not help.  The MTAs are doing fsync() on the temporary file
> and then using the *subsequent* rename() as the committing operation.

Which is quaint, because as we've pointed out repeatedly to you rename
is not an atomic operation. Even on a simple BSD or ext2 style fs it can
be two directory block writes,  metadata block writes, a bitmap write
and a cylinder group write.

> It would be nice to have an option (on either the directory or the
> mountpoint) to cause all metadata updates to commit to the journal
> without causing all operations to be fully synchronous.  This would

You mean fsync() on the directory. 

Alan