On Feb 24, 2009 00:05 -0500, Theodore Ts'o wrote: > When closing a file that had been previously truncated, force any > delay allocated blocks that to be allocated so that if the filesystem > is mounted with data=ordered, the data blocks will be pushed out to > disk along with the journal commit. Many application programs expect > this, so we do this to avoid zero length files if the system crashes > unexpectedly. Should this only be done with "truncate-to-zero" operations, or any truncate? Some applications may do extending truncates in order to trigger file preallocation ala Windows, and we don't necessarily want to punish all of the IO for those files. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
