On Fri, Aug 21, 2009 at 06:08:52PM -0400, Theodore Tso wrote: > http://ext4.wiki.kernel.org/index.php/Clarifying_Direct_IO's_Semantics > > Comments are welcome, either on the wiki's talk page, or directly to > me, or to the linux-fsdevel or linux-ext4. In the section on perhaps not waiting for buffered fallback, we need to clarify that O_DIRECT reads need to know to look in the pagecache. That is, if we decide that extending O_DIRECT writes without fsync can return before the data hits the storage, the caller shouldn't also have to call fsync() just to call read() of data they just wrote! Joel -- To spot the expert, pick the one who predicts the job will take the longest and cost the most. Joel Becker Principal Software Developer Oracle E-mail: joel.becker@xxxxxxxxxx Phone: (650) 506-8127 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
