Hi, On Wed, 2005-02-09 at 18:38, Badari Pulavarty wrote:
> I was under the impression that writepage() could also be used to > flush the data even for write(2) writes. Is it not true ? That _can_ happen, certainly. But it's not the default path. There's nothing that stops a deferred writeback from write(2) from subsequently getting flushed by a writepage(), if the VM decides that it needs to push that page to disk before the writeback background flush has happened. > I was trying to add writepages() interface for ext3. I am wondering > if I need to do journaling for that case too. Yes. If you implement writepages(), then msync() will ultimately use that for flushing file regions; and as that represents mmap()ed data, it could easily cover holes in the file, and allocation may be necessary. Cheers, Stephen - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
