Re: NAND flash question

Charles Tilbury
2005-06-28T18:57:44Z

On Tuesday 28 June 2005 11:30 am, David Woodhouse wrote:
> On Tue, 2005-06-28 at 09:41 -0700, Charles Tilbury wrote:
> > In part, I want to get rid of the messages. They make the marketing
> > guys nervous. <<grin>> I may just supress them using comments. What
> > I really need is to make sure that the user land data gets flushed to
> > NAND before power loss. That seems like a JFFS2 issue, do you agree?
>
> Not really. Userland data are flushed to the medium on fsync() or sync()
> just as with other file systems. If a write() call has _just finished
> when the power is lost, there's no guarantee that _any_ file system will
> have committed that write to the medium already. (Unless you were using
> O_SYNC, which we don't support for JFFS2).

How could one change the flush interval to around 100mS? Or does that sound
like a stupid idea?