jffs2: too few erase blocks

Jörn Engel joern at logfs.org
Mon Oct 29 17:54:58 EDT 2007

On Mon, 29 October 2007 20:51:25 +0000, Jamie Lokier wrote:
> When you say "sync", do fdatasync() / fsync() on open files and
> directories flush the necessary blocks from wbuf for those
> files/directories data and their inode metadata, for JFFS2?
> I have been calling sync(), but I wonder if fdatasync/fsync do as they
> are supposed to?
> (If you know about other fses like LogFS/Yaffs/UBIFS that would be
> handy, too).

fsync/fdatasync should work on logfs.  If you know a good way to test
this, I'd add it to my suite of regression tests.  Right now I have to
rely on reading the code.

> Probably all are unnecessary in my specific application, as I use a
> JFFS2 with cfi_cmdset_0002, which I get the impression doesn't buffer
> any writes anyway.  But I like to get the application code right, in
> case I change to another device.

Any filesystem should follow the standards here.  Anything else is a


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