Re: ext3 weirdness

[Andreas Dilger]

On Apr 11, 2003  15:40 -0700, Andrew Morton wrote:
> Andreas Dilger <[e-mail]> wrote:
> > Because you can't reallocate in-use blocks until the dirty bitmaps have
> > been committed to disk in a transaction.
> 
> Also, in 2.5 pdflush will take a ref on the inode while writing it out.  So
> an unlink while pdflush is writing back the inode's pages will be magically
> instantaneous, and pdflush actually does the truncate.

It should be possible to have pdflush check for i_nlink == 0 and i_count == 1
periodically, indicating it is the only one that has a reference and then
immediately iput the node (truncating the pages instead of writing them out).

Cheers, Andreas
--
Andreas Dilger
http://sourceforge.net/projects/ext2resize/
http://www-mddsp.enel.ucalgary.ca/People/adilger/