Re: [BK-PATCH-2.5] Introduce new VFS inode cache lookup function

[Nikita Danilov <Nikita@Namesys.COM>]

David Woodhouse writes:
 > 
 > aia21@cantab.net said:
 > > The below ChangeSet against Linus' current BK tree adds a new function
 > > to the VFS, fs/inode.c::ilookup().
 > 
 > > This is needed in NTFS when writing out inode metadata pages via the
 > > VM dirty page code paths as we need to know whether there is an active
 > > inode in icache but we don't want to do an iget() because if the inode
 > > is not active then there is no need to write it... - I can just skip
 > > onto the next one instead... - If there is an active inode then I need
 > > to get the struct inode in order to perform appropriate locking for
 > > the write out to happen. 
 > 
 > Yum. I need similar functionality for JFFS2 garbage collection. When moving
 > a data node, we currently iget() the inode to which it belongs and update
 > its in-core extent lists accordingly. If the inode in question wasn't
 > already present, there's no real need to do that.
 > 

Reiser4 also needs this.

 > --
 > dwmw2
 > 

Nikita.

 >