[Cluster-devel] [GFS2] Fix bz 224480, pass on the baton for unlinked, but open inodes

[Josef Whiter]

On Mon, Mar 12, 2007 at 12:18:33PM +0000, Steven Whitehouse wrote:
> Hi,
> 
> This is my current patch to fix bz 224480 which survives my torture test
> of setting the drop_count too low and then running postmark. It needs
> wider testing though as it makes a number of changes to the demote code.
> 
> This patch removes the memory allocation which was previously required
> in order to queue a demotion request on a glock. This was mentioned in
> bz 221152 as a future objective. Also, this then allows the use of the
> GLF_DEMOTE flag in GFS2's new ->drop_inode() routine to clear the link
> count on the inode (the callback only occurs if another node tries to
> demote the iopen glock for the inode, and this only happens in the case
> that the link count has hit zero). This ensures that inodes which are
> open, but otherwise with zero link count cannot get "lost" unless a node
> crashes (in which case we have another method of recovering the free
> space).
>

I've been running this patch while doing other testing and trying to track down
other problems and I haven't seen any issues, so ACK.

Josef