On 04/16/12 06:31, Richard Yao wrote:
> Dear Linus Torvalds et al,
> 
> I am having some trouble with an out of tree module for a virtual block
> device driver. I need to disable the direct reclaim path when the device
> is used as swap. I cannot see a way to detect that the device is being
> used as swap, so I am currently disabling it unconditionally.
> 
> Is there a clean way to detect that the block device is being used as
> swap? I am not subscribed to the list, so please CC replies to me.
> 
> Yours truly,
> Richard Yao
> 

Please disregard my previous email. I just discovered a deadlock that
can occur if this were done.