[dm-devel] [RFC PATCH v2] dm mpath: add a queue_if_no_path timeout

[Frank Mayhar]

On Fri, 2013-11-01 at 04:17 +0000, Junichi Nomura wrote:
> I slightly modified the patch:
>   - fixed the timeout handler to correctly find
>     clone request and "struct multipath"
>   - the timeout handler just disables "queue_if_no_path"
>     instead of killing the request directly
>   - "dmsetup status" to show the parameter
>   - changed an interface between dm core and target
>   - added some debugging printk (you can remove them)
> and checked the timeout occurs, at least.
> 
> I'm not sure if this feature is good or not though.
> (The timer behavior is not intuitive, I think)
> 
> ---
> Jun'ichi Nomura, NEC Corporation
> 
[patch trimmed]

Thanks!  I integrated your new patch and tested it.  Sure enough, it
seems to work.  I've made a few tweaks (added a module tunable and
support for setting the timer in multipath_message(), removed your debug
printks) and will submit the modified patch for discussion shortly.
-- 
Frank Mayhar
310-460-4042