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Date: Mon, 12 Apr 2010 10:06:17 -0700
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	Mon, 12 Apr 2010 10:06:20 -0700 (PDT)
Subject: Re: isp driver - sysctl controls missing
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On 04/12/2010 10:03 AM, Ross wrote:
> It looks like in the isp(4) driver update that happened back when Freebsd
> v8.0 got updated, it looks like the user-modifiable sysctls got
> removed and timeouts are now hardcoded.
>
> The man page for isp state:
> -=
> SYSCTL OPTIONS
>       dev.isp.N.loop_down_limit
>               This value says how long to wait in seconds after loop has gone
>               down before giving up and expiring all of the devices that were
>               visible.  The default is 300 seconds (5 minutes).  A seperate
>               (nonadjustable) timeout is used when booting to not stop booting
>               on lack of FC connectivity.
>
>       dev.isp.N.gone_device_time
>               This value says how long to wait for devices to reappear if they
>               (temporarily) disappear due to loop or fabric events.  While this
>               timeout is running, I/O to those devices will simply be held.
>
> -=
>
> But checking over the driver code shows sysctl details are now removed
> and the hardcoded value for loop_down_limit is now 60 seconds and
> gone_device_time is 30 seconds.
>
> Anyone know if there's any reason for the sysctl is being pulled out,
> and the limits being so high?  We use this in conjunction with geom
> multipath, so would prefer to fail over to another fc path asap when
> there's an issue.
>
>
> Cheers,
>    Ross.
>
>    
Sounds like a bug that I need to fix.