set kern.cam.scsi_delay to 2000ms on all platforms

Scott Long scottl at samsco.org
Thu Oct 21 13:19:13 UTC 2010


Ok, I've gotta be a stick in the mud and ask you how you've come to the conclusion that 2000 is better than 5000.  Can you provide your evidence and/or testing results?

Scott

On Oct 21, 2010, at 12:21 AM, Alexander Best wrote:

> a few years ago kern.cam.scsi_delay was set from 150000 to 5000. nowadays a
> value of 2000 should be sufficient even on old/slow hardware.
> 
> to have cleaner code it's better to set default value to 2000 instead of doing
> so in every config file on every platform.
> 
> cheers.
> alex
> 
> On Wed Oct 20 10, Scott Long wrote:
>> You've described the "what" but not the "why".  Why do you want to remove this option?  Why do you want to change its value?
>> 
>> Scott
>> 
>> On Oct 19, 2010, at 4:11 PM, Alexander Best wrote:
>> 
>>> hi there,
>>> 
>>> i've posted this patch on freebsd-hackers@, but jhb@ recommended i should also
>>> send it to freebsd-scsi at . basically what this patch does is to populate
>>> kern.cam.scsi_delay=2000 as the default value throughout the entire source
>>> tree. in addition to that it gets rid of some legacy Makefile entries, where
>>> kern.cam.scsi_delay was set to 150000.
>>> 
>>> cheers.
>>> alex
>>> 
>>> -- 
>>> a13x
>>> <SCSI_DELAY.diff2>_______________________________________________
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> 
> -- 
> a13x



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