TRIM and changing mount options

[aurfalien]

On Jul 25, 2013, at 9:15 PM, Trond Endrestøl wrote:

> On Thu, 25 Jul 2013 19:25-0700, aurfalien wrote:
> 
>> 
>> On Jul 24, 2013, at 12:51 PM, Alexandre Labarre wrote:
>> 
>>> Le mercredi 24 juillet 2013, aurfalien a écrit :
>>> 
>>> On Jul 24, 2013, at 9:01 AM, Dan Nelson wrote:
>>> 
>>>> In the last episode (Jul 23), aurfalien said:
>>>>> On Jul 23, 2013, at 7:55 PM, Dan Nelson wrote:
>>>>>> In the last episode (Jul 23), aurfalien said:
>>>>>>> At any rate, could some one;
>>>>>>> 
>>>>>>> a) Explain how I am loading my file system as I'm used to fstab?
>>>>>>> b) How to run tunefs on my zroot
>>>>>>> c) How to determine if I actually have the needed TRIM support in my
>>>>>>> kernel
>>>>> 
>>>>>> I'm not sure if there's a way to query TRIM status on arbitrary geom
>>>>>> providers, but you can see whether zfs successfully sent any TRIM
>>>>>> requests by watching the output of "sysctl kstat.zfs.misc.zio_trim".  If
>>>>>> .zio_trim.success increments and .unsupported (or .failed) doesn't, then
>>>>>> you know that it's working.
>>>>> 
>>>>> Looks like I don't have it.
>>>>> 
>>>>> I keep reading that I must download the patch and make it which is not an
>>>>> issue.
>>>>> 
>>>>> But I can't seem to find it.
>>>>> 
>>>>> I've dl'd the 9.2 beta in hopes to check its src and see if its there.
>>>>> 
>>>>> Looks like all I really need is the current rel.
>>>> 
>>>> ZFS TRIM support was MFC'd into the 9 branch in June, so it wasn't in 9.1
>>>> but will be available in 9.2:
>>>> 
>>>> http://svnweb.freebsd.org/base?view=revision&revision=251419
>>> 
>>> 
>>> I actually got the 9.2 src and found what i was looking for  so many thanks.
>>> 
>>> Gonna figure out what step are required to compile this in to my current 9.1 rel.
>>> 
>>> Thanks again.
>>> 
>>> - aurf
>>> Hi,
>>> Why you do not track 9/Stable or wait 9.2-Release?
>>> We are at the first Beta stage of 9.2. (9.2-Beta 1). You cannot use "freebsd-update" to upgrade your 9.1-Release to 9.2-Beta 1 because there was a problem, but this will be resolved for 9.2-Beta 2 in the next days or weeks.
>>> Just my .2 cents
>>> 
>>> Kind regards,
>>> Alexandre
>> 
>> Hi,
>> 
>> Whats the best list to submit oddities regarding freeBSD 9.2 Beta 1?
>> 
>> Specifically, this line in 9.1 creates and mounts the fs under /mnt;
>> 
>> zpool create -o altroot=/mnt -o cachefile=/var/tmp/zpool.cache zroot mirror /dev/gpt/disk0 /dev/gpt/disk1
>> 
>> But in 9.2 beta 1, its under /mnt/zroot.
>> 
>> Just seems a bit odd is all.
>> 
>> - aurf
> 
> What does zfs get mountpoint zroot tell you in each case?

Hi again,

Specifying the command as follows forces same behavior as 9.1 so all is well with a slight mod;

zpool create -o altroot=/ -o cachefile=/var/tmp/zpool.cache zroot mirror /dev/gpt/disk0 /dev/gpt/disk1

The change is colored in red.  It was /mnt.

- aurf