TRIM and changing mount options

[aurfalien]

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