On Sat, Apr 15, 2017 at 12:17:25PM -0600, Chris Murphy wrote:
> I don't understand this:
> 
> /dev/mmcblk0p3 on / type btrfs
> (rw,noatime,seclabel,compress=zlib,nossd,ssd_spread,space_cache,commit=150,subvolid=260,subvol=/root)
> 
> The fstab uses ssd_spread. It looks like during startup the initial
> option is ssd via autodetection and then at switchroot time, when it
> goes ro to rw, the fstab options are applied and it becomes
> ssd_spread. Fine.
> 
> Then later I tried
> 
> mount -o remount,ssd
> 
> To go back to regular ssd option, but nothing happens, mount still
> shows ssd_spread.

ssd_spread implies ssd.

> And then if I do
> 
> mount -o remount,nossd
> 
> I get the above mount output with nossd,ssd_spread options which would
> seem to be a contradiction. At least it's confusing. So... now what?
> 
> kernel 4.10.8-200.fc25.x86_64

Already fixed in mainline.  You need linus/master from literally today if
your time zone is between +1 and +3 (inclusively), adjust by one day
accordingly if not.

Or cherry-pick 951e79663.

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