Re: Automatic SSD trim script

Pádraig Brady
2013-12-11T10:54:07Z

On 12/10/2013 03:44 PM, Karel Zak wrote:
> On Mon, Dec 09, 2013 at 02:43:32PM +0100, Lukáš Czerner wrote:
>>> All we need is to link fstrim with libmount and lib/sysfs.c, add a new
>>> option --all and check non-zero /sys/block/<name>/queue/discard_granularity
>>> (or so).
>>
>> Yes and yes. This is the ultimate solution. Simply being able to run
>> fstrim --all to discard free space on all the mounted supported file
>> systems is great idea. In that case we do not need any scripts at
>> all.
>
> Implemented. Sten, maybe you can try fstrim --all from git tree
> in your crontab.

Very nice:
https://git.kernel.org/cgit/utils/util-linux/util-linux.git/commit/?id=36c370c

One foible was it was called multiple times for my /home
Now my /home is mounted a couple of times on my system (why I don't know):

├─/home /dev/sdb1 ext4 rw,relatime,seclabel,user_xattr,barrier=1,data=ordered
│ └─/home /dev/sdb1 ext4 rw,relatime,seclabel,user_xattr,barrier=1,data=ordered

If this was common it might be worth avoiding processing the same entry multiple times.

thanks!
Pádraig