| View previous topic :: View next topic |
| Author |
Message |
JanErik
Guru
Joined: 28 Oct 2002
Posts: 488
Location: Finland
|
 Posted: Mon Jan 24, 2011 6:59 am Post subject: Swap on SSD, TRIM |
 |
|
I just ordered an SSD and will put my / and /home on it.
Now I am wondering what to do with the swap, I am not worried about the drive wear, it will be a museum piece anyway before it wears out, but the TRIM functionality and performance impact.
If I put the swap as a partition, that will not be able to use TRIM, right? If I understand correctly, it would have to be made as a swap file on the ext4 partition, then it would utilize the TRIM - but is it only if the swap file is deleted? How about when a file is constantly changed? |
|
| Back to top |
|
 |
s4e8
Guru
Joined: 29 Jul 2006
Posts: 311
|
| Posted: Mon Jan 24, 2011 7:16 am Post subject: |
|
|
| The first TRIM support in kernel is swap partition. The Adding swap dmesg will show flag "SS" if swap partition in SSD w/o TRIM, show "SSD" if w/ TRIM. |
|
| Back to top |
|
|
JanErik
Guru
Joined: 28 Oct 2002
Posts: 488
Location: Finland
|
| Posted: Mon Jan 24, 2011 10:27 am Post subject: |
|
|
| Is this also supported if the swap is encrypted with dm-crypt? |
|
| Back to top |
|
|
alextz
n00b
Joined: 04 Jan 2006
Posts: 62
Location: Romania
|
| Posted: Sun Jun 12, 2011 10:42 am Post subject: |
|
|
Is there a flag which I should pass in /etc/fstab to enable TRIM on swap.
I have a swap partition on an SSD with TRIM but it shows SS. |
|
| Back to top |
|
|
Moonboots
Apprentice
Joined: 02 Dec 2006
Posts: 164
|
| Posted: Mon Jun 13, 2011 5:31 am Post subject: |
|
|
| Add "discard" to your swap entry in fstab |
|
| Back to top |
|
|
|
Kernel & Hardware
