Hi, right now I own this SSD :
Intel SSD 520 Series MLC 120 Gigs
I'm using the latest firmware from Intel.
Also, this is my /etc/fstab
/dev/sda3 /boot ext2 noauto,noatime,defaults
1 2
/dev/sda1 /boot/efi vfat noauto,defaults
0 0
/dev/sda4 / btrfs
defaults,noatime,ssd,discard,compress=lzo,subvol=@racine 0 1
tmpfs /var/tmp/portage tmpfs size=12G
0 0
none /dev/shm tmpfs nodev,nosuid,noexec
0 0
I discovered that when it hangs, it can be small or big files.
My latest hang was when I removed the vanilla-sources-3.6.8 last night.
I don't see any errors inside dmesg or /var/log/messages.
Sylvain
2012/12/6 Marc MERLIN <marc@xxxxxxxxxxx>:
> On Wed, Dec 05, 2012 at 11:56:27PM -0500, Sylvain Alain wrote:
>> Hi everyone, I'm running btrfs since octobre 2012 and I would like to
>> understand 2 behavior that I noticed.
>>
>> 1. When I delete a big directory, sometimes it can hang my box for 1
>> minutes or so, it seems that's the btrfs lock my SSD.
>
> Doesn't directly answer your question, but if you don't have discard as a
> mount option, you should try that.
>
> Which SSD do you have? Do normal big file writes succeed or hang too?
>
> My guess right now is that you don't have discard, and your drive is doing
> very slow garbage collection. I had a Crucial C300 that did just that before
> it ate itself and my data a month later.
> Also check that your drive does not have a firmware update to remove those
> hangs.
>
> Marc
> --
> "A mouse is a device used to point at the xterm you want to type in" - A.S.R.
> Microsoft is to operating systems ....
> .... what McDonalds is to gourmet cooking
> Home page: http://marc.merlins.org/
--
Salut
alp
Sylvain
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