F15 ext4 discard option - why not default?
fedora at leemhuis.info
Wed Mar 16 18:32:03 UTC 2011
On 16.03.2011 18:55, Ric Wheeler wrote:
> On 03/16/2011 01:53 PM, Michał Piotrowski wrote:
>> I installed F15 on SSD and I noticed that file systems are not mounted
>> with discard option.
>> Shouldn't "discard" option be enabled by default for SSD devices?
> No - discard is off on purpose. Some SSD's work very well, others have
> performance issues with discard and some even became unusable bricks.
> The idea is to have it off by default so people can test. Over time, if things
> go well, we can think about changing the default.
That IOW and AFAICS means that we need a whitelist or a blacklist (or
both) in the long term anyway, as those that become bricks won't simply
vanish over night.
So why not start with that now? Or is the answer simply a lack of
resources/people interested to drive things forward?
Just curious. I have a Intel SSDSA2M080G2GC for a while now but was not
bold enough yet to give discard on Ext4 a try.
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