Re: [PATCH] Btrfs: Do not use data_alloc_cluster in ssd mode

["Austin S. Hemmelgarn" <ahferroin7@gmail.com>]

On 2017-07-24 14:53, Chris Mason wrote:
> On 07/24/2017 02:41 PM, David Sterba wrote:
>>
>> would it be ok for you to keep ssd_working as before?
>>
>> I'd really like to get this patch merged soon because "do not use ssd
>> mode for ssd" has started to be the recommended workaround. Once this
>> sticks, we won't need to have any ssd mode anymore ...
> 
> Works for me.  I do want to make sure that commits in this area include 
> the workload they were targeting, how they were measured and what 
> impacts they had.  That way when we go back to try and change this again 
> we'll understand what profiles we want to preserve.
Just thinking long term here, but might it make sense to (eventually) 
allow the user to tune how big a chunk of space to look for?  I know 
that ext* have options to do this kind of thing, and I think XFS does 
too (but they do it at filesystem creation time), and I do know people 
who make use of those to make sure things are working at their absolute 
best.