Re: What happened to the sb writeback list (aka sync efficiency) fix?

["Holger Hoffstätte" <holger@applied-asynchrony.com>]

On 06/20/16 18:43, Brian Foster wrote:
> On Mon, Jun 20, 2016 at 01:46:38PM +0000, Holger Hoffstätte wrote:
>>
>> Once upon a time there was this fine patch set called
>> "improve sync efficiency with sb inode wb list" [1]
>> by Brian Foster, who fixed up the original version by Josef Bacik.
>>
>> I've been running with this since then and it seems to work flawlessly,
>> yet it doesn't seem that this ever got merged..does anybody know why?
>>
>> Waiman Long has been working on something similar with his per-CPU
>> lists, but those patches naturally collide a bit, so I'm wondering
>> what's what.
>>
>> Fwiw the effect of the wb list on systems with many cached inodes is
>> phenomal; it would be a shame if this went unmerged.
>>
> 
> FWIW, the latest version posted was v7:
> 
> http://thread.gmane.org/gmane.linux.file-systems/104078

Ah yes..that was a comment update so I didn't merge it.

> Thanks for the testing feedback. Unfortunately, I've not really heard
> any feedback on getting this merged. I'm not sure the previous
> version(s) by Josef and Dave got much traction either. :(

The early versions by Josef had a lockdep issue, which your version
apparently fixed. I've not had a single problem with it..but that
admittedly doesn't mean anything. At some point I tried merging it
with the per-CPU list patches (for fun :) but that turned out a bit
too hairy for me.

cheers,
Holger