Re: [patch] mm, thp: add new background defrag option

[Vlastimil Babka]

On 01/09/2017 11:04 AM, Vlastimil Babka wrote:
> On 01/06/2017 11:20 PM, David Rientjes wrote:
>> I'd leave it to Andrew to decide whether sysfs files should accept 
>> multiple modes or not.  If you are to propose a patch to do so, I'd 
>> encourage you to do the same cleanup of triple_flag_store() that I did and 
>> make the gfp mask construction more straight-forward.  If you'd like to 
>> suggest a different name for "background", I'd be happy to change that if 
>> it's more descriptive.
> 
> Suggestion is above. I however think your cleanup isn't really needed,
> we can simply keep the existing 3 internal flags, and "madvise+defer"
> would enable two of them, like in my patch. Nothing says that internally
> each option should correspond to exactly one flag.

Forgot to add that if/when you repost this, please CC linux-api and
summarize what else was considered in the changelog. Thanks.