Re: [Question] Should direct reclaim time be bounded?

[Michal Hocko]

On Wed 10-07-19 11:42:40, Mike Kravetz wrote:
[...]
> As Michal suggested, I'm going to do some testing to see what impact
> dropping the __GFP_RETRY_MAYFAIL flag for these huge page allocations
> will have on the number of pages allocated.

Just to clarify. I didn't mean to drop __GFP_RETRY_MAYFAIL from the
allocation request. I meant to drop the special casing of the flag in
should_continue_reclaim. I really have hard time to argue for this
special casing TBH. The flag is meant to retry harder but that shouldn't
be reduced to a single reclaim attempt because that alone doesn't really
help much with the high order allocation. It is more about compaction to
be retried harder.
-- 
Michal Hocko
SUSE Labs