On Thu, Nov 3, 2016 at 11:17 PM, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > On Thu, 3 Nov 2016 22:24:07 +0100 Vitaly Wool <vitalywool@xxxxxxxxx> wrote: > >> On Thu, Nov 3, 2016 at 10:14 PM, Andrew Morton >> <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: >> > On Thu, 3 Nov 2016 22:00:58 +0100 Vitaly Wool <vitalywool@xxxxxxxxx> wrote: >> > >> >> This patch converts pages_nr per-pool counter to atomic64_t. >> > >> > Which is slower. >> > >> > Presumably there is a reason for making this change. This reason >> > should be described in the changelog. >> >> The reason [which I thought was somewhat obvious :) ] is that there >> won't be a need to take a per-pool lock to read or modify that >> counter. > > But the patch didn't change the locking. And as far as I can tell, > neither does "z3fold: extend compaction function". Right. I'll come up with the locking rework shortly, but it will be a RFC so I wanted to send it separately. ~vitaly -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>