Re: [PATCH v6 0/4] Enable >0 order folio memory compaction

[Andrew Morton]

On Tue, 20 Feb 2024 11:00:39 +0800 Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx> wrote:

> > The patch was based on top of my early version of this patchset, thus
> > uses "cc->nr_migratepages -= 1 << order;" and
> > "cc->nr_migratepages += 1 << order;", but now it is applied before
> > mine. The change should be "cc->nr_migratepages--;" and
> > "cc->nr_migratepages++;", respectively.
> > 
> >>
> >>> on nr_migratepages was based on this one, a better fixup
> >>> for it might be below. Since before my patchset, compaction only deals with
> >>> order-0 pages.
> >>
> >> I don't understand what this means.  The patchset you sent applies OK
> >> to mm-unstable so what else is there to do?
> > 
> > Your above fixup to Baolin's patch needs to be changed to the patch below
> > and my "mm/compaction: add support for >0 order folio memory compaction" will
> > need to be adjusted accordingly to be applied on top.
> > 
> > Let me know if anything is unclear.
> 
> Hi Andrew,
> 
> To avoid conflicts, you can drop these two patches, and I will send a 
> new version with fixing the issue pointed by Vlastimilb on top of 
> "mm/compaction: add support for >0 order folio memory compaction".
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?h=mm-everything-2024-02-16-01-35&id=97f749c7c82f677f89bbf4f10de7816ce9b071fe
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?h=mm-everything-2024-02-16-01-35&id=ea87b0558293a5ad597bea606fe261f7b2650cda

Well I thought I'd fixed everything up 10 minutes ago.  Please take a
look at next mm-unstable.