Re: [PATCH v5 0/5] mm/hugetlb: Early cow on fork, and a few cleanups

From: Jason Gunthorpe
Date: Tue Mar 02 2021 - 02:47:28 EST


On Mon, Mar 01, 2021 at 04:28:46PM -0800, Andrew Morton wrote:
> On Mon, 1 Mar 2021 09:11:51 -0500 Peter Xu <peterx@xxxxxxxxxx> wrote:
>
> > On Wed, Feb 17, 2021 at 06:35:42PM -0500, Peter Xu wrote:
> > > v5:
> > > - patch 4: change "int cow" into "bool cow"
> > > - collect r-bs for Jason
> >
> > Andrew,
> >
> > I just noticed 5.12-rc1 has released; is this series still possible to make it
> > for 5.12, or needs to wait for 5.13?
> >
>
> It has taken a while to settle down. What is the case for
> fast-tracking it into 5.12?

IIRC hugetlb users and fork and DMA will get the unexpected VA
corruption that triggered all this work.

Jason