Re: [PATCH RFC 00/30] userfaultfd-wp: Support shmem and hugetlbfs

2021-02-09 Thread Mike Kravetz
On 2/5/21 6:36 PM, Peter Xu wrote: > On Fri, Feb 05, 2021 at 01:53:34PM -0800, Mike Kravetz wrote: >> On 1/29/21 2:49 PM, Peter Xu wrote: >>> On Fri, Jan 15, 2021 at 12:08:37PM -0500, Peter Xu wrote: This is a RFC series to support userfaultfd upon shmem and hugetlbfs. >> ... >>> Huge & Mike,

Re: [PATCH RFC 00/30] userfaultfd-wp: Support shmem and hugetlbfs

2021-02-09 Thread Peter Xu
On Tue, Feb 09, 2021 at 11:29:56AM -0800, Mike Kravetz wrote: > On 2/5/21 6:36 PM, Peter Xu wrote: > > On Fri, Feb 05, 2021 at 01:53:34PM -0800, Mike Kravetz wrote: > >> On 1/29/21 2:49 PM, Peter Xu wrote: > >>> On Fri, Jan 15, 2021 at 12:08:37PM -0500, Peter Xu wrote: > This is a RFC series t

Re: [PATCH RFC 00/30] userfaultfd-wp: Support shmem and hugetlbfs

2021-02-05 Thread Peter Xu
On Fri, Feb 05, 2021 at 02:21:47PM -0800, Hugh Dickins wrote: > On Fri, 29 Jan 2021, Peter Xu wrote: > > > > Huge & Mike, > > > > Would any of you have comment/concerns on the high-level design of this > > series? > > > > It would be great to know it, especially major objection, before move on

Re: [PATCH RFC 00/30] userfaultfd-wp: Support shmem and hugetlbfs

2021-02-05 Thread Hugh Dickins
On Fri, 29 Jan 2021, Peter Xu wrote: > > Huge & Mike, > > Would any of you have comment/concerns on the high-level design of this > series? > > It would be great to know it, especially major objection, before move on to an > non-rfc version. Seeing Mike's update prompts me to speak up: I have

Re: [PATCH RFC 00/30] userfaultfd-wp: Support shmem and hugetlbfs

2021-02-05 Thread Peter Xu
On Fri, Feb 05, 2021 at 01:53:34PM -0800, Mike Kravetz wrote: > On 1/29/21 2:49 PM, Peter Xu wrote: > > On Fri, Jan 15, 2021 at 12:08:37PM -0500, Peter Xu wrote: > >> This is a RFC series to support userfaultfd upon shmem and hugetlbfs. > ... > > Huge & Mike, > > > > Would any of you have comment/

Re: [PATCH RFC 00/30] userfaultfd-wp: Support shmem and hugetlbfs

2021-02-05 Thread Mike Kravetz
On 1/29/21 2:49 PM, Peter Xu wrote: > On Fri, Jan 15, 2021 at 12:08:37PM -0500, Peter Xu wrote: >> This is a RFC series to support userfaultfd upon shmem and hugetlbfs. ... > Huge & Mike, > > Would any of you have comment/concerns on the high-level design of this > series? > > It would be great

Re: [PATCH RFC 00/30] userfaultfd-wp: Support shmem and hugetlbfs

2021-01-29 Thread Peter Xu
On Fri, Jan 15, 2021 at 12:08:37PM -0500, Peter Xu wrote: > This is a RFC series to support userfaultfd upon shmem and hugetlbfs. > > PS. Note that there's a known issue [0] with tlb against uffd-wp/soft-dirty in > general and Nadav is working on it. It may or may not directly affect > shmem/huge

[PATCH RFC 00/30] userfaultfd-wp: Support shmem and hugetlbfs

2021-01-15 Thread Peter Xu
This is a RFC series to support userfaultfd upon shmem and hugetlbfs. PS. Note that there's a known issue [0] with tlb against uffd-wp/soft-dirty in general and Nadav is working on it. It may or may not directly affect shmem/hugetlbfs since there're no COW on shared mappings normally. Private sh