Re: [PATCH 0/3] Postcopy migration: Add userfaultfd- user-mode-only capability

2021-10-15 Thread lma
在 2021-10-15 16:28，Peter Xu 写道： On Fri, Oct 15, 2021 at 04:16:15PM +0800, lma wrote: 在 2021-10-15 14:12，Peter Xu 写道： > On Fri, Oct 15, 2021 at 01:38:06PM +0800, lma wrote: > > 在 2021-10-15 07:43，Peter Xu 写道： > > > On Thu, Oct 14, 2021 at 05:15:48PM +0800, Lin Ma wrote: > > > > Since kernel v5.11

Re: [PATCH 0/3] Postcopy migration: Add userfaultfd- user-mode-only capability

2021-10-15 Thread Peter Xu
On Fri, Oct 15, 2021 at 04:16:15PM +0800, lma wrote: > 在 2021-10-15 14:12，Peter Xu 写道： > > On Fri, Oct 15, 2021 at 01:38:06PM +0800, lma wrote: > > > 在 2021-10-15 07:43，Peter Xu 写道： > > > > On Thu, Oct 14, 2021 at 05:15:48PM +0800, Lin Ma wrote: > > > > > Since kernel v5.11, Unprivileged user (with

Re: [PATCH 0/3] Postcopy migration: Add userfaultfd- user-mode-only capability

2021-10-15 Thread lma
在 2021-10-15 14:12，Peter Xu 写道： On Fri, Oct 15, 2021 at 01:38:06PM +0800, lma wrote: 在 2021-10-15 07:43，Peter Xu 写道： > On Thu, Oct 14, 2021 at 05:15:48PM +0800, Lin Ma wrote: > > Since kernel v5.11, Unprivileged user (without SYS_CAP_PTRACE > > capability) > > must pass UFFD_USER_MODE_ONLY to us

Re: [PATCH 0/3] Postcopy migration: Add userfaultfd- user-mode-only capability

2021-10-14 Thread Peter Xu
On Fri, Oct 15, 2021 at 01:38:06PM +0800, lma wrote: > 在 2021-10-15 07:43，Peter Xu 写道： > > On Thu, Oct 14, 2021 at 05:15:48PM +0800, Lin Ma wrote: > > > Since kernel v5.11, Unprivileged user (without SYS_CAP_PTRACE > > > capability) > > > must pass UFFD_USER_MODE_ONLY to userfaultd in case > > > un

Re: [PATCH 0/3] Postcopy migration: Add userfaultfd- user-mode-only capability

2021-10-14 Thread lma
在 2021-10-15 07:43，Peter Xu 写道： On Thu, Oct 14, 2021 at 05:15:48PM +0800, Lin Ma wrote: Since kernel v5.11, Unprivileged user (without SYS_CAP_PTRACE capability) must pass UFFD_USER_MODE_ONLY to userfaultd in case unprivileged_userfaultfd sysctl knob is 0. Please refer to https://lwn.net/Artic

Re: [PATCH 0/3] Postcopy migration: Add userfaultfd- user-mode-only capability

2021-10-14 Thread Peter Xu
On Thu, Oct 14, 2021 at 05:15:48PM +0800, Lin Ma wrote: > Since kernel v5.11, Unprivileged user (without SYS_CAP_PTRACE capability) > must pass UFFD_USER_MODE_ONLY to userfaultd in case unprivileged_userfaultfd > sysctl knob is 0. > Please refer to https://lwn.net/Articles/819834/ and the kernel co

[PATCH 0/3] Postcopy migration: Add userfaultfd- user-mode-only capability

2021-10-14 Thread Lin Ma
Since kernel v5.11, Unprivileged user (without SYS_CAP_PTRACE capability) must pass UFFD_USER_MODE_ONLY to userfaultd in case unprivileged_userfaultfd sysctl knob is 0. Please refer to https://lwn.net/Articles/819834/ and the kernel commits: 37cd0575 userfaultfd: add UFFD_USER_MODE_ONLY d0d4730a us