From: Lin Ma <lma@suse.com>
To: qemu-devel@nongnu.org
Cc: quintela@redhat.com, dgilbert@redhat.com, Lin Ma <lma@suse.com>
Subject: [PATCH 0/3] Postcopy migration: Add userfaultfd- user-mode-only capability
Date: Thu, 14 Oct 2021 17:15:48 +0800 [thread overview]
Message-ID: <20211014091551.15201-1-lma@suse.com> (raw)
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 userfaultfd: add user-mode only option to unprivileged_userfaultfd sysctl knob
This patch set adds a migration capability to pass UFFD_USER_MODE_ONLY
for postcopy migration.
Lin Ma (3):
migration: introduce postcopy-uffd-usermode-only capability
migration: postcopy-uffd-usermode-only documentation
tests: add postcopy-uffd-usermode-only capability into migration-test
docs/devel/migration.rst | 9 +++++++++
migration/migration.c | 9 +++++++++
migration/migration.h | 1 +
migration/postcopy-ram.c | 22 +++++++++++++++++++---
qapi/migration.json | 8 +++++++-
tests/qtest/migration-test.c | 11 +++++++++--
6 files changed, 54 insertions(+), 6 deletions(-)
--
2.26.2
next reply other threads:[~2021-10-14 9:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-14 9:15 Lin Ma [this message]
2021-10-14 9:15 ` [PATCH 1/3] migration: introduce postcopy-uffd-usermode-only capability Lin Ma
2021-10-14 9:15 ` [PATCH 2/3] migration: postcopy-uffd-usermode-only documentation Lin Ma
2021-10-14 9:15 ` [PATCH 3/3] tests: add postcopy-uffd-usermode-only capability into migration-test Lin Ma
2021-10-14 23:43 ` [PATCH 0/3] Postcopy migration: Add userfaultfd- user-mode-only capability Peter Xu
2021-10-15 5:38 ` lma
2021-10-15 6:12 ` Peter Xu
2021-10-15 8:16 ` lma
2021-10-15 8:28 ` Peter Xu
2021-10-15 9:49 ` lma
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