[PATCH 0/2] uprobes,mm: speculative lockless VMA-to-uprobe lookup

[Andrii Nakryiko <andrii@kernel.org>]

Implement speculative (lockless) resolution of VMA to inode to uprobe,
bypassing the need to take mmap_lock for reads, if possible. Patch #1 by Suren
adds mm_struct helpers that help detect whether mm_struct were changed, which
is used by uprobe logic to validate that speculative results can be trusted
after all the lookup logic results in a valid uprobe instance.

I ran a few will-it-scale benchmarks to sanity check that patch #1 doesn't
introduce any noticeable regressions. Which it seems it doesn't.

Andrii Nakryiko (1):
  uprobes: add speculative lockless VMA-to-inode-to-uprobe resolution

Suren Baghdasaryan (1):
  mm: introduce mmap_lock_speculation_{start|end}

 include/linux/mm_types.h  |  3 +++
 include/linux/mmap_lock.h | 53 +++++++++++++++++++++++++++++++--------
 kernel/events/uprobes.c   | 51 +++++++++++++++++++++++++++++++++++++
 kernel/fork.c             |  3 ---
 4 files changed, 97 insertions(+), 13 deletions(-)

-- 
2.43.5