[PATCH v2 0/3] uprobes: two common case speed ups

[Andrii Nakryiko]

This patch set implements two speed ups for uprobe/uretprobe runtime execution
path for some common scenarios: BPF-only uprobes (patches #1 and #2) and
system-wide (non-PID-specific) uprobes (patch #3). Please see individual
patches for details.

v1->v2:
  - rebased onto trace/core branch of tracing tree, hopefully I guessed right;
  - simplified user_cpu_buffer usage further (Oleg Nesterov);
  - simplified patch #3, just moved speculative check outside of lock (Oleg);
  - added Reviewed-by from Jiri Olsa.

Andrii Nakryiko (3):
  uprobes: encapsulate preparation of uprobe args buffer
  uprobes: prepare uprobe args buffer lazily
  uprobes: add speculative lockless system-wide uprobe filter check

 kernel/trace/trace_uprobe.c | 103 +++++++++++++++++++++---------------
 1 file changed, 59 insertions(+), 44 deletions(-)

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2.43.0