diff options
| author | Paul E. McKenney <[email protected]> | 2020-08-08 07:56:31 -0700 |
|---|---|---|
| committer | Paul E. McKenney <[email protected]> | 2020-08-24 18:40:27 -0700 |
| commit | a657f2617010ae237db5693f875968c28e8f732f (patch) | |
| tree | a4cf1d4ed7377d6829cfc0c1a968ce9b093d5607 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | 3d29aaf1ef992b5b4612fe32b9e6f517f7bba904 (diff) | |
rcu: Execute RCU reader shortly after rcu_core for strict GPs
A kernel built with CONFIG_RCU_STRICT_GRACE_PERIOD=y needs a quiescent
state to appear very shortly after a CPU has noticed a new grace period.
Placing an RCU reader immediately after this point is ineffective because
this normally happens in softirq context, which acts as a big RCU reader.
This commit therefore introduces a new per-CPU work_struct, which is
used at the end of rcu_core() processing to schedule an RCU read-side
critical section from within a clean environment.
Reported-by Jann Horn <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions