Re: [PATCH v2] audit: unify audit_filter_{uring(),inode_name(),syscall()}

On Thu, Oct 6, 2022 at 8:49 PM Ankur Arora <ankur.a.arora(a)oracle.com&gt; wrote: > > audit_filter_uring(), audit_filter_inode_name() are substantially > similar to audit_filter_syscall(). Move the core logic to > __audit_filter_op() which can be parametrized for all three. > > On a Skylakex system, getpid() latency (all results aggregated > across 12 boot cycles): > > Min Mean Median Max pstdev > (ns) (ns) (ns) (ns) > > - 196.63 207.86 206.60 230.98 (+- 3.92%) > + 183.73 196.95 192.31 232.49 (+- 6.04%) > > Performance counter stats for 'bin/getpid' (3 runs) go from: > cycles 805.58 ( +- 4.11% ) > instructions 1654.11 ( +- .05% ) > IPC 2.06 ( +- 3.39% ) > branches 430.02 ( +- .05% ) > branch-misses 1.55 ( +- 7.09% ) > L1-dcache-loads 440.01 ( +- .09% ) > L1-dcache-load-misses 9.05 ( +- 74.03% ) > to: > cycles 765.37 ( +- 6.66% ) > instructions 1677.07 ( +- 0.04% ) > IPC 2.20 ( +- 5.90% ) > branches 431.10 ( +- 0.04% ) > branch-misses 1.60 ( +- 11.25% ) > L1-dcache-loads 521.04 ( +- 0.05% ) > L1-dcache-load-misses 6.92 ( +- 77.60% ) > > (Both aggregated over 12 boot cycles.) > > The increased L1-dcache-loads are due to some intermediate values now > coming from the stack. > > The improvement in cycles is due to a slightly denser loop (the list > parameter in the list_for_each_entry_rcu() exit check now comes from > a register rather than a constant as before.) > > Signed-off-by: Ankur Arora <ankur.a.arora(a)oracle.com&gt; > --- > kernel/auditsc.c | 76 +++++++++++++++++++++++++----------------------- > 1 file changed, 39 insertions(+), 37 deletions(-) Thanks, this looks good to me. I'll queue this up for when the merge window closes.