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| author | Paul E. McKenney <paulmck@kernel.org> | 2025-01-10 00:24:44 +0300 |
|---|---|---|
| committer | Boqun Feng <boqun.feng@gmail.com> | 2025-02-05 18:12:05 +0300 |
| commit | 176d19eecb4821e541e68fdc57b2d7907b52cfd1 (patch) | |
| tree | 07b0af52022bcc39436d4a63038a7fe2c41dc1f6 | |
| parent | c4020620528e4e22a051900654a70dcff0ab218d (diff) | |
| download | linux-176d19eecb4821e541e68fdc57b2d7907b52cfd1.tar.xz | |
rcutorture: Add ability to test srcu_read_{,un}lock_fast()
This commit permits rcutorture to test srcu_read_{,un}lock_fast(), which
is specified by the rcutorture.reader_flavor=0x8 kernel boot parameter.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: <bpf@vger.kernel.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
| -rw-r--r-- | kernel/rcu/rcutorture.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 1d2de50fb5d6..1bd3eaa0b8e7 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -677,6 +677,7 @@ static void srcu_get_gp_data(int *flags, unsigned long *gp_seq) static int srcu_torture_read_lock(void) { int idx; + struct srcu_ctr __percpu *scp; int ret = 0; if ((reader_flavor & SRCU_READ_FLAVOR_NORMAL) || !(reader_flavor & SRCU_READ_FLAVOR_ALL)) { @@ -694,6 +695,12 @@ static int srcu_torture_read_lock(void) WARN_ON_ONCE(idx & ~0x1); ret += idx << 2; } + if (reader_flavor & SRCU_READ_FLAVOR_FAST) { + scp = srcu_read_lock_fast(srcu_ctlp); + idx = __srcu_ptr_to_ctr(srcu_ctlp, scp); + WARN_ON_ONCE(idx & ~0x1); + ret += idx << 3; + } return ret; } @@ -719,6 +726,8 @@ srcu_read_delay(struct torture_random_state *rrsp, struct rt_read_seg *rtrsp) static void srcu_torture_read_unlock(int idx) { WARN_ON_ONCE((reader_flavor && (idx & ~reader_flavor)) || (!reader_flavor && (idx & ~0x1))); + if (reader_flavor & SRCU_READ_FLAVOR_FAST) + srcu_read_unlock_fast(srcu_ctlp, __srcu_ctr_to_ptr(srcu_ctlp, (idx & 0x8) >> 3)); if (reader_flavor & SRCU_READ_FLAVOR_LITE) srcu_read_unlock_lite(srcu_ctlp, (idx & 0x4) >> 2); if (reader_flavor & SRCU_READ_FLAVOR_NMI) |