| Message ID | 20230724094354.90817-19-zhengqi.arch@bytedance.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | use refcount+RCU method to implement lockless slab shrink | expand |
> On Jul 24, 2023, at 17:43, Qi Zheng <zhengqi.arch@bytedance.com> wrote: > > Use new APIs to dynamically allocate the rcu-kfree shrinker. > > Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com> > --- > kernel/rcu/tree.c | 21 +++++++++++++-------- > 1 file changed, 13 insertions(+), 8 deletions(-) > > diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c > index 1449cb69a0e0..d068ce3567fc 100644 > --- a/kernel/rcu/tree.c > +++ b/kernel/rcu/tree.c > @@ -3445,12 +3445,7 @@ kfree_rcu_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) > return freed == 0 ? SHRINK_STOP : freed; > } > > -static struct shrinker kfree_rcu_shrinker = { > - .count_objects = kfree_rcu_shrink_count, > - .scan_objects = kfree_rcu_shrink_scan, > - .batch = 0, > - .seeks = DEFAULT_SEEKS, > -}; > +static struct shrinker *kfree_rcu_shrinker; Same as patch #17.
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 1449cb69a0e0..d068ce3567fc 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3445,12 +3445,7 @@ kfree_rcu_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) return freed == 0 ? SHRINK_STOP : freed; } -static struct shrinker kfree_rcu_shrinker = { - .count_objects = kfree_rcu_shrink_count, - .scan_objects = kfree_rcu_shrink_scan, - .batch = 0, - .seeks = DEFAULT_SEEKS, -}; +static struct shrinker *kfree_rcu_shrinker; void __init kfree_rcu_scheduler_running(void) { @@ -4958,8 +4953,18 @@ static void __init kfree_rcu_batch_init(void) INIT_DELAYED_WORK(&krcp->page_cache_work, fill_page_cache_func); krcp->initialized = true; } - if (register_shrinker(&kfree_rcu_shrinker, "rcu-kfree")) - pr_err("Failed to register kfree_rcu() shrinker!\n"); + + kfree_rcu_shrinker = shrinker_alloc(0, "rcu-kfree"); + if (!kfree_rcu_shrinker) { + pr_err("Failed to allocate kfree_rcu() shrinker!\n"); + return; + } + + kfree_rcu_shrinker->count_objects = kfree_rcu_shrink_count; + kfree_rcu_shrinker->scan_objects = kfree_rcu_shrink_scan; + kfree_rcu_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(kfree_rcu_shrinker); } void __init rcu_init(void)
Use new APIs to dynamically allocate the rcu-kfree shrinker. Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com> --- kernel/rcu/tree.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-)