On 2024-10-07 15:47, Boqun Feng wrote:
On Thu, Oct 03, 2024 at 09:30:53AM -0400, Mathieu Desnoyers wrote:
[...]
+ /*
+* Use RCU dereference without lockdep checks, because
+* lockdep is not aware of HP guarantees.
+*/
+ addr2 = rcu_access_pointer(*addr_p);
On Thu, Oct 03, 2024 at 09:30:53AM -0400, Mathieu Desnoyers wrote:
[...]
> > > + /*
> > > + * Use RCU dereference without lockdep checks, because
> > > + * lockdep is not aware of HP guarantees.
> > > + */
> > > + addr2 = rcu_access_pointer(*addr_p);/* Load A */
> >
> > Why rcu_access_point
On 2024-10-03 02:24, Boqun Feng wrote:
On Tue, Oct 01, 2024 at 09:02:04PM -0400, Mathieu Desnoyers wrote:
[...]
+/*
+ * hp_allocate: Allocate a hazard pointer.
+ *
+ * Allocate a hazard pointer slot for @addr. The object existence should
+ * be guaranteed by the caller.
+ *
+ * Returns a hazard
On Tue, Oct 01, 2024 at 09:02:04PM -0400, Mathieu Desnoyers wrote:
> This API provides existence guarantees of objects through Hazard
> Pointers (HP).
>
> Each HP domain defines a fixed number of hazard pointer slots (nr_cpus)
> across the entire system.
>
> Its main benefit over RCU is that it a
This API provides existence guarantees of objects through Hazard
Pointers (HP).
Each HP domain defines a fixed number of hazard pointer slots (nr_cpus)
across the entire system.
Its main benefit over RCU is that it allows fast reclaim of
HP-protected pointers without needing to wait for a grace p
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