From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Boqun Feng <boqun.feng@gmail.com>
Cc: Jonas Oberhauser <jonas.oberhauser@huaweicloud.com>,
linux-kernel@vger.kernel.org, rcu@vger.kernel.org,
linux-mm@kvack.org, lkmm@lists.linux.dev,
"Paul E. McKenney" <paulmck@kernel.org>,
Frederic Weisbecker <frederic@kernel.org>,
Neeraj Upadhyay <neeraj.upadhyay@kernel.org>,
Joel Fernandes <joel@joelfernandes.org>,
Josh Triplett <josh@joshtriplett.org>,
Uladzislau Rezki <urezki@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Lai Jiangshan <jiangshanlai@gmail.com>,
Zqiang <qiang.zhang1211@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>,
Waiman Long <longman@redhat.com>,
Mark Rutland <mark.rutland@arm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Kent Overstreet <kent.overstreet@gmail.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>,
maged.michael@gmail.com,
Neeraj Upadhyay <neeraj.upadhyay@amd.com>
Subject: Re: [RFC PATCH 1/4] hazptr: Add initial implementation of hazard pointers
Date: Wed, 25 Sep 2024 15:20:59 +0200 [thread overview]
Message-ID: <e2733938-06fa-46c3-8839-4349fe50d46f@efficios.com> (raw)
In-Reply-To: <48992c9f-6c61-4716-977c-66e946adb399@efficios.com>
On 2024-09-25 15:10, Mathieu Desnoyers wrote:
[...]
Cleaner without goto in the user code:
#include <stdio.h>
#include <stdbool.h>
static inline
bool same_ptr(void *a, void *b)
{
asm goto (
"cmpq %[a], %[b]\n\t"
"jne %l[ne]\n\t"
: : [a] "r" (a), [b] "r" (b)
: : ne);
return true;
ne:
return false;
}
int x;
int v[2];
int main(void)
{
if (same_ptr(v, v + 1))
x = 1;
printf("%d\n", x);
return 0;
}
--
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com
next prev parent reply other threads:[~2024-09-25 13:21 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-17 14:33 [RFC PATCH 0/4] Add hazard pointers to kernel Boqun Feng
2024-09-17 14:33 ` [RFC PATCH 1/4] hazptr: Add initial implementation of hazard pointers Boqun Feng
2024-09-18 8:27 ` Mathieu Desnoyers
2024-09-18 15:17 ` Alan Huang
2024-09-19 6:56 ` Boqun Feng
2024-09-19 18:07 ` Jonas Oberhauser
2024-09-19 0:12 ` Jann Horn
2024-09-19 20:30 ` Jonas Oberhauser
2024-09-20 7:43 ` Jonas Oberhauser
2024-09-19 6:39 ` Lai Jiangshan
2024-09-19 7:10 ` Boqun Feng
2024-09-19 12:33 ` Alan Huang
2024-09-19 13:57 ` Alan Huang
2024-09-19 18:58 ` Boqun Feng
2024-09-19 19:53 ` Alan Huang
2024-09-19 16:10 ` Alan Huang
2024-09-19 14:00 ` Jonas Oberhauser
2024-09-20 7:41 ` Jonas Oberhauser
2024-09-25 10:02 ` Boqun Feng
2024-09-25 10:11 ` Jonas Oberhauser
2024-09-25 10:45 ` Boqun Feng
2024-09-25 11:59 ` Mathieu Desnoyers
2024-09-25 12:16 ` Boqun Feng
2024-09-25 12:47 ` Mathieu Desnoyers
2024-09-25 13:10 ` Mathieu Desnoyers
2024-09-25 13:20 ` Mathieu Desnoyers [this message]
2024-09-26 6:16 ` Mathieu Desnoyers
2024-09-26 15:53 ` Jonas Oberhauser
2024-09-26 16:12 ` Linus Torvalds
2024-09-26 16:40 ` Jonas Oberhauser
2024-09-26 16:54 ` Linus Torvalds
2024-09-27 0:01 ` Boqun Feng
2024-09-27 1:30 ` Mathieu Desnoyers
2024-09-27 1:37 ` Boqun Feng
2024-09-27 4:28 ` Boqun Feng
2024-09-27 10:59 ` Mathieu Desnoyers
2024-09-27 14:43 ` Mathieu Desnoyers
2024-09-27 15:22 ` Mathieu Desnoyers
2024-09-27 16:06 ` Alan Huang
2024-09-27 16:44 ` Linus Torvalds
2024-09-27 17:15 ` Mathieu Desnoyers
2024-09-27 17:23 ` Linus Torvalds
2024-09-27 17:51 ` Mathieu Desnoyers
2024-09-27 18:13 ` Linus Torvalds
2024-09-27 19:12 ` Jonas Oberhauser
2024-09-27 19:28 ` Linus Torvalds
2024-09-27 20:24 ` Linus Torvalds
2024-09-27 20:02 ` Mathieu Desnoyers
2024-09-27 1:20 ` Mathieu Desnoyers
2024-09-27 4:38 ` Boqun Feng
2024-09-27 19:23 ` Jonas Oberhauser
2024-09-27 20:10 ` Mathieu Desnoyers
2024-09-27 22:18 ` Jonas Oberhauser
2024-09-28 22:10 ` Alan Huang
2024-09-28 23:12 ` Alan Huang
2024-09-25 12:19 ` Jonas Oberhauser
2024-09-17 14:34 ` [RFC PATCH 2/4] refscale: Add benchmarks for hazptr Boqun Feng
2024-09-17 14:34 ` [RFC PATCH 3/4] refscale: Add benchmarks for percpu_ref Boqun Feng
2024-09-17 14:34 ` [RFC PATCH 4/4] WIP: hazptr: Add hazptr test sample Boqun Feng
2024-09-18 7:18 ` [RFC PATCH 0/4] Add hazard pointers to kernel Linus Torvalds
2024-09-18 22:44 ` Neeraj Upadhyay
2024-09-19 6:46 ` Linus Torvalds
2024-09-20 5:00 ` Neeraj Upadhyay
2024-09-19 14:30 ` Mateusz Guzik
2024-09-19 14:14 ` Christoph Hellwig
2024-09-19 14:21 ` Linus Torvalds
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