From: Jakub Kicinski <kuba@kernel.org>
To: allison.henderson@oracle.com
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH 1/6] net/rds: Avoid queuing superfluous send and recv work
Date: Fri, 28 Feb 2025 16:19:08 -0800 [thread overview]
Message-ID: <20250228161908.3d7c997c@kernel.org> (raw)
In-Reply-To: <20250227042638.82553-2-allison.henderson@oracle.com>
On Wed, 26 Feb 2025 21:26:33 -0700 allison.henderson@oracle.com wrote:
> + /* clear_bit() does not imply a memory barrier */
> + smp_mb__before_atomic();
> + clear_bit(RDS_SEND_WORK_QUEUED, &cp->cp_flags);
> + /* clear_bit() does not imply a memory barrier */
> + smp_mb__after_atomic();
I'm guessing the comments were added because checkpatch asked for them.
The comments are supposed to indicate what this barrier pairs with.
I don't see the purpose of these barriers, please document..
next prev parent reply other threads:[~2025-03-01 0:19 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-27 4:26 [PATCH 0/6] RDS bug fix collection allison.henderson
2025-02-27 4:26 ` [PATCH 1/6] net/rds: Avoid queuing superfluous send and recv work allison.henderson
2025-03-01 0:19 ` Jakub Kicinski [this message]
2025-03-05 0:38 ` Allison Henderson
2025-03-05 0:44 ` Jakub Kicinski
2025-03-06 16:41 ` Allison Henderson
2025-03-06 18:18 ` Jakub Kicinski
2025-03-07 20:28 ` Allison Henderson
2025-03-08 2:53 ` Jakub Kicinski
2025-03-12 7:50 ` Allison Henderson
2025-03-26 16:42 ` Jakub Kicinski
2025-04-02 1:34 ` Allison Henderson
2025-04-02 16:18 ` Jakub Kicinski
2025-04-03 1:27 ` Allison Henderson
2025-02-27 4:26 ` [PATCH 2/6] net/rds: Re-factor and avoid superfluous queuing of reconnect work allison.henderson
2025-02-27 4:26 ` [PATCH 3/6] net/rds: RDS/TCP does not initiate a connection allison.henderson
2025-02-27 4:26 ` [PATCH 4/6] net/rds: No shortcut out of RDS_CONN_ERROR allison.henderson
2025-03-01 0:19 ` Jakub Kicinski
2025-03-05 0:38 ` Allison Henderson
2025-02-27 4:26 ` [PATCH 5/6] net/rds: rds_tcp_accept_one ought to not discard messages allison.henderson
2025-03-01 0:21 ` Jakub Kicinski
2025-03-06 16:41 ` Allison Henderson
2025-03-01 23:22 ` kernel test robot
2025-03-05 0:43 ` Allison Henderson
2025-03-04 10:28 ` Dan Carpenter
2025-03-05 0:39 ` Allison Henderson
2025-02-27 4:26 ` [PATCH 6/6] net/rds: Encode cp_index in TCP source port allison.henderson
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