From: Olaf Kirch <okir@suse.de>
To: Andy Grover <andy.grover@oracle.com>
Cc: Roland Dreier <rdreier@cisco.com>,
rds-devel@oss.oracle.com, general@lists.openfabrics.org,
netdev@vger.kernel.org
Subject: Re: [PATCH 17/21] RDS/IB: Receive datagrams via IB
Date: Thu, 29 Jan 2009 22:02:28 +0100 [thread overview]
Message-ID: <200901292202.28625.okir@suse.de> (raw)
In-Reply-To: <49811278.3050806@oracle.com>
On Thursday 29 January 2009 03:20:40 Andy Grover wrote:
> > This is racy. You check if you're at the limit, do the allocation, and
> > then increment the atomic rds_ib_allocation count. So many threads can
> > pass the atomic_read() test and then take you over the limit. If you
> > want to make it safe then you could do atomic_inc_return() and check if
> > that took you over the limit.
>
> Woah, yup, thanks.
The refill code used to be single-threaded; and I think it still is. So
this can't race I think
Olaf
next prev parent reply other threads:[~2009-01-29 21:02 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-27 2:17 [ofa-general] [PATCH 0/21] Reliable Datagram Sockets (RDS) Andy Grover
2009-01-27 2:17 ` [ofa-general] [PATCH 01/21] RDS: Socket interface Andy Grover
2009-01-27 3:46 ` Stephen Hemminger
2009-01-29 3:17 ` [ofa-general] " Andrew Grover
2009-01-27 4:11 ` David Miller
2009-01-29 20:22 ` [ofa-general] ***SPAM*** " Andrew Grover
2009-01-27 12:08 ` Evgeniy Polyakov
2009-01-29 4:02 ` [ofa-general] " Andrew Grover
2009-01-29 16:24 ` Evgeniy Polyakov
2009-01-27 2:17 ` [ofa-general] [PATCH 02/21] RDS: Main header file Andy Grover
2009-01-27 7:34 ` Rémi Denis-Courmont
2009-01-27 19:27 ` [ofa-general] " Andrew Grover
2009-01-27 13:05 ` Evgeniy Polyakov
2009-01-27 19:23 ` [ofa-general] ***SPAM*** " Andrew Grover
2009-01-27 19:24 ` Steve Wise
2009-01-27 2:17 ` [PATCH 03/21] RDS: Congestion-handling code Andy Grover
2009-01-27 3:48 ` Stephen Hemminger
2009-01-27 19:15 ` Andrew Grover
2009-01-27 13:10 ` Evgeniy Polyakov
2009-01-27 19:10 ` Andrew Grover
2009-01-28 22:57 ` Roland Dreier
2009-01-29 2:39 ` [ofa-general] " Andy Grover
2009-01-27 2:17 ` [PATCH 04/21] RDS: Transport code Andy Grover
2009-01-27 13:18 ` Evgeniy Polyakov
2009-01-27 19:36 ` Andrew Grover
2009-01-27 21:56 ` [ofa-general] " Evgeniy Polyakov
2009-01-27 22:15 ` [ofa-general] ***SPAM*** " Andrew Grover
2009-01-27 2:17 ` [ofa-general] [PATCH 05/21] RDS: Info and stats Andy Grover
2009-01-27 13:28 ` Evgeniy Polyakov
2009-01-27 2:17 ` [PATCH 06/21] RDS: Connection handling Andy Grover
2009-01-27 13:34 ` Evgeniy Polyakov
2009-01-27 13:47 ` Oliver Neukum
2009-01-27 13:51 ` Evgeniy Polyakov
2009-01-27 16:28 ` [ofa-general] " Steve Wise
2009-01-29 3:03 ` ***SPAM*** " Andrew Grover
2009-01-29 8:03 ` Evgeniy Polyakov
2009-01-27 2:17 ` [PATCH 07/21] RDS: loopback Andy Grover
2009-01-27 2:17 ` [PATCH 08/21] RDS: sysctls Andy Grover
2009-01-27 2:17 ` [PATCH 09/21] RDS: Message parsing Andy Grover
2009-01-27 2:17 ` [PATCH 10/21] RDS: send.c Andy Grover
2009-01-27 2:17 ` [PATCH 11/21] RDS: recv.c Andy Grover
2009-01-27 2:17 ` [PATCH 12/21] RDS: RDMA support Andy Grover
2009-01-27 2:17 ` [ofa-general] [PATCH 13/21] RDS/IB: Infiniband transport Andy Grover
2009-01-27 2:17 ` [PATCH 14/21] RDS/IB: Ring-handling code Andy Grover
2009-01-27 2:17 ` [PATCH 15/21] RDS/IB: Implement RDMA ops using FMRs Andy Grover
2009-01-27 2:17 ` [PATCH 16/21] RDS/IB: Implement IB-specific datagram send Andy Grover
2009-01-27 2:17 ` [PATCH 17/21] RDS/IB: Receive datagrams via IB Andy Grover
2009-01-29 0:05 ` [ofa-general] " Roland Dreier
2009-01-29 2:20 ` Andy Grover
2009-01-29 21:02 ` Olaf Kirch [this message]
2009-01-29 21:47 ` Roland Dreier
2009-01-27 2:17 ` [PATCH 18/21] RDS/IB: Stats and sysctls Andy Grover
2009-01-27 2:17 ` [PATCH 19/21] RDS: Documentation Andy Grover
2009-01-27 2:17 ` [PATCH 20/21] RDS: Kconfig and Makefile Andy Grover
2009-01-28 22:59 ` Roland Dreier
2009-01-29 2:19 ` [ofa-general] " Andy Grover
2009-01-29 5:14 ` Roland Dreier
2009-01-27 2:17 ` [PATCH 21/21] RDS: Add AF and PF #defines for RDS sockets Andy Grover
2009-01-27 7:27 ` Rémi Denis-Courmont
2009-01-27 19:31 ` [ofa-general] " Andrew Grover
2009-01-27 15:34 ` [ofa-general] [PATCH 0/21] Reliable Datagram Sockets (RDS) Steve Wise
2009-01-27 19:29 ` ***SPAM*** " Andrew Grover
2009-01-28 22:37 ` Roland Dreier
2009-01-29 1:29 ` [ofa-general] " Andy Grover
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