From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Matt Mackall <mpm@selenic.com>
Cc: linux-kernel@vger.kernel.org, mingo@elte.hu,
laijs@cn.fujitsu.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca,
josh@joshtriplett.org, dvhltc@us.ibm.com, niv@us.ibm.com,
tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org,
Valdis.Kletnieks@vt.edu, dhowells@redhat.com,
eric.dumazet@gmail.com,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
"David S. Miller" <davem@davemloft.net>,
Alexey Dobriyan <adobriyan@gmail.com>,
Jens Axboe <jens.axboe@oracle.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Greg Kroah-Hartman <gregkh@suse.de>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Christoph Lameter <cl@linux-foundation.org>,
Pekka Enberg <penberg@cs.helsinki.fi>,
Stephen Smalley <sds@tycho.nsa.gov>,
James Morris <jmorris@namei.org>,
Eric Paris <eparis@parisplace.org>
Subject: Re: [PATCH tip/core/rcu 21/48] remove all rcu head initializations, except on_stack initializations
Date: Tue, 4 May 2010 13:36:09 -0700 [thread overview]
Message-ID: <20100504203609.GF2639@linux.vnet.ibm.com> (raw)
In-Reply-To: <1273004823.21962.2278.camel@calx>
On Tue, May 04, 2010 at 03:27:03PM -0500, Matt Mackall wrote:
> On Tue, 2010-05-04 at 13:19 -0700, Paul E. McKenney wrote:
> > From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
> >
> > Remove all rcu head inits. We don't care about the RCU head state before passing
> > it to call_rcu() anyway. Only leave the "on_stack" variants so debugobjects can
> > keep track of objects on stack.
>
> Please document that distinction at the definition of INIT_RCU_HEADS,
> otherwise we're sure to see creep.
Hello, Matt,
RCU_HEAD_INIT() is no more. Or will be no more after this patchset.
However, now that you mention it, we do need docbook comments for
init_rcu_head_on_stack() and friends. I will fix that.
Thanx, Paul
next prev parent reply other threads:[~2010-05-04 20:36 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-04 20:19 [PATCH tip/core/rcu 0/48] v4 patches queued for 2.6.35 Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 01/48] rcu: optionally leave lockdep enabled after RCU lockdep splat Paul E. McKenney
2010-05-05 22:46 ` Mathieu Desnoyers
2010-05-05 23:05 ` Paul E. McKenney
2010-05-05 23:24 ` Mathieu Desnoyers
2010-05-05 23:36 ` Paul E. McKenney
2010-05-06 2:05 ` Mathieu Desnoyers
2010-05-06 23:09 ` Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 02/48] rcu: substitute set_need_resched for sending resched IPIs Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 03/48] rcu: make dead code really dead Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 04/48] rcu: move some code from macro to function Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 05/48] rcu: ignore offline CPUs in last non-dyntick-idle CPU check Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 06/48] rcu: Fix bogus CONFIG_PROVE_LOCKING in comments to reflect reality Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 07/48] rcu: fix now-bogus rcu_scheduler_active comments Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 08/48] rcu: shrink rcutiny by making synchronize_rcu_bh() be inline Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 09/48] rcu: rename rcutiny rcu_ctrlblk to rcu_sched_ctrlblk Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 10/48] rcu: refactor RCU's context-switch handling Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 11/48] rcu: slim down rcutiny by removing rcu_scheduler_active and friends Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 12/48] rcu: enable CPU_STALL_VERBOSE by default Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 13/48] rcu: disable CPU stall warnings upon panic Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 14/48] rcu: print boot-time console messages if RCU configs out of ordinary Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 15/48] rcu: improve RCU CPU stall-warning messages Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 16/48] rcu: permit discontiguous cpu_possible_mask CPU numbering Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 17/48] rcu: v2: reduce the number of spurious RCU_SOFTIRQ invocations Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 18/48] rcu: improve the RCU CPU-stall warning documentation Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 19/48] Debugobjects transition check Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 20/48] rcu head introduce rcu head init on stack Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 21/48] remove all rcu head initializations, except on_stack initializations Paul E. McKenney
2010-05-04 20:27 ` Matt Mackall
2010-05-04 20:36 ` Paul E. McKenney [this message]
2010-05-04 23:44 ` James Morris
2010-05-05 0:03 ` Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 22/48] rcu head remove init Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 23/48] tree/tiny rcu: Add debug RCU head objects (v5) Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 24/48] rcu: make SRCU usable in modules Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 25/48] rcu: fix debugobjects rcu head init on stack in rcutree_plugin.h Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 26/48] rcu: RCU_FAST_NO_HZ must check RCU dyntick state Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 27/48] vfs: add fs.h to define struct file Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 28/48] net: Make accesses to ->br_port safe for sparse RCU Paul E. McKenney
2010-05-04 21:26 ` Stephen Hemminger
2010-05-04 21:41 ` Arnd Bergmann
2010-05-05 22:03 ` Paul E. McKenney
2010-05-06 14:09 ` Arnd Bergmann
2010-05-06 23:12 ` Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 29/48] rcu: add an rcu_dereference_index_check() Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 30/48] mce: convert to rcu_dereference_index_check() Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 31/48] rcu: define __rcu address space modifier for sparse Paul E. McKenney
2010-05-04 20:58 ` Arnd Bergmann
2010-05-04 23:07 ` Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 32/48] rculist: avoid __rcu annotations Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 33/48] cgroups: " Paul E. McKenney
2010-05-04 20:48 ` Paul Menage
2010-05-05 0:04 ` Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 34/48] credentials: rcu annotation Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 35/48] keys: __rcu annotations Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 36/48] nfs: " Paul E. McKenney
2010-05-05 10:14 ` David Howells
2010-05-05 12:44 ` Trond Myklebust
2010-05-05 21:01 ` Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 37/48] net: __rcu annotations for drivers Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 38/48] perf_event: __rcu annotations Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 39/48] notifiers: " Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 40/48] radix-tree: " Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 41/48] idr: " Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 42/48] input: " Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 43/48] vhost: add " Paul E. McKenney
2010-05-04 21:39 ` Michael S. Tsirkin
2010-05-04 23:57 ` Paul E. McKenney
2010-05-04 23:59 ` Michael S. Tsirkin
2010-05-05 0:39 ` Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 44/48] net/netfilter: " Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 45/48] kvm: add " Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 46/48] kernel: " Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 47/48] net: " Paul E. McKenney
2010-05-04 20:19 ` [PATCH tip/core/rcu 48/48] kvm: more " Paul E. McKenney
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