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Date: Wed, 16 Jul 2014 21:26:42 -0400 From: Pranith Kumar <bobby.prani@...il.com> To: Lai Jiangshan <laijs@...fujitsu.com> CC: paulmck@...ux.vnet.ibm.com, josh@...htriplett.org, Steven Rostedt <rostedt@...dmis.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, "open list:READ-COPY UPDATE..." <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 2/3] rcu: Remove stale comment in tree.c On 07/16/2014 09:25 PM, Lai Jiangshan wrote: > On 07/17/2014 09:01 AM, Pranith Kumar wrote: >> On 07/16/2014 08:55 PM, Lai Jiangshan wrote: >>> On 07/16/2014 09:29 PM, Pranith Kumar wrote: >>>> On 07/16/2014 08:47 AM, Paul E. McKenney wrote: >>>>> On Tue, Jul 15, 2014 at 06:57:59PM -0400, Pranith Kumar wrote: >>>>>> >>>>>> On 07/15/2014 06:53 PM, josh@...htriplett.org wrote: >>>>>>> On Tue, Jul 15, 2014 at 06:31:48PM -0400, Pranith Kumar wrote: >>>>>>>> This commit removes a stale comment in rcu/tree.c. >>>>>>>> FYI, an updated comment exists a few lines below this. >>>>>>>> >>>>>>>> Signed-off-by: Pranith Kumar <bobby.prani@...il.com> >>>>>>> In general, when removing a stale comment, I'd suggest explaining why >>>>>>> the comment is stale. Was code removed without removing the >>>>>>> corresponding comment, or was code changed such that the comment no >>>>>>> longer applies, or...? >>>>>> >>>>>> I guess it was left out when code was moved around previously. And I did mention that an updated comment is there a few lines below. >>>>>> >>>>>> For reference this is the new comment which is below the old comment, they mean the same :) >>>>>> >>>>>> /* Remove the outgoing CPU from the masks in the rcu_node hierarchy. */ >>>>> >>>>> Indeed that is the case. >>>>> >>>>> Please update the commit log with this explanation and resend. >>>>> >>>>> Thanx, Paul >>>>> >>>> >>>> Please find the updated patch below. >>>> >>>> -- >>>> Pranith >>>> >>>> From: Pranith Kumar <bobby.prani@...il.com> >>>> Date: Mon, 14 Jul 2014 16:01:05 -0400 >>>> Subject: [PATCH 2/3] rcu: Remove stale comment in tree.c >>>> >>>> This commit removes a stale comment in rcu/tree.c which was left out when some >>>> code was moved around previously. >>> >>> Which commit caused this leftover comment? Could you mention that commit in >>> your changlog? >>> >>> 12BitsCmmtID ("commit title...") >>> >> >> Sure, please find an updated patch with Josh Triplett's sign-off added: >> >> From: Pranith Kumar <bobby.prani@...il.com> >> Date: Mon, 14 Jul 2014 16:01:05 -0400 >> Subject: [PATCH 2/3] rcu: Remove stale comment in tree.c >> >> >> This commit removes a stale comment in rcu/tree.c which was left out in >> commit 2036d94a7b61ca5032ce (rcu: Rework detection of use of RCU by offline CPUs) > > I suggest you use the following syntax in future. > > 2036d94a7b61 ("rcu: Rework detection of use of RCU by offline CPUs") > OK. I will do that from now on. Thanks! :) -- Pranith >> >> For reference, the following updated comment exists a few lines below this which >> means the same. >> >> /* Remove the outgoing CPU from the masks in the rcu_node hierarchy. */ >> >> Signed-off-by: Pranith Kumar <bobby.prani@...il.com> >> Reviewed-by: Joe Tripplett <josh@...htriplett.org> > > Reviewed-by: Lai Jiangshan <laijs@...fujitsu.com> > >> --- >> kernel/rcu/tree.c | 2 -- >> 1 file changed, 2 deletions(-) >> >> diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c >> index a1abaa8..e67246e 100644 >> --- a/kernel/rcu/tree.c >> +++ b/kernel/rcu/tree.c >> @@ -2211,8 +2211,6 @@ static void rcu_cleanup_dead_cpu(int cpu, struct rcu_state *rsp) >> /* Adjust any no-longer-needed kthreads. */ >> rcu_boost_kthread_setaffinity(rnp, -1); >> >> - /* Remove the dead CPU from the bitmasks in the rcu_node hierarchy. */ >> - >> /* Exclude any attempts to start a new grace period. */ >> mutex_lock(&rsp->onoff_mutex); >> raw_spin_lock_irqsave(&rsp->orphan_lock, flags); > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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