From: Frederic Weisbecker <fweisbec@gmail.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Li Zefan <lizf@cn.fujitsu.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Aditya Kali <adityakali@google.com>
Subject: Re: [PATCH 1/8] cgroups: Add res_counter_write_u64() API
Date: Tue, 9 Aug 2011 19:31:23 +0200 [thread overview]
Message-ID: <20110809173117.GB31645@somewhere.redhat.com> (raw)
In-Reply-To: <20110809151739.GB15311@redhat.com>
On Tue, Aug 09, 2011 at 05:17:39PM +0200, Oleg Nesterov wrote:
> On 07/29, Frederic Weisbecker wrote:
> >
> > +void res_counter_write_u64(struct res_counter *counter, int member, u64 val)
> > +{
> > + unsigned long long *target;
> > + unsigned long flags;
> > +
> > + spin_lock_irqsave(&counter->lock, flags);
> > + target = res_counter_member(counter, member);
> > + *target = val;
> > + spin_unlock_irqrestore(&counter->lock, flags);
> > +}
>
> Hmm. Why do we need counter->lock?
>
> OK, probably it is for BITS_PER_LONG < 64. May be it makes sense
> to ifdef, just to make the code more understandable.
Ok, will add that.
next prev parent reply other threads:[~2011-08-09 17:31 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-29 16:13 [PATCH 0/8 v3] cgroups: Task counter subsystem (was: New max number of tasks subsystem) Frederic Weisbecker
2011-07-29 16:13 ` [PATCH 1/8] cgroups: Add res_counter_write_u64() API Frederic Weisbecker
2011-08-09 15:17 ` Oleg Nesterov
2011-08-09 17:31 ` Frederic Weisbecker [this message]
2011-07-29 16:13 ` [PATCH 2/8] cgroups: New resource counter inheritance API Frederic Weisbecker
2011-07-29 16:13 ` [PATCH 3/8] cgroups: Add previous cgroup in can_attach_task/attach_task callbacks Frederic Weisbecker
2011-08-17 2:40 ` Li Zefan
2011-08-27 13:58 ` Frederic Weisbecker
2011-07-29 16:13 ` [PATCH 4/8] cgroups: New cancel_attach_task subsystem callback Frederic Weisbecker
2011-08-17 2:40 ` Li Zefan
2011-08-27 13:58 ` Frederic Weisbecker
2011-07-29 16:13 ` [PATCH 5/8] cgroups: Ability to stop res charge propagation on bounded ancestor Frederic Weisbecker
2011-08-17 2:41 ` Li Zefan
2011-08-27 13:59 ` Frederic Weisbecker
2011-07-29 16:13 ` [PATCH 6/8] cgroups: Add res counter common ancestor searching Frederic Weisbecker
2011-07-29 16:13 ` [PATCH 7/8] cgroups: Add a task counter subsystem Frederic Weisbecker
2011-08-01 23:13 ` Andrew Morton
2011-08-04 14:05 ` Frederic Weisbecker
2011-08-09 15:11 ` Oleg Nesterov
2011-08-09 17:27 ` Frederic Weisbecker
2011-08-09 17:57 ` Oleg Nesterov
2011-08-09 18:09 ` Frederic Weisbecker
2011-08-09 18:19 ` Oleg Nesterov
2011-08-09 18:34 ` Frederic Weisbecker
2011-08-09 18:39 ` Oleg Nesterov
2011-08-17 3:18 ` Li Zefan
2011-08-27 14:16 ` Frederic Weisbecker
2011-07-29 16:13 ` [PATCH 8/8] res_counter: Allow charge failure pointer to be null Frederic Weisbecker
2011-08-17 2:44 ` Li Zefan
2011-08-27 14:05 ` Frederic Weisbecker
2011-08-01 23:19 ` [PATCH 0/8 v3] cgroups: Task counter subsystem (was: New max number of tasks subsystem) Andrew Morton
2011-08-03 14:29 ` Frederic Weisbecker
2011-08-12 21:11 ` Tim Hockin
2011-08-16 16:01 ` Kay Sievers
2011-08-18 14:33 ` [RFD] Task counter: cgroup core feature or cgroup subsystem? (was Re: [PATCH 0/8 v3] cgroups: Task counter subsystem) Frederic Weisbecker
2011-08-23 16:07 ` Paul Menage
2011-08-24 17:54 ` Frederic Weisbecker
2011-08-26 7:28 ` Li Zefan
2011-08-26 14:58 ` Paul Menage
2011-09-06 9:06 ` Li Zefan
2011-08-26 15:16 ` Paul Menage
2011-08-27 13:40 ` Frederic Weisbecker
2011-08-31 22:36 ` Paul Menage
2011-08-31 21:54 ` Frederic Weisbecker
2012-01-13 18:13 [PATCH 0/8] cgroups: Task counter subsystem v7 Frederic Weisbecker
2012-01-13 18:13 ` [PATCH 1/8] cgroups: add res_counter_write_u64() API Frederic Weisbecker
2012-01-13 18:13 ` Frederic Weisbecker
2012-01-16 12:27 ` Kirill A. Shutemov
2012-01-25 18:31 ` Frederic Weisbecker
2012-01-25 18:35 ` Kirill A. Shutemov
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