Linux-mm Archive on lore.kernel.org
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From: Tejun Heo <tj@kernel.org>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: Christopher Lameter <cl@linux.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Joonsoo Kim <iamjoonsoo.kim@lge.com>,
	David Rientjes <rientjes@google.com>,
	Pekka Enberg <penberg@kernel.org>,
	Lai Jiangshan <jiangshanlai@gmail.com>,
	John Stultz <john.stultz@linaro.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Stephen Boyd <sboyd@kernel.org>
Subject: Re: [RFC] mm, slab: reschedule cache_reap() on the same CPU
Date: Tue, 10 Apr 2018 13:23:53 -0700
Message-ID: <20180410202353.GB793541@devbig577.frc2.facebook.com> (raw)
In-Reply-To: <d4983f13-2c02-6082-f980-a6623ab363e6@suse.cz>

Hello,

On Tue, Apr 10, 2018 at 10:13:33PM +0200, Vlastimil Babka wrote:
> > For percpu work items, they'll keep executing on the same cpu it
> > started on unless the cpu goes down while executing.
> 
> Right, but before this patch, with just schedule_delayed_work() i.e.
> non-percpu? If such work can migrate in the middle, the slab bug is
> potentially much more serious.

That's still per-cpu.  The only time the local binding breaks is when
the kernel is explicitly told to do so through explicit unbound_mask
or force_rr debug option.

Thanks.

-- 
tejun

  reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-10  8:15 Vlastimil Babka
2018-04-10 14:12 ` Christopher Lameter
2018-04-10 14:17   ` Tejun Heo
2018-04-10 19:40   ` Vlastimil Babka
2018-04-10 19:53     ` Tejun Heo
2018-04-10 20:13       ` Vlastimil Babka
2018-04-10 20:23         ` Tejun Heo [this message]
2018-04-11  7:00 ` [PATCH] " Vlastimil Babka
2018-04-11 10:53   ` Pekka Enberg
2018-04-11 13:41     ` Christopher Lameter
2018-04-12  0:47   ` Minchan Kim
2018-04-13  8:44     ` Vlastimil Babka

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