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From: Tejun Heo <tj@kernel.org>
To: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Christoph Lameter <cl@linux.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/percpu.c: use smarter memory allocation for struct pcpu_alloc_info
Date: Tue, 3 Oct 2017 14:05:40 -0700	[thread overview]
Message-ID: <20171003210540.GM3301751@devbig577.frc2.facebook.com> (raw)
In-Reply-To: <nycvar.YSQ.7.76.1710031638450.5407@knanqh.ubzr>

On Tue, Oct 03, 2017 at 04:57:44PM -0400, Nicolas Pitre wrote:
> This can be much smaller than a page on very small memory systems. 
> Always rounding up the size to a page is wasteful in that case, and 
> required alignment is smaller than the memblock default. Let's round 
> things up to a page size only when the actual size is >= page size, and 
> then it makes sense to page-align for a nicer allocation pattern.

Isn't that a temporary area which gets freed later during boot?

Thanks.

-- 
tejun

  reply	other threads:[~2017-10-03 21:05 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-03 20:57 [PATCH] mm/percpu.c: use smarter memory allocation for struct pcpu_alloc_info Nicolas Pitre
2017-10-03 21:05 ` Tejun Heo [this message]
2017-10-03 22:29   ` Nicolas Pitre
2017-10-03 22:36     ` Tejun Heo
2017-10-03 23:48       ` Dennis Zhou
2017-10-04  0:13         ` Nicolas Pitre
2017-10-04 14:15     ` Tejun Heo
2017-11-18 18:25     ` mm/percpu.c: use smarter memory allocation for struct pcpu_alloc_info (crisv32 hang) Guenter Roeck
2017-11-19 20:36       ` Nicolas Pitre
2017-11-20  2:03         ` Guenter Roeck
2017-11-20  4:08           ` Nicolas Pitre
2017-11-20  5:05             ` Guenter Roeck
2017-11-20 18:18               ` Nicolas Pitre
2017-11-20 18:51                 ` Guenter Roeck
2017-11-20 20:21                   ` Nicolas Pitre
2017-11-20 21:11                     ` Guenter Roeck
2017-11-21  0:28                       ` Nicolas Pitre
2017-11-21  1:48                         ` Guenter Roeck
2017-11-21  3:50                           ` Nicolas Pitre
2017-11-22 15:34                             ` Jesper Nilsson
2017-11-22 20:17                               ` Nicolas Pitre
2017-11-23  7:56                                 ` Jesper Nilsson
2017-11-27 19:41       ` Tejun Heo
2017-11-27 20:31         ` Nicolas Pitre
2017-11-27 20:33           ` Tejun Heo
2017-11-27 20:51             ` Nicolas Pitre
2017-11-27 20:54               ` Tejun Heo
2017-11-27 21:11                 ` Guenter Roeck
2017-11-28  8:19               ` Jesper Nilsson

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