linux-kernel - Re: [PATCH] mm/percpu.c: use smarter memory allocation for struct pcpu_alloc

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Message-ID: <20171003210540.GM3301751@devbig577.frc2.facebook.com>
Date:   Tue, 3 Oct 2017 14:05:40 -0700
From:   Tejun Heo <tj@...nel.org>
To:     Nicolas Pitre <nicolas.pitre@...aro.org>
Cc:     Christoph Lameter <cl@...ux.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/percpu.c: use smarter memory allocation for struct
 pcpu_alloc_info

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