linux-kernel - Re: [PATCH 2/2] mm: thp: give transparent hugepage code a separate copy

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Message-ID: <CAJd=RBAFgn=3GvEEdHDARpw_h+6SbYE_35D5QJX7C60cVd4tmA@mail.gmail.com>
Date:	Wed, 6 Nov 2013 21:46:20 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	Dave Hansen <dave@...1.net>
Cc:	LKML <linux-kernel@...r.kernel.org>, Linux-MM <linux-mm@...ck.org>,
	dave.jiang@...el.com, Mel Gorman <mgorman@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 2/2] mm: thp: give transparent hugepage code a separate copy_page

On Tue, Oct 29, 2013 at 6:16 AM, Dave Hansen <dave@...1.net> wrote:
> +
> +void copy_high_order_page(struct page *newpage,
> +                         struct page *oldpage,
> +                         int order)
> +{
> +       int i;
> +
> +       might_sleep();
> +       for (i = 0; i < (1<<order); i++) {
> +               cond_resched();
> +               copy_highpage(newpage + i, oldpage + i);
> +       }
> +}

Can we make no  use of might_sleep here with cond_resched in loop?
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