linux-kernel - Re: [PATCH v5 1/2] memory_hotplug: Free pages as higher order

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Date:   Wed, 10 Oct 2018 13:01:19 +0200
From:   Oscar Salvador <osalvador@...hadventures.net>
To:     Arun KS <arunks@...eaurora.org>
Cc:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        boris.ostrovsky@...cle.com, jgross@...e.com,
        akpm@...ux-foundation.org, dan.j.williams@...el.com,
        mhocko@...e.com, vbabka@...e.cz, iamjoonsoo.kim@....com,
        gregkh@...uxfoundation.org, osalvador@...e.de, malat@...ian.org,
        kirill.shutemov@...ux.intel.com, jrdr.linux@...il.com,
        yasu.isimatu@...il.com, mgorman@...hsingularity.net,
        aaron.lu@...el.com, devel@...uxdriverproject.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        xen-devel@...ts.xenproject.org, vatsa@...eaurora.org,
        vinmenon@...eaurora.org, getarunks@...il.com
Subject: Re: [PATCH v5 1/2] memory_hotplug: Free pages as higher order

On Wed, Oct 10, 2018 at 04:21:16PM +0530, Arun KS wrote:
> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> index e379e85..2416136 100644
> --- a/mm/memory_hotplug.c
> +++ b/mm/memory_hotplug.c
> @@ -690,9 +690,13 @@ static int online_pages_range(unsigned long start_pfn,
> unsigned long nr_pages,
>                         void *arg)
>  {
>         unsigned long onlined_pages = *(unsigned long *)arg;
> +       u64 t1, t2;
> 
> +       t1 = local_clock();
>         if (PageReserved(pfn_to_page(start_pfn)))
>                 onlined_pages = online_pages_blocks(start_pfn, nr_pages);
> +       t2 = local_clock();
> +       trace_printk("time spend = %llu us\n", (t2-t1)/(1000));
> 
>         online_mem_sections(start_pfn, start_pfn + nr_pages);

Thanks ;-)
 

-- 
Oscar Salvador
SUSE L3