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From: Oscar Salvador <osalvador@techadventures.net>
To: Arun KS <arunks@codeaurora.org>
Cc: kys@microsoft.com, haiyangz@microsoft.com,
	sthemmin@microsoft.com, boris.ostrovsky@oracle.com,
	jgross@suse.com, akpm@linux-foundation.org,
	dan.j.williams@intel.com, mhocko@suse.com, vbabka@suse.cz,
	iamjoonsoo.kim@lge.com, gregkh@linuxfoundation.org,
	osalvador@suse.de, malat@debian.org,
	kirill.shutemov@linux.intel.com, jrdr.linux@gmail.com,
	yasu.isimatu@gmail.com, mgorman@techsingularity.net,
	aaron.lu@intel.com, devel@linuxdriverproject.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	xen-devel@lists.xenproject.org, vatsa@codeaurora.org,
	vinmenon@codeaurora.org, getarunks@gmail.com
Subject: Re: [PATCH v5 1/2] memory_hotplug: Free pages as higher order
Date: Mon, 8 Oct 2018 09:34:22 +0200
Message-ID: <20181008073421.GA9703@techadventures.net> (raw)
In-Reply-To: <1538727006-5727-1-git-send-email-arunks@codeaurora.org>

On Fri, Oct 05, 2018 at 01:40:05PM +0530, Arun KS wrote:
> When free pages are done with higher order, time spend on
> coalescing pages by buddy allocator can be reduced. With
> section size of 256MB, hot add latency of a single section
> shows improvement from 50-60 ms to less than 1 ms, hence
> improving the hot add latency by 60%. Modify external
> providers of online callback to align with the change.
> 
> Signed-off-by: Arun KS <arunks@codeaurora.org>

Looks good to me.

Reviewed-by: Oscar Salvador <osalvador@suse.de>

Just one thing below:
  
> @@ -1331,7 +1331,7 @@ void __init __free_pages_bootmem(struct page *page, unsigned long pfn,
>  {
>  	if (early_page_uninitialised(pfn))
>  		return;
> -	return __free_pages_boot_core(page, order);
> +	return __free_pages_core(page, order);

__free_pages_core is void, so I guess we do not need that return there.
Probably the code generated is the same though.
-- 
Oscar Salvador
SUSE L3

  parent reply index

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-05  8:10 Arun KS
2018-10-05  8:10 ` [PATCH v5 2/2] mm/page_alloc: remove software prefetching in __free_pages_core Arun KS
2018-10-09  9:30   ` Michal Hocko
2018-10-10 16:36   ` Vlastimil Babka
2018-10-08  7:34 ` Oscar Salvador [this message]
2018-10-09  9:29 ` [PATCH v5 1/2] memory_hotplug: Free pages as higher order Michal Hocko
2018-10-09  9:54   ` Arun KS
2018-10-09 11:06     ` Michal Hocko
2018-10-10  8:07 ` Oscar Salvador
2018-10-10 10:51   ` Arun KS
2018-10-10 11:01     ` Oscar Salvador
2018-10-10 15:30 ` Vlastimil Babka
2018-10-10 16:56   ` Arun KS
2018-10-10 17:33     ` Michal Hocko
2018-10-11  2:29       ` Arun KS
2018-10-11  7:55         ` Michal Hocko
2018-10-19  2:18           ` Andrew Morton
2018-10-19  8:07             ` Michal Hocko
2018-10-22 10:33               ` Arun KS
2018-11-05  9:42                 ` Arun KS
2018-11-05 21:44                   ` Andrew Morton
2018-11-06  5:31                     ` Arun KS
2018-10-11  8:07     ` Vlastimil Babka
2018-10-11  8:15       ` Michal Hocko
2018-11-19 22:15       ` Wei Yang

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