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

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Message-ID: <20181009092938.GH8528@dhcp22.suse.cz>
Date:   Tue, 9 Oct 2018 11:29:38 +0200
From:   Michal Hocko <mhocko@...nel.org>
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,
        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 Fri 05-10-18 13:40:05, 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.

Acked-by: Michal Hocko <mhocko@...e.com>

Thanks for your patience with all the resubmission.
-- 
Michal Hocko
SUSE Labs