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From: Christopher Lameter <cl@linux.com>
To: Zi Yan <zi.yan@cs.rutgers.edu>
Cc: Thomas Schoebel-Theuer <tst@schoebel-theuer.de>,
	Mel Gorman <mgorman@techsingularity.net>,
	Matthew Wilcox <willy@infradead.org>,
	linux-mm@kvack.org, linux-rdma@vger.kernel.org,
	akpm@linux-foundation.org, andi@firstfloor.org,
	Rik van Riel <riel@redhat.com>, Michal Hocko <mhocko@kernel.org>,
	Guy Shattah <sguy@mellanox.com>,
	Anshuman Khandual <khandual@linux.vnet.ibm.com>,
	Michal Nazarewicz <mina86@mina86.com>,
	Vlastimil Babka <vbabka@suse.cz>,
	David Nellans <dnellans@nvidia.com>,
	Laura Abbott <labbott@redhat.com>, Pavel Machek <pavel@ucw.cz>,
	Dave Hansen <dave.hansen@intel.com>,
	Mike Kravetz <mike.kravetz@oracle.com>
Subject: Re: [RFC 1/2] Protect larger order pages from breaking up
Date: Thu, 22 Feb 2018 20:45:24 -0600 (CST)	[thread overview]
Message-ID: <alpine.DEB.2.20.1802222042290.2375@nuc-kabylake> (raw)
In-Reply-To: <1B85435E-A9FB-47E7-A2FE-FE21632778F0@cs.rutgers.edu>

On Thu, 22 Feb 2018, Zi Yan wrote:

> Yes. I saw the attached patches. I am definitely going to apply them and see how they work out.
>
> In his last patch, there are a bunch of magic numbers used to reserve free page blocks
> at different orders. I think that is the most interesting part. If Thomas can share how
> to determine these numbers with his theory based on workloads, hardware/chipset, that would
> be a great guideline for sysadmins to take advantage of the patches.

These numbers are specific to the loads encountered in his situation and
the patches are specific to the machine configurations in his environment.

I have tried to generalize his idea and produce a patchset that is
reviewable and acceptable. I will update the patchset as needed.


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  reply	other threads:[~2018-02-23  2:45 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-16 16:01 [RFC 0/2] Larger Order Protection V1 Christoph Lameter
2018-02-16 16:01 ` [RFC 1/2] Protect larger order pages from breaking up Christoph Lameter
2018-02-16 16:01   ` Christoph Lameter
     [not found]   ` <20180216160121.519788537-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>
2018-02-16 17:03     ` Andi Kleen
2018-02-16 17:03       ` Andi Kleen
     [not found]       ` <20180216170354.vpbuugzqsrrfc4js-1g7Xle2YJi4/4alezvVtWx2eb7JE58TQ@public.gmane.org>
2018-02-16 18:25         ` Christopher Lameter
2018-02-16 18:25           ` Christopher Lameter
2018-02-16 19:01     ` Dave Hansen
2018-02-16 19:01       ` Dave Hansen
2018-02-16 20:15       ` Christopher Lameter
2018-02-16 21:08         ` Dave Hansen
2018-02-16 21:08           ` Dave Hansen
2018-02-16 21:43           ` Matthew Wilcox
     [not found]             ` <20180216214353.GA32655-PfSpb0PWhxZc2C7mugBRk2EX/6BAtgUQ@public.gmane.org>
2018-02-16 21:47               ` Dave Hansen
2018-02-16 21:47                 ` Dave Hansen
2018-02-16 18:02   ` Randy Dunlap
     [not found]     ` <b76028c6-c755-8178-2dfc-81c7db1f8bed-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2018-02-17 16:07       ` Mike Rapoprt
2018-02-17 16:07         ` Mike Rapoprt
2018-02-16 18:59   ` Mike Kravetz
     [not found]     ` <5108eb20-2b20-bd48-903e-bce312e96974-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2018-02-16 20:13       ` Christopher Lameter
2018-02-16 20:13         ` Christopher Lameter
2018-02-18  9:00         ` Guy Shattah
2018-02-18  9:00           ` Guy Shattah
2018-02-19 10:19   ` Mel Gorman
2018-02-19 14:42     ` Michal Hocko
2018-02-19 15:09     ` Christopher Lameter
2018-02-22 21:19     ` Thomas Schoebel-Theuer
2018-02-22 21:53       ` Zi Yan
2018-02-23  2:01         ` Christopher Lameter
2018-02-23  2:16           ` Zi Yan
2018-02-23  2:45             ` Christopher Lameter [this message]
2018-02-23  9:59       ` Mel Gorman
2018-02-16 16:01 ` [RFC 2/2] Page order diagnostics Christoph Lameter
2018-02-16 16:01   ` Christoph Lameter
     [not found]   ` <20180216160121.583566579-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>
2018-02-17 21:17     ` Pavel Machek
2018-02-17 21:17       ` Pavel Machek
2018-02-19 14:54       ` Christopher Lameter
2018-02-16 18:27 ` [RFC 0/2] Larger Order Protection V1 Christopher Lameter

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