From: "Luck, Tony" <tony.luck@intel.com>
To: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Xishi Qiu <qiuxishi@huawei.com>
Cc: "Izumi, Taku" <izumi.taku@jp.fujitsu.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"mel@csn.ul.ie" <mel@csn.ul.ie>,
"Hansen, Dave" <dave.hansen@intel.com>,
"matt@codeblueprint.co.uk" <matt@codeblueprint.co.uk>
Subject: RE: [PATCH v3 2/2] mm: Introduce kernelcore=mirror option
Date: Fri, 18 Dec 2015 06:59:08 +0000 [thread overview]
Message-ID: <3908561D78D1C84285E8C5FCA982C28F39F88DAC@ORSMSX114.amr.corp.intel.com> (raw)
In-Reply-To: <56736B7D.3040709@jp.fujitsu.com>
>Hmm...like this ?
> sysctl.vm.fallback_mirror_memory = 0 // never fallback # default.
> sysctl.vm.fallback_mirror_memory = 1 // the user memory may be allocated from mirrored zone.
> sysctl.vm.fallback_mirror_memory = 2 // usually kernel allocates memory from mirrored zone before OOM.
> sysctl.vm.fallback_mirror_memory = 3 // 1+2
Should option 2 say: // allow kernel to allocate from non-mirror zone to avoid OOM
> However I believe my customer's choice is always 0, above implementation can be done in a clean way.
> (adding a flag to zones (mirrored or not) and controlling fallback zonelist walk.)
Modes allow us to make all of the people happy (I hope).
> BTW, we need this Taku's patch to make a progress. I think other devs should be done in another
> development cycle. What does he need to get your Acks ?
The concept is great. It's even "Tested-by: Tony Luck <tony.luck@intel.com>".
I need to read the code more carefully before Acked-by.
-Tony
next prev parent reply other threads:[~2015-12-18 6:59 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-09 3:18 [PATCH v3 0/2] mm: Introduce kernelcore=mirror option Taku Izumi
2015-12-09 3:19 ` [PATCH v3 1/2] mm: Calculate zone_start_pfn at zone_spanned_pages_in_node() Taku Izumi
2015-12-09 3:19 ` [PATCH v3 2/2] mm: Introduce kernelcore=mirror option Taku Izumi
2015-12-09 3:28 ` Xishi Qiu
2015-12-09 21:59 ` Luck, Tony
2015-12-10 1:14 ` Xishi Qiu
2015-12-10 5:37 ` Izumi, Taku
2015-12-10 6:13 ` Xishi Qiu
2015-12-11 5:53 ` Izumi, Taku
2015-12-11 9:44 ` Xishi Qiu
2015-12-17 1:38 ` Izumi, Taku
2015-12-17 2:47 ` Xishi Qiu
2015-12-17 2:53 ` Kamezawa Hiroyuki
2015-12-17 4:48 ` Xishi Qiu
2015-12-17 5:01 ` Kamezawa Hiroyuki
2015-12-17 18:43 ` Luck, Tony
2015-12-18 2:12 ` Kamezawa Hiroyuki
2015-12-18 6:59 ` Luck, Tony [this message]
2015-12-28 22:21 ` Andrew Morton
2015-12-28 22:32 ` Andrew Morton
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