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From: Jerome Glisse <jglisse@redhat.com>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
	dave@sr71.net, dan.j.williams@intel.com, dave.jiang@intel.com,
	zwisler@kernel.org, vishal.l.verma@intel.com,
	thomas.lendacky@amd.com, akpm@linux-foundation.org,
	mhocko@suse.com, linux-nvdimm@lists.01.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	ying.huang@intel.com, fengguang.wu@intel.com, bp@suse.de,
	bhelgaas@google.com, baiyaowei@cmss.chinamobile.com,
	tiwai@suse.de
Subject: Re: [PATCH 2/4] mm/memory-hotplug: allow memory resources to be children
Date: Wed, 23 Jan 2019 15:15:06 -0500	[thread overview]
Message-ID: <20190123201506.GG3097@redhat.com> (raw)
In-Reply-To: <b1f22eda-b52f-af20-637f-b45971a12d33@intel.com>

On Wed, Jan 23, 2019 at 12:03:54PM -0800, Dave Hansen wrote:
> On 1/16/19 3:38 PM, Jerome Glisse wrote:
> > So right now i would rather that we keep properly reporting this
> > hazard so that at least we know it failed because of that. This
> > also include making sure that we can not register private memory
> > as a child of an un-busy resource that does exist but might not
> > have yet been claim by its rightful owner.
> 
> I can definitely keep the warning in.  But, I don't think there's a
> chance of HMM registering a IORES_DESC_DEVICE_PRIVATE_MEMORY region as
> the child of another.  The region_intersects() check *should* find that:

Sounds fine to (just keep the warning).

Cheers,
Jérôme

> 
> >         for (; addr > size && addr >= iomem_resource.start; addr -= size) {
> >                 ret = region_intersects(addr, size, 0, IORES_DESC_NONE);
> >                 if (ret != REGION_DISJOINT)
> >                         continue;
> 

  reply	other threads:[~2019-01-23 20:15 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-16 18:18 [PATCH 0/4] Allow persistent memory to be used like normal RAM Dave Hansen
2019-01-16 18:19 ` [PATCH 1/4] mm/resource: return real error codes from walk failures Dave Hansen
2019-01-16 20:38   ` Bjorn Helgaas
2019-01-16 18:19 ` [PATCH 2/4] mm/memory-hotplug: allow memory resources to be children Dave Hansen
2019-01-16 19:16   ` Jerome Glisse
2019-01-16 23:01     ` Dave Hansen
2019-01-16 23:38       ` Jerome Glisse
2019-01-23 20:03         ` Dave Hansen
2019-01-23 20:15           ` Jerome Glisse [this message]
2019-01-18 19:58     ` Dave Hansen
2019-01-18 20:26       ` Jerome Glisse
2019-01-23 17:05   ` Michal Hocko
2019-01-16 18:19 ` [PATCH 3/4] dax/kmem: let walk_system_ram_range() search child resources Dave Hansen
2019-01-16 18:19 ` [PATCH 4/4] dax: "Hotplug" persistent memory for use like normal RAM Dave Hansen
2019-01-16 21:16   ` Bjorn Helgaas
2019-01-16 21:40     ` Dave Hansen
2019-01-16 21:44       ` Bjorn Helgaas
2019-01-16 22:06       ` Dan Williams
2019-01-16 21:53     ` Dave Hansen
2019-01-16 21:59       ` Bjorn Helgaas
2019-01-16 21:31   ` Dan Williams
2019-01-17  5:21   ` Du, Fan
2019-01-17 16:56     ` Dan Williams
2019-01-17  8:19   ` Yanmin Zhang
2019-01-17 15:17     ` Dave Hansen
2019-01-18  7:47       ` Yanmin Zhang
2019-01-18 15:20         ` Dave Hansen
2019-01-17 16:29 ` [PATCH 0/4] Allow persistent memory to be used " Jeff Moyer
2019-01-17 16:47   ` Keith Busch
2019-01-17 17:20     ` Jeff Moyer
2019-01-17 19:34       ` Keith Busch
2019-01-17 21:57         ` Jeff Moyer
2019-01-18 11:48       ` Fengguang Wu
2019-01-17 16:50   ` Dan Williams
2019-01-17 22:43   ` Dave Hansen

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