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From: <dan.j.williams@intel.com>
To: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>,
	<linux-cxl@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<nvdimm@lists.linux.dev>, <linux-fsdevel@vger.kernel.org>,
	<linux-pm@vger.kernel.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>,
	Jonathan Cameron <jonathan.cameron@huawei.com>,
	Dave Jiang <dave.jiang@intel.com>,
	"Alison Schofield" <alison.schofield@intel.com>,
	Vishal Verma <vishal.l.verma@intel.com>,
	Ira Weiny <ira.weiny@intel.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Matthew Wilcox <willy@infradead.org>, Jan Kara <jack@suse.cz>,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	Len Brown <len.brown@intel.com>, Pavel Machek <pavel@kernel.org>,
	Li Ming <ming.li@zohomail.com>,
	Jeff Johnson <jeff.johnson@oss.qualcomm.com>,
	"Ying Huang" <huang.ying.caritas@gmail.com>,
	Yao Xingtao <yaoxt.fnst@fujitsu.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Greg KH <gregkh@linuxfoundation.org>,
	Nathan Fontenot <nathan.fontenot@amd.com>,
	Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>,
	Terry Bowman <terry.bowman@amd.com>,
	Robert Richter <rrichter@amd.com>,
	Benjamin Cheatham <benjamin.cheatham@amd.com>,
	PradeepVineshReddy Kodamati <PradeepVineshReddy.Kodamati@amd.com>,
	Zhijian Li <lizhijian@fujitsu.com>, <ardb@kernel.org>,
	<bp@alien8.de>
Subject: Re: [PATCH 1/6] dax/hmem, e820, resource: Defer Soft Reserved registration until hmem is ready
Date: Mon, 8 Sep 2025 16:01:17 -0700	[thread overview]
Message-ID: <68bf603dee8ff_75e31001d@dwillia2-mobl4.notmuch> (raw)
In-Reply-To: <20250822034202.26896-2-Smita.KoralahalliChannabasappa@amd.com>

[ add Boris and Ard ]

Ard, Boris, can you have a look at the touches to early e820/x86 init
(insert_resource_late()) and give an ack (or nak). The general problem
here is conflicts between e820 memory resources and CXL subsystem memory
resources.

Smita Koralahalli wrote:
> Insert Soft Reserved memory into a dedicated soft_reserve_resource tree
> instead of the iomem_resource tree at boot.
> 
> Publishing Soft Reserved ranges into iomem too early causes conflicts with
> CXL hotplug and region assembly failure, especially when Soft Reserved
> overlaps CXL regions.
> 
> Re-inserting these ranges into iomem will be handled in follow-up patches,
> after ensuring CXL window publication ordering is stabilized and when the
> dax_hmem is ready to consume them.
> 
> This avoids trimming or deleting resources later and provides a cleaner
> handoff between EFI-defined memory and CXL resource management.
> 
> Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>


> Signed-off-by: Dan Williams <dan.j.williams@intel.com>

Smita, if you added changes this should have Co-developed-by. Otherwise
plain Signed-off-by is interpreted as only chain of custody.  Any other
patches that you add my Signed-off-by to should also have
Co-developed-by or be From: me.

Alternatively if you completely rewritel a patch with your own approach
then note the source (with a Link:) and leave off the original SOB.

Lastly, in this case it looks unmodified from what I wrote? Then it
should be:

From: Dan Williams <dan.j.williams@intel.com>

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>

...to show the chain of custody of you forwarding a diff authored
completely by someone else.

  parent reply	other threads:[~2025-09-08 23:01 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-08-22  3:41 [PATCH 0/6] dax/hmem, cxl: Coordinate Soft Reserved handling with CXL Smita Koralahalli
2025-08-22  3:41 ` [PATCH 1/6] dax/hmem, e820, resource: Defer Soft Reserved registration until hmem is ready Smita Koralahalli
2025-09-01  2:59   ` Zhijian Li (Fujitsu)
2025-09-30  4:01     ` Koralahalli Channabasappa, Smita
2025-09-08 23:01   ` dan.j.williams [this message]
2025-09-11 19:39     ` Koralahalli Channabasappa, Smita
2025-09-25 18:17       ` dan.j.williams
2025-09-09 16:12   ` Borislav Petkov
2025-09-30  4:56     ` Koralahalli Channabasappa, Smita
2025-12-18 17:52     ` dan.j.williams
2026-01-13 18:29       ` dan.j.williams
2025-08-22  3:41 ` [PATCH 2/6] dax/hmem: Request cxl_acpi and cxl_pci before walking Soft Reserved ranges Smita Koralahalli
2025-09-01  3:08   ` Zhijian Li (Fujitsu)
2025-09-04 17:35   ` Dave Jiang
2025-08-22  3:41 ` [PATCH 3/6] dax/hmem, cxl: Tighten dependencies on DEV_DAX_CXL and dax_hmem Smita Koralahalli
2025-09-01  3:28   ` Zhijian Li (Fujitsu)
2025-09-30  4:04     ` Koralahalli Channabasappa, Smita
2025-08-22  3:42 ` [PATCH 4/6] dax/hmem: Defer Soft Reserved overlap handling until CXL region assembly completes Smita Koralahalli
2025-09-01  4:01   ` Zhijian Li (Fujitsu)
2025-08-22  3:42 ` [PATCH 5/6] dax/hmem: Reintroduce Soft Reserved ranges back into the iomem tree Smita Koralahalli
2025-09-04 18:14   ` Dave Jiang
2025-09-10 13:41   ` Jonathan Cameron
2025-09-30  4:03     ` Koralahalli Channabasappa, Smita
2025-08-22  3:42 ` [RFC PATCH 6/6] cxl/region, dax/hmem: Guard CXL DAX region creation and tighten HMEM deps Smita Koralahalli
2025-09-01  6:21   ` Zhijian Li (Fujitsu)
2025-09-30  4:06     ` Koralahalli Channabasappa, Smita
2025-08-26 23:21 ` [PATCH 0/6] dax/hmem, cxl: Coordinate Soft Reserved handling with CXL Alison Schofield
2025-08-28 23:34   ` Koralahalli Channabasappa, Smita

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