From: Jonathan Cameron <jonathan.cameron@huawei.com>
To: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>
Cc: <linux-cxl@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<nvdimm@lists.linux.dev>, <linux-fsdevel@vger.kernel.org>,
<linux-pm@vger.kernel.org>, Ard Biesheuvel <ardb@kernel.org>,
"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>,
Yazen Ghannam <yazen.ghannam@amd.com>,
"Dave Jiang" <dave.jiang@intel.com>,
Davidlohr Bueso <dave@stgolabs.net>,
"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 Kroah-Hartman <gregkh@linuxfoundation.org>,
Nathan Fontenot <nathan.fontenot@amd.com>,
Terry Bowman <terry.bowman@amd.com>,
Robert Richter <rrichter@amd.com>,
Benjamin Cheatham <benjamin.cheatham@amd.com>,
Zhijian Li <lizhijian@fujitsu.com>,
Borislav Petkov <bp@alien8.de>,
Tomasz Wolski <tomasz.wolski@fujitsu.com>
Subject: Re: [PATCH v6 4/9] dax/cxl, hmem: Initialize hmem early and defer dax_cxl binding
Date: Mon, 9 Mar 2026 14:31:38 +0000 [thread overview]
Message-ID: <20260309143138.000004c1@huawei.com> (raw)
In-Reply-To: <20260210064501.157591-5-Smita.KoralahalliChannabasappa@amd.com>
On Tue, 10 Feb 2026 06:44:56 +0000
Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com> wrote:
> From: Dan Williams <dan.j.williams@intel.com>
>
> Move hmem/ earlier in the dax Makefile so that hmem_init() runs before
> dax_cxl.
>
> In addition, defer registration of the dax_cxl driver to a workqueue
> instead of using module_cxl_driver(). This ensures that dax_hmem has
> an opportunity to initialize and register its deferred callback and make
> ownership decisions before dax_cxl begins probing and claiming Soft
> Reserved ranges.
>
> Mark the dax_cxl driver as PROBE_PREFER_ASYNCHRONOUS so its probe runs
> out of line from other synchronous probing avoiding ordering
> dependencies while coordinating ownership decisions with dax_hmem.
>
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
> Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>
Bit of a hack but I don't have a better idea.
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
next prev parent reply other threads:[~2026-03-09 14:31 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-10 6:44 [PATCH v6 0/9] dax/hmem, cxl: Coordinate Soft Reserved handling with CXL and HMEM Smita Koralahalli
2026-02-10 6:44 ` [PATCH v6 1/9] dax/hmem: Request cxl_acpi and cxl_pci before walking Soft Reserved ranges Smita Koralahalli
2026-02-19 3:22 ` Alison Schofield
2026-02-10 6:44 ` [PATCH v6 2/9] dax/hmem: Gate Soft Reserved deferral on DEV_DAX_CXL Smita Koralahalli
2026-02-19 3:23 ` Alison Schofield
2026-02-10 6:44 ` [PATCH v6 3/9] cxl/region: Skip decoder reset on detach for autodiscovered regions Smita Koralahalli
2026-02-19 3:44 ` Alison Schofield
2026-02-20 20:35 ` Koralahalli Channabasappa, Smita
2026-03-11 21:37 ` Dan Williams
2026-03-12 19:53 ` Dan Williams
2026-03-12 21:28 ` Koralahalli Channabasappa, Smita
2026-03-13 12:54 ` Alejandro Lucero Palau
2026-03-17 2:14 ` Dan Williams
2026-03-18 7:33 ` Alejandro Lucero Palau
2026-03-18 21:49 ` Dave Jiang
2026-03-18 21:27 ` Alison Schofield
2026-03-24 14:06 ` Alejandro Lucero Palau
2026-03-24 19:46 ` Dan Williams
2026-03-24 22:23 ` Alejandro Lucero Palau
2026-03-25 1:51 ` Alison Schofield
2026-02-10 6:44 ` [PATCH v6 4/9] dax/cxl, hmem: Initialize hmem early and defer dax_cxl binding Smita Koralahalli
2026-02-18 15:54 ` Dave Jiang
2026-03-09 14:31 ` Jonathan Cameron [this message]
2026-02-10 6:44 ` [PATCH v6 5/9] dax: Track all dax_region allocations under a global resource tree Smita Koralahalli
2026-02-18 16:04 ` Dave Jiang
2026-03-09 14:37 ` Jonathan Cameron
2026-03-12 21:30 ` Koralahalli Channabasappa, Smita
2026-03-12 0:27 ` Dan Williams
2026-03-12 21:31 ` Koralahalli Channabasappa, Smita
2026-02-10 6:44 ` [PATCH v6 6/9] cxl/region: Add helper to check Soft Reserved containment by CXL regions Smita Koralahalli
2026-03-12 0:29 ` Dan Williams
2026-02-10 6:44 ` [PATCH v6 7/9] dax: Add deferred-work helpers for dax_hmem and dax_cxl coordination Smita Koralahalli
2026-02-18 17:52 ` Dave Jiang
2026-02-20 0:02 ` Koralahalli Channabasappa, Smita
2026-02-20 15:55 ` Dave Jiang
2026-03-09 14:49 ` Jonathan Cameron
2026-02-10 6:45 ` [PATCH v6 8/9] dax/hmem, cxl: Defer and resolve ownership of Soft Reserved memory ranges Smita Koralahalli
2026-02-13 14:47 ` [PATCH] " Gregory Price
2026-02-17 22:21 ` Koralahalli Channabasappa, Smita
2026-02-18 18:05 ` [PATCH v6 8/9] " Dave Jiang
2026-02-20 19:54 ` Koralahalli Channabasappa, Smita
2026-02-20 10:14 ` Alejandro Lucero Palau
2026-03-12 2:28 ` Dan Williams
2026-03-13 18:41 ` Koralahalli Channabasappa, Smita
2026-03-17 2:36 ` Dan Williams
2026-03-16 22:26 ` Koralahalli Channabasappa, Smita
2026-03-17 2:42 ` Dan Williams
2026-02-10 6:45 ` [PATCH v6 9/9] dax/hmem: Reintroduce Soft Reserved ranges back into the iomem tree Smita Koralahalli
2026-02-10 19:16 ` [PATCH v6 0/9] dax/hmem, cxl: Coordinate Soft Reserved handling with CXL and HMEM Alison Schofield
2026-02-10 19:49 ` Koralahalli Channabasappa, Smita
2026-02-12 6:38 ` Alison Schofield
2026-02-20 21:00 ` Koralahalli Channabasappa, Smita
2026-02-12 14:44 ` Tomasz Wolski
2026-02-12 21:18 ` Alison Schofield
2026-02-13 7:47 ` Yasunori Goto (Fujitsu)
2026-02-13 17:31 ` Alison Schofield
2026-02-16 5:15 ` Yasunori Goto (Fujitsu)
2026-02-12 20:02 ` [sos-linux-dev] " Koralahalli Channabasappa, Smita
2026-02-13 14:04 ` Gregory Price
2026-02-20 20:47 ` Koralahalli Channabasappa, Smita
2026-02-20 9:45 ` Tomasz Wolski
2026-02-20 21:19 ` Koralahalli Channabasappa, Smita
2026-02-22 23:17 ` Tomasz Wolski
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