From: Ira Weiny <ira.weiny@intel.com>
To: Dan Williams <dan.j.williams@intel.com>, <dave.jiang@intel.com>
Cc: <patches@lists.linux.dev>, <linux-cxl@vger.kernel.org>,
<alison.schofield@intel.com>,
<Smita.KoralahalliChannabasappa@amd.com>
Subject: Re: [PATCH 6/9] dax/hmem: Fix singleton confusion between dax_hmem_work and hmem devices
Date: Tue, 31 Mar 2026 12:32:28 -0500 [thread overview]
Message-ID: <69cc052cc601b_17924f1003f@iweiny-mobl.notmuch> (raw)
In-Reply-To: <20260327052821.440749-7-dan.j.williams@intel.com>
Dan Williams wrote:
> dax_hmem (ab)uses a platform device to allow for a module to autoload in
> the presence of "Soft Reserved" resources. The dax_hmem driver had no
> dependencies on the "hmem_platform" device being a singleton until the
> recent "dax_hmem vs dax_cxl" takeover solution.
>
> Replace the layering violation of dax_hmem_work assuming that there will
> never be more than one "hmem_platform" device associated with a global work
> item with a dax_hmem local workqueue that can theoretically support any
> number of hmem_platform devices.
>
> Fixup the reference counting to only pin the device while it is live in the
> queue.
>
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
[snip]
next prev parent reply other threads:[~2026-03-31 17:28 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-27 5:28 [PATCH 0/9] dax/hmem: Add tests for the dax_hmem takeover capability Dan Williams
2026-03-27 5:28 ` [PATCH 1/9] cxl/region: Fix use-after-free from auto assembly failure Dan Williams
2026-03-27 16:28 ` Dave Jiang
2026-03-27 19:20 ` Alison Schofield
2026-03-27 21:54 ` Dan Williams
2026-03-27 22:37 ` Alison Schofield
2026-03-27 23:43 ` Alison Schofield
2026-03-30 20:24 ` Ira Weiny
2026-03-27 5:28 ` [PATCH 2/9] dax/cxl: Fix HMEM dependencies Dan Williams
2026-03-27 16:29 ` Dave Jiang
2026-03-27 23:44 ` Alison Schofield
2026-03-30 21:10 ` Ira Weiny
2026-03-27 5:28 ` [PATCH 3/9] cxl/region: Limit visibility of cxl_region_contains_resource() Dan Williams
2026-03-27 16:39 ` Dave Jiang
2026-03-27 23:45 ` Alison Schofield
2026-03-30 22:19 ` Ira Weiny
2026-03-27 5:28 ` [PATCH 4/9] cxl/region: Constify cxl_region_resource_contains() Dan Williams
2026-03-27 16:40 ` Dave Jiang
2026-03-27 23:45 ` Alison Schofield
2026-03-30 22:22 ` Ira Weiny
2026-03-27 5:28 ` [PATCH 5/9] dax/hmem: Reduce visibility of dax_cxl coordination symbols Dan Williams
2026-03-27 16:46 ` Dave Jiang
2026-03-27 23:46 ` Alison Schofield
2026-03-30 22:26 ` Ira Weiny
2026-03-27 5:28 ` [PATCH 6/9] dax/hmem: Fix singleton confusion between dax_hmem_work and hmem devices Dan Williams
2026-03-27 17:06 ` Dave Jiang
2026-03-27 23:46 ` Alison Schofield
2026-03-31 17:32 ` Ira Weiny [this message]
2026-03-27 5:28 ` [PATCH 7/9] dax/hmem: Parent dax_hmem devices Dan Williams
2026-03-27 17:07 ` Dave Jiang
2026-03-27 23:47 ` Alison Schofield
2026-03-31 17:42 ` Ira Weiny
2026-03-27 5:28 ` [PATCH 8/9] tools/testing/cxl: Simulate auto-assembly failure Dan Williams
2026-03-27 17:08 ` Dave Jiang
2026-03-27 23:48 ` Alison Schofield
2026-03-31 17:43 ` Ira Weiny
2026-03-27 5:28 ` [PATCH 9/9] tools/testing/cxl: Test dax_hmem takeover of CXL regions Dan Williams
2026-03-27 17:10 ` Dave Jiang
2026-03-27 23:58 ` Alison Schofield
2026-03-28 3:20 ` Dan Williams
2026-03-31 17:57 ` Ira Weiny
2026-03-31 18:13 ` Alison Schofield
2026-03-27 23:42 ` [PATCH 0/9] dax/hmem: Add tests for the dax_hmem takeover capability Alison Schofield
2026-03-30 21:12 ` Koralahalli Channabasappa, Smita
2026-03-30 21:17 ` Dave Jiang
2026-03-31 21:57 ` Dave Jiang
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