From: Ira Weiny <ira.weiny@intel.com>
To: Michal Clapinski <mclapinski@google.com>,
Jonathan Corbet <corbet@lwn.net>,
Dan Williams <dan.j.williams@intel.com>,
Vishal Verma <vishal.l.verma@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Ira Weiny <ira.weiny@intel.com>, <nvdimm@lists.linux.dev>
Cc: "Paul E. McKenney" <paulmck@kernel.org>,
Thomas Huth <thuth@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Steven Rostedt <rostedt@goodmis.org>,
"Borislav Petkov (AMD)" <bp@alien8.de>,
Ard Biesheuvel <ardb@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Pasha Tatashin" <pasha.tatashin@soleen.com>,
Mike Rapoport <rppt@kernel.org>, <linux-doc@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-cxl@vger.kernel.org>,
Michal Clapinski <mclapinski@google.com>
Subject: Re: [PATCH v3 0/2] libnvdimm/e820: Add a new parameter to configure many regions per e820 entry
Date: Wed, 25 Jun 2025 16:17:06 -0500 [thread overview]
Message-ID: <685c67525ba79_2c35442945@iweiny-mobl.notmuch> (raw)
In-Reply-To: <20250612114210.2786075-1-mclapinski@google.com>
Michal Clapinski wrote:
> This includes:
> 1. Splitting one e820 entry into many regions.
> 2. Conversion to devdax during boot.
>
> This change is needed for the hypervisor live update. VMs' memory will
> be backed by those emulated pmem devices. To support various VM shapes
> I want to create devdax devices at 1GB granularity similar to hugetlb.
> Also detecting those devices as devdax during boot speeds up the whole
> process. Conversion in userspace would be much slower which is
> unacceptable while trying to minimize
Did you explore the NFIT injection strategy which Dan suggested?[1]
[1] https://lore.kernel.org/all/6807f0bfbe589_71fe2944d@dwillia2-xfh.jf.intel.com.notmuch/
If so why did it not work?
Ira
[snip]
next prev parent reply other threads:[~2025-06-25 21:16 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-12 11:42 [PATCH v3 0/2] libnvdimm/e820: Add a new parameter to configure many regions per e820 entry Michal Clapinski
2025-06-12 11:42 ` [PATCH v3 1/2] libnvdimm/e820: Add a new parameter to split e820 entry into many regions Michal Clapinski
2025-06-12 11:42 ` [PATCH v3 2/2] libnvdimm: add nd_e820.pmem automatic devdax conversion Michal Clapinski
2025-06-23 10:00 ` kernel test robot
2025-06-25 21:17 ` Ira Weiny [this message]
2025-07-01 12:05 ` [PATCH v3 0/2] libnvdimm/e820: Add a new parameter to configure many regions per e820 entry Michał Cłapiński
2025-08-14 13:27 ` Michał Cłapiński
2025-08-29 0:49 ` Ira Weiny
2025-08-29 2:40 ` Pasha Tatashin
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