From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
To: Terry Bowman <terry.bowman@amd.com>
Cc: <dave@stgolabs.net>, <dave.jiang@intel.com>,
<alison.schofield@intel.com>, <vishal.l.verma@intel.com>,
<ira.weiny@intel.com>, <dan.j.williams@intel.com>,
<willy@infradead.org>, <jack@suse.cz>, <rafael@kernel.org>,
<len.brown@intel.com>, <pavel@ucw.cz>, <ming.li@zohomail.com>,
<nathan.fontenot@amd.com>,
<Smita.KoralahalliChannabasappa@amd.com>,
<huang.ying.caritas@gmail.com>, <yaoxt.fnst@fujitsu.com>,
<peterz@infradead.org>, <gregkh@linuxfoundation.org>,
<quic_jjohnson@quicinc.com>, <ilpo.jarvinen@linux.intel.com>,
<bhelgaas@google.com>, <andriy.shevchenko@linux.intel.com>,
<mika.westerberg@linux.intel.com>, <akpm@linux-foundation.org>,
<gourry@gourry.net>, <linux-cxl@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <nvdimm@lists.linux.dev>,
<linux-fsdevel@vger.kernel.org>, <linux-pm@vger.kernel.org>,
<rrichter@amd.com>, <benjamin.cheatham@amd.com>,
<PradeepVineshReddy.Kodamati@amd.com>, <lizhijian@fujitsu.com>
Subject: Re: [PATCH v3 4/4] cxl/dax: Delay consumption of SOFT RESERVE resources
Date: Fri, 4 Apr 2025 14:38:04 +0100 [thread overview]
Message-ID: <20250404143804.00005291@huawei.com> (raw)
In-Reply-To: <20250403183315.286710-5-terry.bowman@amd.com>
On Thu, 3 Apr 2025 13:33:15 -0500
Terry Bowman <terry.bowman@amd.com> wrote:
> From: Nathan Fontenot <nathan.fontenot@amd.com>
>
> The dax hmem device initialization will consume any iomem
> SOFT RESERVE resources prior to CXL region creation. To allow
> for the CXL driver to complete region creation and trim any
> SOFT RESERVE resources before the dax driver consumes them
> we need to delay the dax driver's search for SOFT RESERVEs.
>
> To do this the dax driver hmem device initialization code
> skips the walk of the iomem resource tree if the CXL ACPI
> driver is enabled. This allows the CXL driver to complete
> region creation and trim any SOFT RESERVES. Once the CXL
> driver completes this, the CXL driver then registers any
> remaining SOFT RESERVE resources with the dax hmem driver.
>
> Signed-off-by: Nathan Fontenot <nathan.fontenot@amd.com>
> Signed-off-by: Terry Bowman <terry.bowman@amd.com>
Looks fine to me, but I'm not feeling confident enough of
this area of the kernel to give a tag.
Jonathan
next prev parent reply other threads:[~2025-04-04 13:38 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-03 18:33 [PATCH v3 0/4] Add managed SOFT RESERVE resource handling Terry Bowman
2025-04-03 18:33 ` [PATCH v3 1/4] kernel/resource: Provide mem region release for SOFT RESERVES Terry Bowman
2025-04-03 18:40 ` Andy Shevchenko
2025-04-03 18:50 ` Bowman, Terry
2025-04-04 12:57 ` kernel test robot
2025-04-04 13:16 ` Jonathan Cameron
2025-04-04 13:25 ` Andy Shevchenko
2025-04-10 15:07 ` Bowman, Terry
2025-04-10 14:49 ` Bowman, Terry
2025-04-03 18:33 ` [PATCH v3 2/4] cxl: Update Soft Reserved resources upon region creation Terry Bowman
2025-04-04 13:32 ` Jonathan Cameron
2025-04-10 15:57 ` Bowman, Terry
2025-04-04 13:58 ` kernel test robot
2025-04-03 18:33 ` [PATCH v3 3/4] dax/mum: Save the dax mum platform device pointer Terry Bowman
2025-04-04 13:34 ` Jonathan Cameron
2025-04-10 18:27 ` Bowman, Terry
2025-04-03 18:33 ` [PATCH v3 4/4] cxl/dax: Delay consumption of SOFT RESERVE resources Terry Bowman
2025-04-04 13:38 ` Jonathan Cameron [this message]
2025-04-07 7:31 ` [PATCH v3 0/4] Add managed SOFT RESERVE resource handling Zhijian Li (Fujitsu)
2025-04-07 22:35 ` Bowman, Terry
2025-04-14 14:11 ` Bowman, Terry
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