From: "Huang, Ying" <ying.huang@linux.alibaba.com>
To: Dan Williams <dan.j.williams@intel.com>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
Davidlohr Bueso <dave@stgolabs.net>, <dave.jiang@intel.com>,
<alison.schofield@intel.com>, <ira.weiny@intel.com>,
<vishal.l.verma@intel.com>, <seven.yi.lee@gmail.com>,
<hch@infradead.org>, <a.manzanares@samsung.com>,
<fan.ni@samsung.com>
Cc: <linux-cxl@vger.kernel.org>
Subject: Deep flush support for CXL pmem?
Date: Fri, 17 Oct 2025 14:11:16 +0800 [thread overview]
Message-ID: <87zf9qf46z.fsf@DESKTOP-5N7EMDA> (raw)
Hi, All,
When reading the documentation of PMDK (https://github.com/pmem/pmdk), I
found that deep flush is used for data loss recovery in addition to GPF.
With that, we can identify that a file isn't affected by the GPF failure
because it wasn't opened during the GPF failure.
However, IIUC, the Linux kernel doesn't support deep flush (via
nvdimm_flush()) for CXL pmem at least for now. For NVDIMM, we have WPQ,
but it appears that we don't have that for CXL. Is deep flush for CXL
defined in some spec?
---
Best Regards,
Huang, Ying
next reply other threads:[~2025-10-17 6:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-17 6:11 Huang, Ying [this message]
2025-10-17 14:25 ` Deep flush support for CXL pmem? Gregory Price
2025-10-17 17:00 ` Jonathan Cameron
2025-10-17 19:10 ` dan.j.williams
2025-10-20 2:38 ` Davidlohr Bueso
2025-10-20 11:14 ` Huang, Ying
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