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Date: Thu, 1 Dec 2022 18:48:12 -0800 From: Dan Williams <dan.j.williams@...el.com> To: <ira.weiny@...el.com>, Dan Williams <dan.j.williams@...el.com> CC: Ira Weiny <ira.weiny@...el.com>, Jonathan Cameron <Jonathan.Cameron@...wei.com>, Dave Jiang <dave.jiang@...el.com>, "Alison Schofield" <alison.schofield@...el.com>, Vishal Verma <vishal.l.verma@...el.com>, Ben Widawsky <bwidawsk@...nel.org>, "Steven Rostedt" <rostedt@...dmis.org>, Davidlohr Bueso <dave@...olabs.net>, <linux-kernel@...r.kernel.org>, <linux-cxl@...r.kernel.org> Subject: RE: [PATCH V2 04/11] cxl/mem: Clear events on driver load cxl/mem is cxl_mem.ko, This is cxl/pci. ira.weiny@ wrote: > From: Ira Weiny <ira.weiny@...el.com> > > The information contained in the events prior to the driver loading can > be queried at any time through other mailbox commands. > > Ensure a clean slate of events by reading and clearing the events. The > events are sent to the trace buffer but it is not anticipated to have > anyone listening to it at driver load time. This is easy to guarantee with modprobe policy, so I am not sure it is worth stating. This breakdown feels odd. I would split the trace event definitions into its own lead in patch since that is a pile of definitions that can be merged on their own. Then squash get, clear, and this patch into one patch as they don't have much reason to go in separately. > Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com> > Reviewed-by: Dave Jiang <dave.jiang@...el.com> > Signed-off-by: Ira Weiny <ira.weiny@...el.com> > --- > drivers/cxl/pci.c | 2 ++ > tools/testing/cxl/test/mem.c | 2 ++ > 2 files changed, 4 insertions(+) > > diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c > index 8f86f85d89c7..11e95a95195a 100644 > --- a/drivers/cxl/pci.c > +++ b/drivers/cxl/pci.c > @@ -521,6 +521,8 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) > if (IS_ERR(cxlmd)) > return PTR_ERR(cxlmd); > > + cxl_mem_get_event_records(cxlds); > + > if (resource_size(&cxlds->pmem_res) && IS_ENABLED(CONFIG_CXL_PMEM)) > rc = devm_cxl_add_nvdimm(&pdev->dev, cxlmd); > > diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c > index aa2df3a15051..e2f5445d24ff 100644 > --- a/tools/testing/cxl/test/mem.c > +++ b/tools/testing/cxl/test/mem.c > @@ -285,6 +285,8 @@ static int cxl_mock_mem_probe(struct platform_device *pdev) > if (IS_ERR(cxlmd)) > return PTR_ERR(cxlmd); > > + cxl_mem_get_event_records(cxlds); > + This hunk likely goes with the first patch that actually implements some mocked events. > if (resource_size(&cxlds->pmem_res) && IS_ENABLED(CONFIG_CXL_PMEM)) > rc = devm_cxl_add_nvdimm(dev, cxlmd); > > -- > 2.37.2 >
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