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From:   Jeff Moyer <jmoyer@redhat.com>
To:     Christoph Hellwig <hch@lst.de>
Cc:     Dan Williams <dan.j.williams@intel.com>,
        kernel test robot <oliver.sang@intel.com>,
        Jens Axboe <axboe@kernel.dk>,
        Oleksii Kurochko <olkuroch@cisco.com>,
        Ming Lei <ming.lei@redhat.com>, Hannes Reinecke <hare@suse.de>,
        LKML <linux-kernel@vger.kernel.org>, lkp@lists.01.org,
        lkp@intel.com, linux-nvdimm@lists.01.org
Subject: Re: [block]  52f019d43c: ndctl.test-libndctl.fail
References: <20210305055900.GC31481@xsang-OptiPlex-9020>
        <20210305074204.GA17414@lst.de>
Date:   Fri, 05 Mar 2021 09:38:19 -0500
In-Reply-To: <20210305074204.GA17414@lst.de> (Christoph Hellwig's message of
        "Fri, 5 Mar 2021 08:42:04 +0100")
Message-ID: <x49y2f1aco4.fsf@segfault.boston.devel.redhat.com>
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Christoph Hellwig <hch@lst.de> writes:

> Dan,
>
> can you make any sense of thos report?
>
> name='nfit_test'
> path='/lib/modules/5.11.0-rc5-00003-g52f019d43c22/extra/test/nfit_test.ko'
>> check_set_config_data: dimm: 0 read2 data miscompare: 0
>> check_set_config_data: dimm: 0x1 read2 data miscompare: 0
>> check_set_config_data: dimm: 0x100 read2 data miscompare: 0
>> check_set_config_data: dimm: 0x101 read2 data miscompare: 0
>> check_dax_autodetect: dax_ndns: 0x558a74d92f00 ndns: 0x558a74d92f00
>> check_dax_autodetect: dax_ndns: 0x558a74d91f40 ndns: 0x558a74d91f40
>> check_pfn_autodetect: pfn_ndns: 0x558a74d91f40 ndns: 0x558a74d91f40
>> check_pfn_autodetect: pfn_ndns: 0x558a74d8c5e0 ndns: 0x558a74d8c5e0
>> check_btt_autodetect: btt_ndns: 0x558a74d8c5e0 ndns: 0x558a74d8c5e0
>> check_btt_autodetect: btt_ndns: 0x558a74da1390 ndns: 0x558a74da1390
>> check_btt_autodetect: btt_ndns: 0x558a74d8c5e0 ndns: 0x558a74d8c5e0
>> check_btt_autodetect: btt_ndns: 0x558a74d91f40 ndns: 0x558a74d91f40
>> namespace7.0: failed to write /dev/pmem7
>> check_namespaces: namespace7.0 validate_bdev failed
>> ndctl-test1 failed: -6

This is from test/libndctl.c in the ndctl repo:

        fd = open(bdevpath, O_RDONLY);
        if (fd < 0) {
                fprintf(stderr, "%s: failed to open(%s, O_RDONLY)\n",
                                devname, bdevpath);
                return -ENXIO;
        }
...
        ro = 0;
        rc = ioctl(fd, BLKROSET, &ro);
        if (rc < 0) {
                fprintf(stderr, "%s: BLKROSET failed\n",
                                devname);
                rc = -errno;
                goto out;
        }

        close(fd);
        fd = open(bdevpath, O_RDWR|O_DIRECT);
...
        if (write(fd, buf, 4096) < 4096) {
                fprintf(stderr, "%s: failed to write %s\n",
                                devname, bdevpath);
                rc = -ENXIO;
                goto out;
        }

HTH,
Jeff