Messages in this thread | | | From | Rong Chen <> | Subject | Re: [lkp-robot] [mm] 15d36fecd0: WARNING:at_kernel/memremap.c:#devm_memremap_pages | Date | Thu, 30 Aug 2018 17:22:16 +0800 |
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On 08/24/2018 12:55 AM, Dave Jiang wrote: > I am not able to reproduce when I booted my test system with "mem=8G > memmap=4G!8G". I ended up with a single pmem: The issue seems to be related to specific machines, If you need any other debug log, please tell me.
Best Regards, Rong Chen
> [ 57.750556] nd_pmem namespace0.0: unable to guarantee persistence of > writes > [ 57.881573] pmem0: detected capacity change from 0 to 4294967296 > > However in the reported kmsg, it appears that memmap is splitting into 2 > namespaces rather than providing a single one, and the first region > ended up ending in the same section as start of the second region and > thus triggered the warning and having the second namespace rejected. > > kern :warn : [ 76.646531] nd_pmem namespace0.0: unable to guarantee > persistence of writes > kern :info : [ 76.661660] pmem0: detected capacity change from 0 to > 534773760 > kern :warn : [ 76.670129] nd_pmem namespace1.0: unable to guarantee > persistence of writes > kern :warn : [ 76.670290] ------------[ cut here ]------------ > kern :warn : [ 76.670372] nd_pmem namespace1.0: Conflicting mapping > in same section > > > On 08/22/2018 08:05 PM, kernel test robot wrote: >> FYI, we noticed the following commit (built with gcc-7): >> >> commit: 15d36fecd0bdc7510b70a0e5ec6671140b3fce0c ("mm: disallow mappings that conflict for devm_memremap_pages()") >> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master >> >> in testcase: ndctl >> with following parameters: >> >> >> >> >> on test machine: 4 threads Intel(R) Core(TM) i3-3220 CPU @ 3.30GHz with 8G memory >> >> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): >> >> >> +----------------+------------+------------+ >> | | 03758dbbe2 | 15d36fecd0 | >> +----------------+------------+------------+ >> | boot_successes | 4 | 4 | >> +----------------+------------+------------+ >> >> >> >> kern :warn : [ 76.670496] WARNING: CPU: 2 PID: 213 at kernel/memremap.c:188 devm_memremap_pages+0x9f/0x470 >> kern :warn : [ 76.670665] Modules linked in: nd_pmem(O+) dax_pmem(O) device_dax(O) nd_btt(O) x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec_idt kvm_intel snd_hda_codec_generic kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel cryptd nd_e820(O) pcspkr libnvdimm(O) ahci libahci nfit_test_iomap(O) libata snd_hda_intel i915 snd_hda_codec snd_hda_core snd_hwdep snd_pcm drm_kms_helper snd_timer syscopyarea sysfillrect sysimgblt fb_sys_fops snd soundcore drm video pcc_cpufreq ip_tables >> kern :warn : [ 76.671408] CPU: 2 PID: 213 Comm: systemd-udevd Tainted: G O 4.18.0-rc6-00155-g15d36fe #1 >> kern :warn : [ 76.671564] Hardware name: Hewlett-Packard p6-1451cx/2ADA, BIOS 8.15 02/05/2013 >> kern :warn : [ 76.671690] RIP: 0010:devm_memremap_pages+0x9f/0x470 >> kern :warn : [ 76.671774] Code: c6 74 78 49 8b 5f 50 48 85 db 75 04 49 8b 5f 10 4c 89 ff e8 13 77 42 00 48 89 da 48 89 c6 48 c7 c7 a8 62 0e 82 e8 51 8c eb ff <0f> 0b 49 8b be 80 00 00 00 65 ff 05 f1 59 e4 7e 48 8b 47 08 a8 03 >> kern :warn : [ 76.672107] RSP: 0018:ffffc9000125fad8 EFLAGS: 00010282 >> kern :warn : [ 76.672197] RAX: 0000000000000000 RBX: ffff8801a969e310 RCX: 0000000000000006 >> kern :warn : [ 76.672316] RDX: 0000000000000007 RSI: 0000000000000086 RDI: ffff8801ffd16950 >> kern :warn : [ 76.672434] RBP: ffff8801a98030a0 R08: 000000000000036e R09: 000000000000000a >> kern :warn : [ 76.672555] R10: 0000000000000000 R11: ffffffff82d6434d R12: 00000002ffffffff >> kern :warn : [ 76.672673] R13: 0000000000000000 R14: ffff8801a98024a0 R15: ffff8801aae09808 >> kern :warn : [ 76.672793] FS: 00007fae9129e8c0(0000) GS:ffff8801ffd00000(0000) knlGS:0000000000000000 >> kern :warn : [ 76.672929] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> kern :warn : [ 76.673026] CR2: 00007fae9127ec28 CR3: 00000001aafe8003 CR4: 00000000001606e0 >> kern :warn : [ 76.673145] Call Trace: >> kern :warn : [ 76.673199] ? devres_add+0x2f/0x40 >> kern :warn : [ 76.673266] pmem_attach_disk+0x542/0x6a0 [nd_pmem] >> kern :warn : [ 76.673354] ? kobject_release+0x69/0x1a0 >> kern :warn : [ 76.673431] ? nd_dax_probe+0xfc/0x120 [libnvdimm] >> kern :warn : [ 76.673520] nvdimm_bus_probe+0x69/0x150 [libnvdimm] >> kern :warn : [ 76.673608] driver_probe_device+0x2fa/0x470 >> kern :warn : [ 76.673685] __driver_attach+0xdc/0x100 >> kern :warn : [ 76.673753] ? driver_probe_device+0x470/0x470 >> kern :warn : [ 76.673831] bus_for_each_dev+0x76/0xc0 >> kern :warn : [ 76.673900] ? klist_add_tail+0x3b/0x70 >> kern :warn : [ 76.673968] bus_add_driver+0x161/0x260 >> kern :warn : [ 76.674035] ? 0xffffffffa0504000 >> kern :warn : [ 76.674096] driver_register+0x5b/0xe0 >> kern :warn : [ 76.674162] ? 0xffffffffa0504000 >> kern :warn : [ 76.674223] do_one_initcall+0x46/0x1e4 >> kern :warn : [ 76.674293] ? preempt_schedule_common+0x15/0x30 >> kern :warn : [ 76.674373] ? _cond_resched+0x22/0x30 >> kern :warn : [ 76.674442] ? kmem_cache_alloc_trace+0x3e/0x1e0 >> kern :warn : [ 76.674525] do_init_module+0x5b/0x203 >> kern :warn : [ 76.674593] load_module+0x1489/0x1b80 >> kern :warn : [ 76.674662] ? ima_post_read_file+0x102/0x110 >> kern :warn : [ 76.674741] ? __do_sys_finit_module+0xe9/0x110 >> kern :warn : [ 76.674820] __do_sys_finit_module+0xe9/0x110 >> kern :warn : [ 76.674901] do_syscall_64+0x5b/0x180 >> kern :warn : [ 76.674967] entry_SYSCALL_64_after_hwframe+0x44/0xa9 >> kern :warn : [ 76.675055] RIP: 0033:0x7fae9011b229 >> kern :warn : [ 76.675116] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 3f 4c 2b 00 f7 d8 64 89 01 48 >> kern :warn : [ 76.675449] RSP: 002b:00007ffeb0452908 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 >> kern :warn : [ 76.675576] RAX: ffffffffffffffda RBX: 0000557dd7cccdf0 RCX: 00007fae9011b229 >> kern :warn : [ 76.675696] RDX: 0000000000000000 RSI: 00007fae90a34265 RDI: 000000000000000f >> kern :warn : [ 76.675814] RBP: 00007fae90a34265 R08: 0000000000000000 R09: 00007ffeb0452e80 >> kern :warn : [ 76.675934] R10: 000000000000000f R11: 0000000000000246 R12: 0000000000000000 >> kern :warn : [ 76.676053] R13: 0000557dd7cde3c0 R14: 0000000000020000 R15: 0000557dd5d7dcbc >> kern :warn : [ 76.676175] ---[ end trace 72888cbe8943c229 ]--- >> >> >> To reproduce: >> >> git clonehttps://github.com/intel/lkp-tests.git >> cd lkp-tests >> bin/lkp install job.yaml # job file is attached in this email >> bin/lkp run job.yaml >> >> >> >> Thanks, >> lkp >>
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