Not yet, this patch is still blocked by David. Regards, -Lei On 16 June 2018 at 01:49, Anthony DeRobertis <aderobertis@xxxxxxxxxxx> wrote: > On 02/22/2018 02:33 AM, carmark.dlut@xxxxxxxxx wrote: > >> From: Lei Xue <carmark.dlut@xxxxxxxxx> >> >> There is a potential race in fscache operation enqueuing for reading and >> copying multiple pages from cachefiles to netfs. >> Under some heavy load system, it will happen very often. >> > > Did anything happen with this patch? I still saw it with 4.16.12 (panic > below, captured via netconsole) when running ffmpeg with a source on a > cached NFSv3 share. (Actually an overlay on top of that cached NFS mount). > Applying this patch seems to have fixed the issue. > > The only weird thing I've noticed — not sure it's actually new from this > patch — is that midway through the encode, it stopped using the cached > version and started transferring it from the server again. But even so, > that's far better than a panic that takes out the machine (until the > watchdog forces a reset). > > ps: please cc me on replies, not subscribed to the mailing list. > > [51593.345396] FS-Cache: > [51593.345406] FS-Cache: Assertion failed > [51593.345409] FS-Cache: 0 > 0 is false > [51593.345421] ------------[ cut here ]------------ > [51593.345424] kernel BUG at /build/linux-43CEzF/linux-4.16 > .12/fs/fscache/operation.c:68! > [51593.345430] invalid opcode: 0000 [#1] SMP PTI > [51593.345433] Modules linked in: netconsole configfs ebtable_filter > ebtables devlink ip6table_filter ip6_tables iptable_filter overlay nfsv3 > nfs tun cachefiles fscache binfmt_misc snd_usb_audio snd_hda_codec_hdmi > snd_usbmidi_lib xts dm_crypt hid_generic usbhid snd_rawmidi snd_seq_device > hid pktcdvd snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel > snd_hda_codec bridge snd_hda_core stp llc intel_powerclamp snd_hwdep > kvm_intel kvm snd_pcm_oss mxm_wmi snd_mixer_oss snd_pcm snd_timer irqbypass > intel_cstate uhci_hcd intel_uncore r8169 pcspkr ehci_pci xhci_pci xhci_hcd > wmi snd ehci_hcd i2c_i801 firewire_ohci sr_mod soundcore usbcore > firewire_core crc_itu_t cdrom mii sg button asus_atk0110 lpc_ich shpchp > usb_common i5500_temp i7core_edac nvidia_drm(PO) drm_kms_helper drm > nvidia_modeset(PO) nvidia(PO) > [51593.345468] ipmi_devintf ipmi_msghandler nfsd coretemp auth_rpcgss > nfs_acl lockd grace sunrpc i2c_dev iTCO_wdt iTCO_vendor_support > acpi_cpufreq msr loop ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 > fscrypto ecb crypto_simd cryptd glue_helper aes_x86_64 dm_mod raid456 > libcrc32c crc32c_generic async_raid6_recov async_memcpy async_pq async_xor > xor async_tx raid6_pq raid0 multipath linear raid1 raid10 md_mod sd_mod > ahci libahci crc32c_intel evdev serio_raw libata scsi_mod > [51593.345493] CPU: 6 PID: 0 Comm: swapper/6 Tainted: P W IO > 4.16.0-2-amd64 #1 Debian 4.16.12-1 > [51593.345495] Hardware name: System manufacturer System Product > Name/SABERTOOTH X58, BIOS 1402 08/09/2012 > [51593.345502] RIP: 0010:fscache_enqueue_operation+0x106/0x150 [fscache] > [51593.345504] RSP: 0018:ffff91a767383c98 EFLAGS: 00010082 > [51593.345508] RAX: 0000000000000018 RBX: ffff91a7290d4d80 RCX: > 0000000000000006 > [51593.345510] RDX: 0000000000000000 RSI: 0000000000000086 RDI: > ffff91a767396730 > [51593.345512] RBP: ffff91a3359f8a20 R08: 000000000000043e R09: > 0000000000000000 > [51593.345515] R10: ffff91a767383c80 R11: 0000000000000001 R12: > ffff91a7290d4d80 > [51593.345517] R13: ffff91a7290d4e08 R14: ffff91a703575e20 R15: > ffff91a7290d4e08 > [51593.345520] FS: 0000000000000000(0000) GS:ffff91a767380000(0000) > knlGS:0000000000000000 > [51593.345522] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [51593.345524] CR2: 000055627b19b000 CR3: 000000015680a000 CR4: > 00000000000006e0 > [51593.345528] Call Trace: > [51593.345531] <IRQ> > [51593.345536] cachefiles_read_waiter+0xf8/0x150 [cachefiles] > [51593.345541] __wake_up_common+0x76/0x170 > [51593.345544] wake_up_page_bit+0xac/0x100 > [51593.345561] mpage_end_io+0x30/0x90 [ext4] > [51593.345568] clone_endio+0x8e/0x140 [dm_mod] > [51593.345572] raid_end_bio_io+0x2c/0xb0 [raid10] > [51593.345576] raid10_end_read_request+0x71/0x150 [raid10] > [51593.345581] blk_update_request+0x78/0x2b0 > [51593.345589] scsi_end_request+0x2c/0x1e0 [scsi_mod] > [51593.345597] scsi_io_completion+0x477/0x670 [scsi_mod] > [51593.345600] blk_done_softirq+0xa0/0xd0 > [51593.345605] __do_softirq+0xde/0x2b4 > [51593.345609] irq_exit+0xae/0xb0 > [51593.345612] do_IRQ+0x7d/0xc0 > [51593.345615] common_interrupt+0xf/0xf > [51593.345617] </IRQ> > [51593.345622] RIP: 0010:cpuidle_enter_state+0xa0/0x2b0 > [51593.345624] RSP: 0018:ffffb3f1431c7eb0 EFLAGS: 00000246 ORIG_RAX: > ffffffffffffffdc > [51593.345627] RAX: ffff91a7673a18c0 RBX: 00002eec8305e1d8 RCX: > 000000000000001f > [51593.345629] RDX: 00002eec8305e1d8 RSI: 000000002d9c529c RDI: > 0000000000000000 > [51593.345632] RBP: ffff91a7673a9948 R08: 0000000000000001 R09: > 0000000000000135 > [51593.345634] R10: ffffb3f1431c7e90 R11: 00000000000000a0 R12: > 0000000000000003 > [51593.345636] R13: ffffffff9cab2cd8 R14: 0000000000000000 R15: > 00002eec83032f50 > [51593.345641] do_idle+0x183/0x1e0 > [51593.345644] cpu_startup_entry+0x6f/0x80 > [51593.345649] start_secondary+0x1a4/0x1f0 > [51593.345652] secondary_startup_64+0xa5/0xb0 > [51593.345655] Code: 0b 48 c7 c7 63 d9 7d c1 e8 72 dd 2f da 48 c7 c7 71 d9 > 7d c1 e8 66 dd 2f da 48 63 73 44 31 d2 48 c7 c7 a0 ce 7d c1 e8 54 dd 2f da > <0f> 0b 48 c7 c7 63 d9 7d c1 e8 46 dd 2f da 48 c7 c7 71 d9 7d c1 > [51593.345682] RIP: fscache_enqueue_operation+0x106/0x150 [fscache] RSP: > ffff91a767383c98 > [51593.345688] ---[ end trace fe061122063cafae ]--- > [51593.345690] Kernel panic - not syncing: Fatal exception in interrupt > [51593.345782] Kernel Offset: 0x1aa00000 from 0xffffffff81000000 > (relocation range: 0xffffffff80000000-0xffffffffbfffffff) > [51593.345786] ---[ end Kernel panic - not syncing: Fatal exception in > interrupt > [51593.345793] WARNING: CPU: 6 PID: 0 at /build/linux-43CEzF/linux-4.16.12/kernel/sched/core.c:1190 > set_task_cpu+0x14d/0x160 > [51593.345795] Modules linked in: netconsole configfs ebtable_filter > ebtables devlink ip6table_filter ip6_tables iptable_filter overlay nfsv3 > nfs tun cachefiles fscache binfmt_misc snd_usb_audio snd_hda_codec_hdmi > snd_usbmidi_lib xts dm_crypt hid_generic usbhid snd_rawmidi snd_seq_device > hid pktcdvd snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel > snd_hda_codec bridge snd_hda_core stp llc intel_powerclamp snd_hwdep > kvm_intel kvm snd_pcm_oss mxm_wmi snd_mixer_oss snd_pcm snd_timer irqbypass > intel_cstate uhci_hcd intel_uncore r8169 pcspkr ehci_pci xhci_pci xhci_hcd > wmi snd ehci_hcd i2c_i801 firewire_ohci sr_mod soundcore usbcore > firewire_core crc_itu_t cdrom mii sg button asus_atk0110 lpc_ich shpchp > usb_common i5500_temp i7core_edac nvidia_drm(PO) drm_kms_helper drm > nvidia_modeset(PO) nvidia(PO) > [51593.345823] ipmi_devintf ipmi_msghandler nfsd coretemp auth_rpcgss > nfs_acl lockd grace sunrpc i2c_dev iTCO_wdt iTCO_vendor_support > acpi_cpufreq msr loop ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 > fscrypto ecb crypto_simd cryptd glue_helper aes_x86_64 dm_mod raid456 > libcrc32c crc32c_generic async_raid6_recov async_memcpy async_pq async_xor > xor async_tx raid6_pq raid0 multipath linear raid1 raid10 md_mod sd_mod > ahci libahci crc32c_intel evdev serio_raw libata scsi_mod > [51593.345844] CPU: 6 PID: 0 Comm: swapper/6 Tainted: P D W IO > 4.16.0-2-amd64 #1 Debian 4.16.12-1 > [51593.345846] Hardware name: System manufacturer System Product > Name/SABERTOOTH X58, BIOS 1402 08/09/2012 > [51593.345849] RIP: 0010:set_task_cpu+0x14d/0x160 > [51593.345851] RSP: 0018:ffff91a7673837f0 EFLAGS: 00010006 > [51593.345853] RAX: 0000000000000200 RBX: ffff91a74e31c380 RCX: > 0000000000000000 > [51593.345855] RDX: 0000000000000000 RSI: 0000000000000000 RDI: > ffff91a74e31c380 > [51593.345857] RBP: 0000000000000000 R08: 0000000000000000 R09: > 0000000000000006 > [51593.345859] R10: 0000000000000007 R11: 0000000000000000 R12: > 0000000000000000 > [51593.345861] R13: 0000000000000000 R14: 0000000000000046 R15: > 00000000000218c0 > [51593.345864] FS: 0000000000000000(0000) GS:ffff91a767380000(0000) > knlGS:0000000000000000 > [51593.345866] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [51593.345868] CR2: 000055627b19b000 CR3: 000000015680a000 CR4: > 00000000000006e0 > [51593.345870] Call Trace: > [51593.345872] <IRQ> > [51593.345875] try_to_wake_up+0x154/0x460 > [51593.345879] autoremove_wake_function+0x11/0x50 > [51593.345881] __wake_up_common+0x76/0x170 > [51593.345884] __wake_up_common_lock+0x7c/0xc0 > [51593.345888] irq_work_run_list+0x4d/0x70 > [51593.345891] smp_irq_work_interrupt+0x32/0xc0 > [51593.345894] irq_work_interrupt+0xf/0x20 > [51593.345898] RIP: 0010:panic+0x1fb/0x252 > [51593.345900] RSP: 0018:ffff91a767383a48 EFLAGS: 00000286 ORIG_RAX: > ffffffffffffff09 > [51593.345903] RAX: 0000000000000041 RBX: 0000000000000000 RCX: > 0000000000000006 > [51593.345905] RDX: 0000000000000000 RSI: 0000000000000082 RDI: > ffff91a767396730 > [51593.345908] RBP: ffff91a767383ac0 R08: 0000000000000472 R09: > 0000000000000000 > [51593.345910] R10: 0000000000000000 R11: 0000000000000001 R12: > 0000000000000000 > [51593.345912] R13: 0000000000000000 R14: ffffffff9c80922d R15: > 0000000000000004 > [51593.345915] ? irq_work_interrupt+0xa/0x20 > [51593.345919] ? panic+0x1f7/0x252 > [51593.345923] oops_end+0xac/0xc0 > [51593.345927] do_trap+0x132/0x140 > [51593.345930] do_error_trap+0x9d/0x120 > [51593.345934] ? fscache_enqueue_operation+0x106/0x150 [fscache] > [51593.345938] ? up+0x12/0x60 > [51593.345941] ? console_unlock+0x29d/0x550 > [51593.345944] invalid_op+0x1b/0x40 > [51593.345949] RIP: 0010:fscache_enqueue_operation+0x106/0x150 [fscache] > > -- Linux-cachefs mailing list Linux-cachefs@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cachefs
