Hi, We have fscache deployed on several hosts and recently hit the bug below on a couple of hosts. We searched the mailing lists to see if it had been reported but did not find anything similar. We would appreciate any insight you might have into this problem. We are running the 3.9.11 + fscache-20130702 branch from dhowells git tree as referenced here https://www.redhat.com/archives/linux-cachefs/2013-July/msg00002.html. Thanks, Shantanu Goel Sep 6 17:22:37 kernel BUG at fs/fscache/cookie.c:547! Sep 6 17:22:37 invalid opcode: 0000 [#1] SMP Sep 6 17:22:37 Modules linked in: fuse cachefiles nfsv3 nfs_acl nfsv4 auth_rpcgss nfs fscache msr cpufreq_ondemand autofs4 lockd sunrpc binfmt_misc nls_iso8859_1 nls_cp437 vfat fat ext3 jbd dm_multipath scsi_dh raid0 acpi_pad acpi_ipmi ipmi_msghandler acpi_i2c nvram kvm_intel kvm sg sr_mod cdrom iTCO_wdt iTCO_vendor_support acpi_power_meter bnx2 hwmon pcspkr lpc_ich ehci_pci m fd_core i7core_edac i2c_i801 tpm_tis tpm acpi_cpufreq freq_table hid_generic i2c_core tpm_bios mperf dm_snapshot dm_zero dm_mirror dm_region_hash dm_log dm_mod usb_storage ata_piix libata mp tsas mptscsih mptbase scsi_transport_sas sd_mod scsi_mod crc_t10dif raid1 ext4 jbd2 mbcache crc16 uhci_hcd ohci_hcd ehci_hcd [last unloaded: microcode] Sep 6 17:22:37 CPU 4 Sep 6 17:22:37 Pid: 5875, comm: umount.nfs Not tainted 3.9.11-el5.ia32e.lime.0 #1 Cisco Systems Inc R250-2480805W/R250-2480805W Sep 6 17:22:37 RIP: 0010:[<ffffffffa041387e>] [<ffffffffa041387e>] __fscache_cookie_put+0x4e/0x60 [fscache] Sep 6 17:22:37 RSP: 0018:ffff88011b18fe08 EFLAGS: 00010282 Sep 6 17:22:37 RAX: 0000000000000001 RBX: ffff880906291410 RCX: 00000000ffffffff Sep 6 17:22:37 RDX: 0000000000000001 RSI: ffff88090d407780 RDI: ffff88090d407780 Sep 6 17:22:37 RBP: ffff88011b18fe18 R08: ffff88084fc92a40 R09: 0000000000000080 Sep 6 17:22:37 R10: 0000000000012a40 R11: 0000000000000400 R12: 0000000000000000 Sep 6 17:22:37 R13: ffff88038e6ec400 R14: ffff88038e6ec400 R15: 0000000000000000 Sep 6 17:22:37 FS: 00007f16884346e0(0000) GS:ffff88084fc80000(0000) knlGS:0000000000000000 Sep 6 17:22:37 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b Sep 6 17:22:37 CR2: ffffffffff600000 CR3: 0000000d81116000 CR4: 00000000000007e0 Sep 6 17:22:37 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Sep 6 17:22:37 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Sep 6 17:22:37 Process umount.nfs (pid: 5875, threadinfo ffff88011b18e000, task ffff88013915c830) Sep 6 17:22:37 Stack: Sep 6 17:22:37 ffff88090d407780 ffff88090d407780 ffff88011b18fe38 ffffffffa0413dd9 Sep 6 17:22:37 ffff880205355800 ffff880205355800 ffff88011b18fe58 ffffffffa043c461 Sep 6 17:22:37 ffff88028f709420 ffff88038e6ec400 ffff88011b18fe78 ffffffffa042f8fd Sep 6 17:22:37 Call Trace: Sep 6 17:22:37 [<ffffffffa0413dd9>] __fscache_relinquish_cookie+0x109/0x260 [fscache] Sep 6 17:22:37 [<ffffffffa043c461>] nfs_fscache_release_super_cookie+0x31/0xb0 [nfs] Sep 6 17:22:37 [<ffffffffa042f8fd>] nfs_kill_super+0x2d/0x40 [nfs] Sep 6 17:22:37 [<ffffffff81157345>] deactivate_locked_super+0x45/0x70 Sep 6 17:22:37 [<ffffffff81157fba>] deactivate_super+0x4a/0x70 Sep 6 17:22:37 [<ffffffff81173118>] mntput_no_expire+0xf8/0x150 Sep 6 17:22:37 [<ffffffff8117405f>] sys_umount+0xcf/0x3f0 Sep 6 17:22:37 [<ffffffff8141f3c2>] system_call_fastpath+0x16/0x1b Sep 6 17:22:37 Code: 48 8b 3d 06 8d 00 00 e8 11 c9 d2 e0 48 85 db 74 13 8b 03 85 c0 7e 18 f0 ff 0b 0f 94 c0 48 89 de 84 c0 75 d1 48 83 c4 08 5b c9 c3 <0f> 0b eb fe 0f 0b eb fe 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 Sep 6 17:22:37 RIP [<ffffffffa041387e>] __fscache_cookie_put+0x4e/0x60 [fscache] Sep 6 17:22:37 RSP <ffff88011b18fe08> Sep 6 17:22:37 ---[ end trace 09b0e943b803d0fb ]--- -- Linux-cachefs mailing list Linux-cachefs@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cachefs
