Hi! I did: # echo readonly > /sys/<...>/cache0/state try to write but filesystem was readonly. Next I did: # echo active > /sys/<...>/cache0/state And I got: [ 1417.679079] bcache (181708b5-8f1d-4533-bad9-c3ebfea4db0c): required member dm-10 going RO, forcing fs RO [ 1417.764650] bcache (181708b5-8f1d-4533-bad9-c3ebfea4db0c): dm-10 read only [ 1504.428743] ------------[ cut here ]------------ [ 1504.428769] kernel BUG at drivers/md/bcache/super.c:1561! [ 1504.428777] invalid opcode: 0000 [#1] PREEMPT SMP [ 1504.428783] Modules linked in: bcache libcrc32c tun mousedev nouveau wmi video fbcon bitblit softcursor font backlight vboxnetadp(O) i2c_algo_bit ttm drm_kms_helper cfbfillrect vboxnetflt(O) syscopyarea cfbimgblt sysfillrect vboxdrv(O) sysimgblt fb_sys_fops snd_ens1371 snd_ac97_codec cfbcopyarea coretemp drm ac97_bus agpgart hwmon snd_rawmidi snd_pcm fb kvm_intel kvm snd_timer fbdev irqbypass e1000e psmouse snd soundcore evdev i2c_i801 ptp i82975x_edac acpi_cpufreq edac_core pps_core lpc_ich mfd_core 8250 processor 8250_base button serial_core zfs(PO) zunicode(PO) zcommon(PO) znvpair(PO) spl(O) zavl(PO) zlib_deflate sr_mod cdrom sata_sil [ 1504.428957] CPU: 0 PID: 31355 Comm: bash Tainted: P O 4.7.0-bcache+ #5 [ 1504.428964] Hardware name: /D975XBX, BIOS BX97510J.86A.1487.2007.0902.1724 09/02/2007 [ 1504.428972] task: ffff8800a09e8000 ti: ffff880016784000 task.ti: ffff880016784000 [ 1504.428979] RIP: 0010:[<ffffffffc0952f63>] [<ffffffffc0952f63>] __bch_cache_read_write+0xe3/0xf0 [bcache] [ 1504.429026] RSP: 0018:ffff880016787d30 EFLAGS: 00010202 [ 1504.429031] RAX: ffffffffc09706b0 RBX: ffff8800c820d000 RCX: 0000000000000000 [ 1504.429038] RDX: 0000000000000000 RSI: 0000000000000246 RDI: ffff8800c820d000 [ 1504.429044] RBP: ffff880016787d48 R08: ffff88014fc80000 R09: 00000000000003ea [ 1504.429050] R10: 00000000000003fa R11: 0000000000000000 R12: ffff88008bc80000 [ 1504.429056] R13: ffff8800c820d2e0 R14: ffff8800c785ac50 R15: ffff88008bc80000 [ 1504.429063] FS: 00007f7b45c31700(0000) GS:ffff88014fc00000(0000) knlGS:0000000000000000 [ 1504.429070] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1504.429076] CR2: 0000000000547bc0 CR3: 00000000cf167000 CR4: 00000000000006f0 [ 1504.429082] Stack: [ 1504.429086] ffffffffc0957831 ffffffffc0973ec0 0000000000000007 ffff880016787db8 [ 1504.429099] ffffffffc095a96d ffff8800c820d000 ffff880016787d01 0000000000000002 [ 1504.429110] ffff8800cfb79300 ffff88014a0a4aa0 ffff880149c51240 000000008ea8ec62 [ 1504.429123] Call Trace: [ 1504.429142] [<ffffffffc0957831>] ? bch_cache_read_write+0x51/0xa0 [bcache] [ 1504.429163] [<ffffffffc095a96d>] __bch_cache_store+0x5ad/0x650 [bcache] [ 1504.429183] [<ffffffffc095aa44>] bch_cache_store+0x34/0x50 [bcache] [ 1504.429192] [<ffffffff81206272>] sysfs_kf_write+0x32/0x40 [ 1504.429199] [<ffffffff812057f3>] kernfs_fop_write+0x113/0x190 [ 1504.429207] [<ffffffff8118e5c2>] __vfs_write+0x32/0x150 [ 1504.429215] [<ffffffff812e8a33>] ? __this_cpu_preempt_check+0x13/0x20 [ 1504.429223] [<ffffffff8109f201>] ? update_fast_ctr+0x41/0x70 [ 1504.429230] [<ffffffff8109f262>] ? percpu_down_read+0x12/0x50 [ 1504.429236] [<ffffffff8118f8c3>] vfs_write+0xb3/0x1b0 [ 1504.429243] [<ffffffff81190ce0>] SyS_write+0x50/0xc0 [ 1504.429249] [<ffffffff811adbde>] ? __close_fd+0x9e/0xc0 [ 1504.429257] [<ffffffff8157431f>] entry_SYSCALL_64_fastpath+0x17/0x93 [ 1504.429262] Code: 8b 03 48 85 c0 75 eb 65 ff 0d 4a 94 6b 3f 74 05 e9 4f ff ff ff e8 c6 f0 6a c0 e9 45 ff ff ff e8 bc f0 6a c0 31 c0 5b 41 5c 5d c3 <0f> 0b 90 66 2e 0f 1f 84 00 00 00 00 00 55 48 8b 87 90 00 00 00 [ 1504.429372] RIP [<ffffffffc0952f63>] __bch_cache_read_write+0xe3/0xf0 [bcache] [ 1504.429394] RSP <ffff880016787d30> [ 1504.432174] ---[ end trace 88c06790c8a7571e ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
