On 27/02/18 11:28, Adrian Hunter wrote: > On 26/02/18 23:48, Dmitry Osipenko wrote: >> But still something is wrong... I've been getting occasional EXT4 Ooops's, like >> the one below, and __wait_on_bit() is always figuring in the stacktrace. It >> never happened with blk-mq disabled, though it could be a coincidence and >> actually unrelated to blk-mq patches. > > I can't think how an IO driver could cause that. > > cc'ing ext4 mailing list for more advice. + Ted and Andreas > >> >> >> [ 6625.992337] Unable to handle kernel NULL pointer dereference at virtual >> address 0000001c >> [ 6625.993004] pgd = 00b30c03 >> [ 6625.993257] [0000001c] *pgd=00000000 >> [ 6625.993594] Internal error: Oops: 5 [#1] PREEMPT SMP ARM >> [ 6625.994022] Modules linked in: >> [ 6625.994326] CPU: 1 PID: 19355 Comm: dpkg Not tainted >> 4.16.0-rc2-next-20180220-00095-ge9c9f5689a84-dirty #2090 >> [ 6625.995078] Hardware name: NVIDIA Tegra SoC (Flattened Device Tree) >> [ 6625.995595] PC is at dx_probe+0x68/0x684 >> [ 6625.995947] LR is at __wait_on_bit+0xac/0xc8 >> [ 6625.996307] pc : [<c033b960>] lr : [<c0bfbfd4>] psr: 800f0013 >> [ 6625.996806] sp : d55e3df0 ip : c0170e88 fp : d55e3e44 >> [ 6625.997227] r10: d55e3f4c r9 : d55e3e70 r8 : 00000000 >> [ 6625.997650] r7 : c4e13240 r6 : 00000000 r5 : d657db18 r4 : d55e3e8c >> [ 6625.998165] r3 : 0000007b r2 : d5830800 r1 : d5831000 r0 : c4e13240 >> [ 6625.998686] Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none >> [ 6625.999246] Control: 10c5387d Table: 0a63004a DAC: 00000051 >> [ 6625.999710] Process dpkg (pid: 19355, stack limit = 0x139a48b6) >> [ 6626.000184] Stack: (0xd55e3df0 to 0xd55e4000) >> [ 6626.000560] 3de0: 000002e9 d55e3e00 >> c0c01964 c0278c70 >> [ 6626.001209] 3e00: d55e3e24 014000c0 c04f3580 c0c01958 d55e3e90 801a001a >> d55e3e3c 00000012 >> [ 6626.001854] 3e20: d5830800 00000000 d657db18 c24b0000 d55e3e70 d55e3f4c >> d55e3edc d55e3e48 >> [ 6626.002502] 3e40: c033d568 c033b904 00000000 600f0013 c029e640 d6cf3540 >> ffffe000 00000000 >> [ 6626.003150] 3e60: 00076e99 d55e3ef4 d55e3e8c d5830800 d409c440 d409c454 >> 00000012 c029e640 >> [ 6626.003795] 3e80: d55e3ec4 d55e3e90 c02797b4 c4e13240 00000000 00000000 >> 00000000 00000000 >> [ 6626.004442] 3ea0: 00000000 00000000 00000000 00000000 d409c428 d409c428 >> d657db18 d409c428 >> [ 6626.005088] 3ec0: 00000000 c24b0000 ffffff9c d55e3f4c d55e3f14 d55e3ee0 >> c033d7b0 c033d1b8 >> [ 6626.005732] 3ee0: c0c01964 c0180050 d55e3f14 d55e3ef8 c029e870 00000000 >> d409c428 d6546558 >> [ 6626.006382] 3f00: d55e3f58 00000000 d55e3f34 d55e3f18 c0291f04 c033d764 >> 00000000 00000001 >> [ 6626.007032] 3f20: 00000000 d55e3f58 d55e3f94 d55e3f38 c0293d70 c0291ea0 >> d55e3f58 d55e3f4c >> [ 6626.007679] 3f40: 00000000 0090abb0 d5467800 00000000 d6dd0110 d6546558 >> f3bc423c 00000012 >> [ 6626.008326] 3f60: c24b0019 80808080 00000000 015ce1b0 0090abb0 00d8d670 >> 00000028 c01011e4 >> [ 6626.008971] 3f80: d55e2000 00000000 d55e3fa4 d55e3f98 c0294544 c0293c44 >> 00000000 d55e3fa8 >> [ 6626.009620] 3fa0: c0101000 c0294530 015ce1b0 0090abb0 0090abb0 000002a8 >> 7d5a8800 7d5a8800 >> [ 6626.010264] 3fc0: 015ce1b0 0090abb0 00d8d670 00000028 0048eb80 00487344 >> 015eb160 004a6c10 >> [ 6626.010912] 3fe0: 004a6c8c bede3c0c 0048149d b6ecc6b8 600f0030 0090abb0 >> 00000000 00000000 >> [ 6626.011577] [<c033b960>] (dx_probe) from [<c033d568>] >> (ext4_find_entry+0x3bc/0x5ac) >> [ 6626.012198] [<c033d568>] (ext4_find_entry) from [<c033d7b0>] >> (ext4_lookup+0x58/0x1f4) >> [ 6626.012844] [<c033d7b0>] (ext4_lookup) from [<c0291f04>] >> (__lookup_hash+0x70/0x9c) >> [ 6626.013468] [<c0291f04>] (__lookup_hash) from [<c0293d70>] (do_rmdir+0x138/0x1b8) >> [ 6626.014071] [<c0293d70>] (do_rmdir) from [<c0294544>] (SyS_rmdir+0x20/0x24) >> [ 6626.014642] [<c0294544>] (SyS_rmdir) from [<c0101000>] >> (ret_fast_syscall+0x0/0x54) >> [ 6626.015231] Exception stack(0xd55e3fa8 to 0xd55e3ff0) >> [ 6626.015656] 3fa0: 015ce1b0 0090abb0 0090abb0 000002a8 >> 7d5a8800 7d5a8800 >> [ 6626.016302] 3fc0: 015ce1b0 0090abb0 00d8d670 00000028 0048eb80 00487344 >> 015eb160 004a6c10 >> [ 6626.035930] 3fe0: 004a6c8c bede3c0c 0048149d b6ecc6b8 >> [ 6626.055341] Code: e1a07000 e5840000 8a000078 e590601c (e5d6301c) >> [ 6626.075632] ---[ end trace 034f3552437a92bc ]--- >> > > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
