Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752699AbXBKErN (ORCPT ); Sat, 10 Feb 2007 23:47:13 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752700AbXBKErN (ORCPT ); Sat, 10 Feb 2007 23:47:13 -0500 Received: from web36708.mail.mud.yahoo.com ([209.191.85.42]:47158 "HELO web36708.mail.mud.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752699AbXBKErL (ORCPT ); Sat, 10 Feb 2007 23:47:11 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:Date:From:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID; b=ND6WZ8PLwEI92eziWbU6oLp4cRPIOnaMe9HHMLhQLCnmN27VRBiOsEYkRtAy2X7WnjzjgEMQWCvnCMG56WCorqjaA1ofYjES9jCD7memVNOxs8eBxCmbndtTkL0l8nT5b/lZjb+XU+4TIFf2ZvAwx3NyO2P8lnR9dHICjEPnk5E=; X-YMail-OSG: ROigYcQVM1lPT1HeZn_eDh8s9cMJvauI011240umo_Djvog1feQLgwuqcXKq6C4D9nYKQymraxKIi857HmlP1wyqUljJuz4zij86E1Y5dsa05rKRspGWrzQ4dH2SSFc6LsdZOp4PNetFSmA- Date: Sat, 10 Feb 2007 20:47:10 -0800 (PST) From: Alex Dubov Subject: Re: Recent and not-so problems with tifm_sd driver To: Pierre Ossman Cc: linux-kernel@vger.kernel.org In-Reply-To: <45CCC72A.8020904@drzeus.cx> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Message-ID: <779217.2685.qm@web36708.mail.mud.yahoo.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5682 Lines: 102 > > This looks like the problem with races in mmc_block again. Add some printk:s in > the remove function so that you can see if this oops is after the remove > function (shouldn't be possible, but will cause crash if it is). It just occurred to me that my synopsis of the problem was utterly lame. Here, the correct description: When the card is pulled out, I mark the host as "ejected" (so it fast-fails all the requests), sleep a little for it to relax and then call mmc_remove_host. Otherwise, nasty things happen. Here's the example not involving mmc_block at all (command 3 failed, hardware timeout was missed, so software timeout picked it up; the sleep hack is disabled): Feb 11 02:26:08 mortug tifm_sd tifm_sd0:3: executing opcode 0x3, arg: 0x0, mask: 0x1140 Feb 11 02:26:09 mortug tifm_sd: card failed to respond for a long period of time< 7>tifm_7xx1 0000:06:09.3: checking media set 8 Feb 11 02:26:09 mortug tifm_7xx1: demand removing card from socket 0:3 Feb 11 02:26:09 mortug tifm_sd tifm_sd0:3: Setting bus width 0, power 0 Feb 11 02:26:09 mortug tifm_sd tifm_sd0:3: Setting bus width 0, power 0 Feb 11 02:26:09 mortug general protection fault: 0000 [1] SMP Feb 11 02:26:09 mortug CPU 0 Feb 11 02:26:09 mortug Modules linked in: tifm_sd tifm_7xx1 tifm_core mmc_block m mc_core appletalk ipx p8022 psnap llc p8023 fglrx(P) ndiswrapper snd_pcm_oss snd_ mixer_oss snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device eth 1394 binfmt_misc firmware_class tg3 ohci1394 yenta_socket rsrc_nonstatic ieee1394 pcmcia_core 8250_pci i2c_piix4 i2c_core snd_atiixp snd_atiixp_modem parport_pc p arport k8temp hwmon snd_ac97_codec ac97_bus joydev snd_pcm ehci_hcd serio_raw tsd ev pcspkr 8250_pnp 8250 serial_core snd_timer snd ohci_hcd evdev irda crc_ccitt s oundcore snd_page_alloc usbcore Feb 11 02:26:09 mortug Pid: 8318, comm: kmmcd Tainted: P 2.6.20 #1 Feb 11 02:26:09 mortug RIP: 0010:[] [] :mmc_ core:mmc_rescan+0x440/0x1350 Feb 11 02:26:09 mortug RSP: 0018:ffff81002d6d5af0 EFLAGS: 00010202 Feb 11 02:26:09 mortug RAX: 2f4065766f6d6572 RBX: 2f4065766f6d6572 RCX: 000000000 0000000 Feb 11 02:26:09 mortug RDX: ffff81002d6d5fd8 RSI: 0000000000000286 RDI: ffff81002 d6d5a88 Feb 11 02:26:09 mortug RBP: ffff81002d6d5dc8 R08: 0000000000000000 R09: 000000000 000000a Feb 11 02:26:09 mortug R10: 00000000ffffffff R11: ffffffff88178110 R12: ffff81002 976a000 Feb 11 02:26:09 mortug R13: ffff81002976a2c0 R14: ffff81002adee800 R15: ffff81002 d6d5dc0 Feb 11 02:26:09 mortug FS: 00002b8375adab00(0000) GS:ffffffff805d0000(0000) knlG S:00000000f7e066c0 Feb 11 02:26:09 mortug CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b Feb 11 02:26:09 mortug CR2: 000000000050e3c0 CR3: 00000000079a2000 CR4: 000000000 00006e0 Feb 11 02:26:09 mortug Process kmmcd (pid: 8318, threadinfo ffff81002d6d4000, tas k ffff81002ea82820) Feb 11 02:26:09 mortug Stack: ffffffff80288770 ffff81002d6d5dc8 ffff81002976a2ac ffff81002d6d5b28 Feb 11 02:26:09 mortug ffffffff80288a38 00000cc03f1dc6bb 0000000000962228 037ffe4 382562228 Feb 11 02:26:09 mortug 00ffffff80248e8b 00ff800000000001 00000000000004d0 0000000 000000001 Feb 11 02:26:09 mortug Call Trace: Feb 11 02:26:09 mortug [] task_rq_lock+0x50/0x90 Feb 11 02:26:09 mortug [] __activate_task+0x38/0x50 Feb 11 02:26:09 mortug [] unix_find_other+0x172/0x200 Feb 11 02:26:09 mortug [] __wake_up_common+0x40/0x70 Feb 11 02:26:09 mortug [] __alloc_pages+0x69/0x2f0 Feb 11 02:26:09 mortug [] do_wp_page+0x4b1/0x510 Feb 11 02:26:09 mortug [] thread_return+0x0/0xe2 Feb 11 02:26:09 mortug [] :mmc_core:mmc_wait_done+0x0/0x10 Feb 11 02:26:09 mortug [] :mmc_core:mmc_rescan+0x0/0x1350 Feb 11 02:26:09 mortug [] run_workqueue+0xb1/0x160 Feb 11 02:26:09 mortug [] keventd_create_kthread+0x0/0x90 Feb 11 02:26:09 mortug [] worker_thread+0x161/0x1a0 Feb 11 02:26:09 mortug [] default_wake_function+0x0/0x10 Feb 11 02:26:09 mortug [] default_wake_function+0x0/0x10 Feb 11 02:26:09 mortug [] worker_thread+0x0/0x1a0 Feb 11 02:26:09 mortug [] kthread+0xd9/0x120 Feb 11 02:26:09 mortug [] child_rip+0xa/0x12 Feb 11 02:26:09 mortug [] keventd_create_kthread+0x0/0x90 Feb 11 02:26:09 mortug [] kthread+0x0/0x120 Feb 11 02:26:09 mortug [] child_rip+0x0/0x12 Feb 11 02:26:09 mortug Feb 11 02:26:09 mortug Feb 11 02:26:09 mortug Code: 48 8b 03 0f 18 08 49 39 dd 0f 84 0c 04 00 00 f6 83 8 c 02 00 Feb 11 02:26:09 mortug RIP [] :mmc_core:mmc_rescan+0x440/0x135 0 Feb 11 02:26:09 mortug RSP Feb 11 02:28:09 mortug shutdown[17114]: shutting down for system halt Feb 11 02:28:09 mortug init: Switching to runlevel: 0 Feb 11 02:28:18 mortug dhcpcd[7461]: terminating on signal 15 Feb 11 02:28:21 mortug <6>ACPI: PCI interrupt for device 0000:00:14.5 disabled Feb 11 02:28:21 mortug ACPI: PCI interrupt for device 0000:00:14.6 disabled ____________________________________________________________________________________ Don't get soaked. 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