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Message-ID: <3b6441b8-06e6-45da-9e55-f92f2c86933e@ufal.mff.cuni.cz>
Date: Tue, 13 Aug 2024 07:49:34 +0200
From: Jonáš Vidra <vidra@...l.mff.cuni.cz>
To: Kolbjørn Barmen <linux-ppc@...la.no>
Cc: <linuxppc-dev@...ts.ozlabs.org>,
<linux-kernel@...r.kernel.org>,
<linux-ide@...r.kernel.org>,
<mpe@...erman.id.au>,
<cassel@...nel.org>,
<linux@...ck-us.net>
Subject: Re: Since 6.10 - kernel oops/panics on G4 macmini due to change in drivers/ata/pata_macio.c
On Tue 13. Aug 2024 0:32:37 CEST, Kolbjørn Barmen wrote:
> Ever since 6.10, my macmini G4 behaved unstable when dealing with lots of
> I/O activity, such as sync'ing of Gentoo portage tree, unpacking kernel
> source tarball, building large software packages (or kernel) etc.
>
> After a bit of testing, and patient kernel rebuilding (while crashing) I
> found the cuplit to be this commit/change
>
> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/diff/?id=09fe2bfa6b83f865126ce3964744863f69a4a030
I've been able to reproduce this pata_macio bug on a desktop PowerMac G4
with the 6.10.3 kernel version. Reverting the linked change
("ata: pata_macio: Fix max_segment_size with PAGE_SIZE == 64K") makes
the errors go away.
CCing linux-ide and the authors of that patch; I hope this is OK with
you guys.
> Exampe of what a opps/panic looks like (and they all look very much alike)
>
> https://share.icloud.com/photos/042BHRkrXqPO-fllvpxMFl2CA
Textual form for easier searching:
------------[ cut here ]------------
kernel BUG at drivers/ata/pata_macio.c:544!
Oops: Exception in kernel mode, sig: 5 [#1]
BE PAGE_SIZE=4K MMU=Hash SMP NR_CPUS=2 DEBUG_PAGEALLOC PowerMac
Modules linked in: ipv6 binfmt_misc b43 mac80211 radeon libarc4 cfg80211
snd_aoa_codec_tas snd_aoa_fabric_layout snd_aoa rfkill snd_aoa_i2sbus hwmon
drm_suballoc_helper snd_aoa_soundbus i2c_algo_bit snd_pcm backlight
drm_ttm_helper ttm xhci_pci pmac_zilog therm_windtunnel xhci_hcd
drm_display_helper firewire_ohci snd_timer snd firewire_core serial_base
ssb soundcore crc_itu_t
CPU: 1 PID: 1870 Comm: kworker/u10:4 Tainted: G T
6.10.3-gentoo #1
Hardware name: PowerMac3,6 7455 0x80010303 PowerMac
Workqueue: btrfs-worker btrfs_work_helper
NIP: c0719670 LR: c0719678 CTR: 00000001
REGS: f2db9bf0 TRAP: 0700 Tainted: G T (6.10.3-gentoo)
MSR: 00021032 <ME,IR,DR,RI> CR: 44008408 XER: 20000000
GPR00: c06fc28c f2db9cb0 c10d8020 c12d28cc 00000000 00000000 00000000
c109cff4
GPR08: 69fd0000 00000100 00010000 00000000 00000000 00000000 c007801c
c40c1980
GPR16: 00000000 00000000 00000000 00000000 00000000 00000100 00000122
c11377c8
GPR24: 000000ff 00000008 0000ff00 00000000 c14200a8 00000101 00000000
c109d000
NIP [c0719670] pata_macio_qc_prep+0xf4/0x190
LR [c0719678] pata_macio_qc_prep+0xfc/0x190
Call Trace:
[f2db9cb0] [c1421660] 0xc1421660 (unreliable)
[f2db9ce0] [c06fc28c] ata_qc_issue+0x14c/0x2d4
[f2db9d00] [c0707c5c] __ata_scsi_queuecmd+0x200/0x53c
[f2db9d20] [c0707fe8] ata_scsi_queuecmd+0x50/0xe0
[f2db9d40] [c06e2644] scsi_queue_rq+0x788/0xb1c
[f2db9d80] [c0492464] __blk_mq_issue_directly+0x58/0xf4
[f2db9db0] [c0497828] blk_mq_plug_issue_direct+0x8c/0x1b4
[f2db9de0] [c0498074] blk_mq_flush_plug_list.part.0+0x584/0x5e0
[f2db9e30] [c0485a40] __blk_flush_plug+0xf8/0x194
[f2db9e70] [c0485f88] __submit_bio+0x1b8/0x2e0
[f2db9ec0] [c04862e0] submit_bio_noacct_nocheck+0x230/0x304
[f2db9f00] [c03aaf30] btrfs_work_helper+0x200/0x338
[f2db9f40] [c006cae0] process_one_work+0x1a8/0x338
[f2db9f70] [c006d79c] worker_thread+0x364/0x4c0
[f2db9fc0] [c007811c] kthread+0x100/0x104
[f2db9ff0] [c001b304] start_kernel_thread+0x10/0x14
Code: 38ff0004 b37f0002 7d20ff2c 3bff0010 7d003d2c 7d084a14 93dffff8
b3dffffe b3dffffc 41820010 3bbd0001 4200ffc0 <0fe00000> 4bdcbb01 813c0044
3b180001
---[ end trace 0000000000000000 ]---
note: kworker/u10:4[1870] exited with irqs disabled
------------[ cut here ]------------
WARNING: CPU: 1 PID: 1870 at kernel/exit.c:825 do_exit+0x854/0x9ec
Modules linked in: ipv6 binfmt_misc b43 mac80211 radeon libarc4 cfg80211
snd_aoa_codec_tas snd_aoa_fabric_layout snd_aoa rfkill snd_aoa_i2sbus hwmon
drm_suballoc_helper snd_aoa_soundbus i2c_algo_bit snd_pcm backlight
drm_ttm_helper ttm xhci_pci pmac_zilog therm_windtunnel xhci_hcd
drm_display_helper firewire_ohci snd_timer snd firewire_core serial_base
ssb soundcore crc_itu_t
CPU: 1 PID: 1870 Comm: kworker/u10:4 Tainted: G D T
6.10.3-gentoo #1
Hardware name: PowerMac3,6 7455 0x80010303 PowerMac
Workqueue: btrfs-worker btrfs_work_helper
NIP: c004f09c LR: c004e8a4 CTR: 00000000
REGS: f2db9a80 TRAP: 0700 Tainted: G D T (6.10.3-gentoo)
MSR: 00029032 <EE,ME,IR,DR,RI> CR: 88db92e2 XER: 00000000
GPR00: c004f2c4 f2db9b40 c10d8020 00000000 00002710 00000000 00000000
00000000
GPR08: 00000000 f2db9e88 00000004 00000000 28db92e2 00000000 c007801c
c40c1980
GPR16: 00000000 00000000 00000000 00000000 00000000 00000100 00000122
c11377c8
GPR24: 000000ff c0db0000 00001032 c0a21000 c138d520 00000005 c10d8020
c1447220
NIP [c004f09c] do_exit+0x854/0x9ec
LR [c004e8a4] do_exit+0x5c/0x9ec
Call Trace:
[f2db9b40] [c00b0c38] _printk+0x78/0xc4 (unreliable)
[f2db9b90] [c004f2c4] make_task_dead+0x90/0x174
[f2db9bb0] [c0010b9c] die+0x324/0x32c
[f2db9be0] [c0004828] ProgramCheck_virt+0x108/0x158
--- interrupt: 700 at pata_macio_qc_prep+0xf4/0x190
NIP: c0719670 LR: c0719678 CTR: 00000001
REGS: f2db9bf0 TRAP: 0700 Tainted: G D T (6.10.3-gentoo)
MSR: 00021032 <ME,IR,DR,RI> CR: 44008408 XER: 20000000
GPR00: c06fc28c f2db9cb0 c10d8020 c12d28cc 00000000 00000000 00000000
c109cff4
GPR08: 69fd0000 00000100 00010000 00000000 00000000 00000000 c007801c
c40c1980
GPR16: 00000000 00000000 00000000 00000000 00000000 00000100 00000122
c11377c8
GPR24: 000000ff 00000008 0000ff00 00000000 c14200a8 00000101 00000000
c109d000
NIP [c0719670] pata_macio_qc_prep+0xf4/0x190
LR [c0719678] pata_macio_qc_prep+0xfc/0x190
--- interrupt: 700
[f2db9cb0] [c1421660] 0xc1421660 (unreliable)
[f2db9ce0] [c06fc28c] ata_qc_issue+0x14c/0x2d4
[f2db9d00] [c0707c5c] __ata_scsi_queuecmd+0x200/0x53c
[f2db9d20] [c0707fe8] ata_scsi_queuecmd+0x50/0xe0
[f2db9d40] [c06e2644] scsi_queue_rq+0x788/0xb1c
[f2db9d80] [c0492464] __blk_mq_issue_directly+0x58/0xf4
[f2db9db0] [c0497828] blk_mq_plug_issue_direct+0x8c/0x1b4
[f2db9de0] [c0498074] blk_mq_flush_plug_list.part.0+0x584/0x5e0
[f2db9e30] [c0485a40] __blk_flush_plug+0xf8/0x194
[f2db9e70] [c0485f88] __submit_bio+0x1b8/0x2e0
[f2db9ec0] [c04862e0] submit_bio_noacct_nocheck+0x230/0x304
[f2db9f00] [c03aaf30] btrfs_work_helper+0x200/0x338
[f2db9f40] [c006cae0] process_one_work+0x1a8/0x338
[f2db9f70] [c006d79c] worker_thread+0x364/0x4c0
[f2db9fc0] [c007811c] kthread+0x100/0x104
[f2db9ff0] [c001b304] start_kernel_thread+0x10/0x14
Code: 915e02fc 81410014 912a0004 915e03c0 939e03c4 91210014 813e04cc
4bfffcec 807e0370 38800000 4bffe195 4bfffc9c <0fe00000> 4bfff848 0fe00000
4bfff7ec
---[ end trace 0000000000000000 ]---
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