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Message-ID: <20200518182304.a5epc75pyf37fqup@wittgenstein>
Date: Mon, 18 May 2020 20:23:04 +0200
From: Christian Brauner <christian.brauner@...ntu.com>
To: Al Viro <viro@...iv.linux.org.uk>
Cc: Mark Cave-Ayland <mark.cave-ayland@...nde.co.uk>,
David Miller <davem@...emloft.net>, arnd@...db.de,
guoren@...nel.org, linux-csky@...r.kernel.org,
linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org
Subject: Re: [PATCH 0/3] sparc: port to copy_thread_tls() and struct
kernel_clone_args
On Mon, May 18, 2020 at 07:18:25PM +0100, Al Viro wrote:
> On Sun, May 17, 2020 at 11:13:47PM +0100, Al Viro wrote:
>
> > Is virtio-blk-pci more resilent to lost interrupt bug introduced in
> > "sun4u: update PCI topology to include simba PCI bridges"? I hadn't tried
> > it yet (reverted to the last working mainline qemu commit for now); IDE
> > definitely is screwed by that - both the Linux and NetBSD drivers, actually.
> >
> > A 50Mb worth of wget(1) is more than enough to trigger that crap;
> >
> > commit 063833a6ec
> > Merge: d634fc0499 bcf9e2c2f2
> > Author: Peter Maydell <peter.maydell@...aro.org>
> > Date: Thu Oct 19 18:42:51 2017 +0100
> >
> > Merge remote-tracking branch 'remotes/mcayland/tags/qemu-sparc-signed' into staging
> >
> > hangs, d634fc0499 works, bcf9e2c2f2 hangs.
> >
> > I hadn't looked into details (the branch itself is only two commits long, but it
> > incorporates an openbios update - 35 commits there, some obviously pci- and
> > sun4u-related), but it's really easy to reproduce - -m 1024 and -hda <image>
> > are probably the only relevant arguments. Even dd if=/dev/sda of=/dev/null bs=64m
> > is often enough to hang it, so I rather doubt that networking (e1000 on pciB,
> > FWIW, with tap for backend) has anything to do with that.
>
> FWIW, virtio-blk-pci does appear to be much more resilent; I hadn't been
> able to reproduce hangs on that, while mounting identical fs from pata_cmd64x
> and doing the same aptitude dist-upgrade --download-only ended up with
>
> ...
> Note: Using 'Download Only' mode, no other actions will be performed.
> Do you want to continue? [Y/n/?] y
> Get: 1 http://ftp.ports.debian.org/debian-ports sid/main sparc64 perl-modules-5.30 all 5.30.2-1 [2,806 kB]
> Get: 2 http://ftp.ports.debian.org/debian-ports sid/main sparc64 libperl5.30 sparc64 5.30.2-1 [3,388 kB]
> Get: 3 http://ftp.ports.debian.org/debian-ports sid/main sparc64 perl sparc64 5.30.2-1 [290 kB]
> Get: 4 http://ftp.ports.debian.org/debian-ports sid/main sparc64 perl-base sparc64 5.30.2-1 [1,427 kB]
> Get: 5 http://ftp.ports.debian.org/debian-ports sid/main sparc64 libsystemd0 sparc64 245.5-3 [309 kB]
> Get: 6 http://ftp.ports.debian.org/debian-ports sid/main sparc64 udev sparc64 245.5-3 [1,356 kB]
> Get: 7 http://ftp.ports.debian.org/debian-ports sid/main sparc64 libudev1 sparc64 245.5-3 [153 kB]
> [ 1472.613660] ata2: lost interrupt (Status 0x58)
> [ 1472.615124] ata1: lost interrupt (Status 0x50)
> [ 1472.615812] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1472.616515] ata1.00: failed command: WRITE DMA
> [ 1472.617145] ata1.00: cmd ca/00:60:0c:9b:23/00:00:00:00:00/e0 tag 0 dma 49152 out
> [ 1472.617145] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1472.618229] ata1.00: status: { DRDY }
> [ 1472.618743] ata1: soft resetting link
> [ 1472.779489] ata1.00: configured for UDMA/33
> [ 1472.781211] ata1: EH complete
> [ 1477.977424] ata2.00: qc timeout (cmd 0xa0)
> [ 1477.977897] ata2.00: TEST_UNIT_READY failed (err_mask=0x5)
> [ 1483.353324] ata2.00: qc timeout (cmd 0xa0)
> [ 1483.353697] ata2.00: TEST_UNIT_READY failed (err_mask=0x5)
> [ 1483.354453] ata2.00: limiting speed to UDMA/33:PIO3
> [ 1488.729323] ata2.00: qc timeout (cmd 0xa0)
> [ 1488.730255] ata2.00: TEST_UNIT_READY failed (err_mask=0x5)
> [ 1488.731320] ata2.00: disabled
> [ 1503.333388] ata1: lost interrupt (Status 0x50)
> [ 1503.333838] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1503.334309] ata1.00: failed command: WRITE DMA EXT
> [ 1503.334647] ata1.00: cmd 35/00:30:0c:7b:23/00:01:00:00:00/e0 tag 0 dma 155648 out
> [ 1503.334647] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1503.335494] ata1.00: status: { DRDY }
> [ 1503.335858] ata1: soft resetting link
> [ 1503.494764] ata1.00: configured for UDMA/33
> [ 1503.495313] ata1: EH complete
> [ 1534.041532] ata1: lost interrupt (Status 0x50)
> [ 1534.042043] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1534.042627] ata1.00: failed command: WRITE DMA
> [ 1534.042969] ata1.00: cmd ca/00:60:0c:9b:23/00:00:00:00:00/e0 tag 0 dma 49152 out
> [ 1534.042969] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1534.043902] ata1.00: status: { DRDY }
> [ 1534.044306] ata1: soft resetting link
> [ 1534.202625] ata1.00: configured for UDMA/33
> [ 1534.203119] ata1: EH complete
> [ 1564.761561] ata1: lost interrupt (Status 0x50)
> [ 1564.762351] ata1.00: limiting speed to UDMA/25:PIO4
> [ 1564.762831] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1564.763388] ata1.00: failed command: WRITE DMA EXT
> [ 1564.763790] ata1.00: cmd 35/00:30:0c:7b:23/00:01:00:00:00/e0 tag 0 dma 155648 out
> [ 1564.763790] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1564.764784] ata1.00: status: { DRDY }
> [ 1564.765470] ata1: soft resetting link
> [ 1564.926509] ata1.00: configured for UDMA/25
> [ 1564.927516] ata1: EH complete
> [ 1575.001438] INFO: task jbd2/sda2-8:143 blocked for more than 120 seconds.
> [ 1575.002273] Tainted: G E 5.6.0-1-sparc64 #1 Debian 5.6.7-1
> [ 1575.002755] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 1575.003323] jbd2/sda2-8 D 0 143 2 0x07000000
> [ 1575.003867] Call Trace:
> [ 1575.004228] [0000000000b10834] schedule+0x54/0x100
> [ 1575.004598] [0000000000b10bf4] io_schedule+0x14/0x40
> [ 1575.004922] [00000000007a6ac4] rq_qos_wait+0xc4/0x160
> [ 1575.009472] [00000000007b5274] wbt_wait+0x74/0xe0
> [ 1575.009832] [00000000007a6760] __rq_qos_throttle+0x20/0x40
> [ 1575.010191] [00000000007975f0] blk_mq_make_request+0xf0/0x5a0
> [ 1575.010558] [000000000078b418] generic_make_request+0x98/0x2e0
> [ 1575.010923] [000000000078b6b8] submit_bio+0x58/0x200
> [ 1575.011245] [000000000067f100] submit_bh_wbc+0x1c0/0x200
> [ 1575.011583] [000000000067f91c] submit_bh+0x1c/0x40
> [ 1575.012627] [0000000010167d7c] jbd2_journal_commit_transaction+0x69c/0x1740 [jbd2]
> [ 1575.013300] [000000001016d530] kjournald2+0x90/0x220 [jbd2]
> [ 1575.013706] [000000000048913c] kthread+0xdc/0x120
> [ 1575.014012] [0000000000405fa4] ret_from_fork+0x1c/0x2c
> [ 1575.014565] [0000000000000000] 0x0
> [ 1575.014888] INFO: task http:1294 blocked for more than 120 seconds.
> [ 1575.015287] Tainted: G E 5.6.0-1-sparc64 #1 Debian 5.6.7-1
> [ 1575.015728] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 1575.016208] http D 0 1294 1283 0x208000105000000
> [ 1575.016616] Call Trace:
> [ 1575.016803] [0000000000b10834] schedule+0x54/0x100
> [ 1575.017289] [0000000000b10bf4] io_schedule+0x14/0x40
> [ 1575.017654] [00000000007a6ac4] rq_qos_wait+0xc4/0x160
> [ 1575.018011] [00000000007b5274] wbt_wait+0x74/0xe0
> [ 1575.018328] [00000000007a6760] __rq_qos_throttle+0x20/0x40
> [ 1575.018677] [00000000007975f0] blk_mq_make_request+0xf0/0x5a0
> [ 1575.019047] [000000000078b418] generic_make_request+0x98/0x2e0
> [ 1575.019421] [000000000078b6b8] submit_bio+0x58/0x200
> [ 1575.019825] [00000000101dcf64] ext4_io_submit+0x44/0x60 [ext4]
> [ 1575.020249] [00000000101c0108] ext4_writepages+0x508/0xc20 [ext4]
> [ 1575.020634] [00000000005b0790] do_writepages+0x30/0xe0
> [ 1575.021000] [00000000005a7618] __filemap_fdatawrite_range+0xb8/0x100
> [ 1575.021542] [00000000005a76bc] filemap_flush+0x1c/0x40
> [ 1575.021944] [00000000101bce24] ext4_alloc_da_blocks+0x24/0x80 [ext4]
> [ 1575.022387] [00000000101abf30] ext4_release_file+0x90/0xe0 [ext4]
> [ 1575.022777] [000000000063d1cc] __fput+0xac/0x280
> [ 1595.481559] ata1: lost interrupt (Status 0x50)
> [ 1595.482352] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1595.483223] ata1.00: failed command: WRITE DMA
> [ 1595.483799] ata1.00: cmd ca/00:60:0c:9b:23/00:00:00:00:00/e0 tag 0 dma 49152 out
> [ 1595.483799] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1595.485513] ata1.00: status: { DRDY }
> [ 1595.489629] ata1: soft resetting link
> [ 1595.650743] ata1.00: configured for UDMA/25
> [ 1595.651259] ata1: EH complete
> [ 1626.201466] ata1: lost interrupt (Status 0x50)
> [ 1626.202778] ata1.00: limiting speed to PIO4
> [ 1626.203678] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1626.205103] ata1.00: failed command: WRITE DMA EXT
> [ 1626.206127] ata1.00: cmd 35/00:30:0c:7b:23/00:01:00:00:00/e0 tag 0 dma 155648 out
> [ 1626.206127] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1626.208832] ata1.00: status: { DRDY }
> [ 1626.209856] ata1: soft resetting link
> [ 1626.370839] ata1.00: configured for PIO4
> [ 1626.371357] ata1: EH complete
> [ 1656.921546] ata1: lost interrupt (Status 0x58)
> [ 1656.922076] ata1.00: limiting speed to PIO3
> [ 1656.922390] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1656.922837] ata1.00: failed command: WRITE MULTIPLE
> [ 1656.923190] ata1.00: cmd c5/00:60:0c:9b:23/00:00:00:00:00/e0 tag 0 pio 49152 out
> [ 1656.923190] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1656.924057] ata1.00: status: { DRDY }
> [ 1656.924441] ata1: soft resetting link
> [ 1657.082383] ata1.00: configured for PIO3
> [ 1657.082940] ata1: EH complete
> [ 1687.641729] ata1: lost interrupt (Status 0x58)
> [ 1687.642217] ata1.00: limiting speed to PIO0
> [ 1687.642526] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1687.642963] ata1.00: failed command: WRITE MULTIPLE EXT
> [ 1687.643336] ata1.00: cmd 39/00:30:0c:7b:23/00:01:00:00:00/e0 tag 0 pio 155648 out
> [ 1687.643336] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1687.644276] ata1.00: status: { DRDY }
> [ 1687.644649] ata1: soft resetting link
> [ 1687.802485] ata1.00: configured for PIO0
> [ 1687.802946] ata1: EH complete
> [ 1695.833443] INFO: task jbd2/sda2-8:143 blocked for more than 241 seconds.
> [ 1695.834181] Tainted: G E 5.6.0-1-sparc64 #1 Debian 5.6.7-1
> [ 1695.834915] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 1695.835667] jbd2/sda2-8 D 0 143 2 0x07000000
> [ 1695.836230] Call Trace:
> [ 1695.836537] [0000000000b10834] schedule+0x54/0x100
> [ 1695.837186] [0000000000b10bf4] io_schedule+0x14/0x40
> [ 1695.837753] [00000000007a6ac4] rq_qos_wait+0xc4/0x160
> [ 1695.838244] [00000000007b5274] wbt_wait+0x74/0xe0
> [ 1695.838717] [00000000007a6760] __rq_qos_throttle+0x20/0x40
> [ 1695.839247] [00000000007975f0] blk_mq_make_request+0xf0/0x5a0
> [ 1695.839811] [000000000078b418] generic_make_request+0x98/0x2e0
> [ 1695.840366] [000000000078b6b8] submit_bio+0x58/0x200
> [ 1695.840841] [000000000067f100] submit_bh_wbc+0x1c0/0x200
> [ 1695.841561] [000000000067f91c] submit_bh+0x1c/0x40
> [ 1695.842111] [0000000010167d7c] jbd2_journal_commit_transaction+0x69c/0x1740 [jbd2]
> [ 1695.842851] [000000001016d530] kjournald2+0x90/0x220 [jbd2]
> [ 1695.843392] [000000000048913c] kthread+0xdc/0x120
> [ 1695.843860] [0000000000405fa4] ret_from_fork+0x1c/0x2c
> [ 1695.844355] [0000000000000000] 0x0
> [ 1695.844707] INFO: task http:1294 blocked for more than 241 seconds.
> [ 1695.845478] Tainted: G E 5.6.0-1-sparc64 #1 Debian 5.6.7-1
> [ 1695.846180] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 1695.846905] http D 0 1294 1283 0x208000105000000
> [ 1695.847500] Call Trace:
> [ 1695.847786] [0000000000b10834] schedule+0x54/0x100
> [ 1695.848272] [0000000000b10bf4] io_schedule+0x14/0x40
> [ 1695.848757] [00000000007a6ac4] rq_qos_wait+0xc4/0x160
> [ 1695.849477] [00000000007b5274] wbt_wait+0x74/0xe0
> [ 1695.850000] [00000000007a6760] __rq_qos_throttle+0x20/0x40
> [ 1695.850557] [00000000007975f0] blk_mq_make_request+0xf0/0x5a0
> [ 1695.851107] [000000000078b418] generic_make_request+0x98/0x2e0
> [ 1695.851650] [000000000078b6b8] submit_bio+0x58/0x200
> [ 1695.852214] [00000000101dcf64] ext4_io_submit+0x44/0x60 [ext4]
> [ 1695.852837] [00000000101c0108] ext4_writepages+0x508/0xc20 [ext4]
> [ 1695.853638] [00000000005b0790] do_writepages+0x30/0xe0
> [ 1695.854162] [00000000005a7618] __filemap_fdatawrite_range+0xb8/0x100
> [ 1695.854765] [00000000005a76bc] filemap_flush+0x1c/0x40
> [ 1695.855316] [00000000101bce24] ext4_alloc_da_blocks+0x24/0x80 [ext4]
> [ 1695.855973] [00000000101abf30] ext4_release_file+0x90/0xe0 [ext4]
> [ 1695.856568] [000000000063d1cc] __fput+0xac/0x280
> [ 1695.857152] INFO: task kworker/0:3:1295 blocked for more than 120 seconds.
> [ 1695.857878] Tainted: G E 5.6.0-1-sparc64 #1 Debian 5.6.7-1
> [ 1695.858550] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 1695.859262] kworker/0:3 D 0 1295 2 0x01000000
> [ 1695.860238] Workqueue: events ata_scsi_dev_rescan [libata]
> [ 1695.860828] Call Trace:
> [ 1695.861273] [0000000000b10834] schedule+0x54/0x100
> [ 1695.861814] [0000000000b10bf4] io_schedule+0x14/0x40
> [ 1695.862295] [000000000079a33c] blk_mq_get_tag+0x11c/0x2c0
> [ 1695.862826] [0000000000794e28] blk_mq_get_request+0xc8/0x3a0
> [ 1695.863294] [000000000079514c] blk_mq_alloc_request+0x4c/0xa0
> [ 1695.863686] [00000000007896f0] blk_get_request+0x30/0xe0
> [ 1695.864093] [000000001003bd14] __scsi_execute+0x34/0x1a0 [scsi_mod]
> [ 1695.864544] [0000000010034c6c] scsi_vpd_inquiry+0x6c/0xc0 [scsi_mod]
> [ 1695.865018] [0000000010034dec] scsi_get_vpd_buf+0x4c/0x80 [scsi_mod]
> [ 1695.865640] [0000000010035afc] scsi_attach_vpd+0x3c/0x180 [scsi_mod]
> [ 1695.866099] [00000000100402f8] scsi_rescan_device+0x18/0xa0 [scsi_mod]
> [ 1695.866568] [00000000100a6620] ata_scsi_dev_rescan+0x80/0xe0 [libata]
> [ 1695.867009] [0000000000482eb4] process_one_work+0x194/0x480
> [ 1695.867392] [00000000004832e4] worker_thread+0x144/0x540
> [ 1695.867759] [000000000048913c] kthread+0xdc/0x120
> [ 1695.868095] [0000000000405fa4] ret_from_fork+0x1c/0x2c
> [ 1718.361472] ata1: lost interrupt (Status 0x58)
> [ 1718.362753] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1718.364199] ata1.00: failed command: WRITE MULTIPLE
> [ 1718.365436] ata1.00: cmd c5/00:60:0c:9b:23/00:00:00:00:00/e0 tag 0 pio 49152 out
> [ 1718.365436] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1718.368421] ata1.00: status: { DRDY }
> [ 1718.369510] ata1: soft resetting link
> [ 1718.530645] ata1.00: configured for PIO0
> [ 1718.531608] ata1: EH complete
> [ 1749.081528] ata1: lost interrupt (Status 0x58)
> [ 1749.082016] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1749.082490] ata1.00: failed command: WRITE MULTIPLE EXT
> [ 1749.082861] ata1.00: cmd 39/00:30:0c:7b:23/00:01:00:00:00/e0 tag 0 pio 155648 out
> [ 1749.082861] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1749.083785] ata1.00: status: { DRDY }
> [ 1749.084186] ata1: soft resetting link
> [ 1749.242344] ata1.00: configured for PIO0
> [ 1749.242776] ata1: EH complete
> [ 1779.801525] ata1: lost interrupt (Status 0x58)
> [ 1779.802194] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1779.802933] ata1.00: failed command: WRITE MULTIPLE
> [ 1779.803424] ata1.00: cmd c5/00:60:0c:9b:23/00:00:00:00:00/e0 tag 0 pio 49152 out
> [ 1779.803424] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1779.804678] ata1.00: status: { DRDY }
> [ 1779.805327] ata1: soft resetting link
> [ 1779.966461] ata1.00: configured for PIO0
> [ 1779.968232] sd 0:0:0:0: [sda] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=338s
> [ 1779.969221] sd 0:0:0:0: [sda] tag#0 Sense Key : Illegal Request [current]
> [ 1779.969921] sd 0:0:0:0: [sda] tag#0 Add. Sense: Unaligned write command
> [ 1779.971038] sd 0:0:0:0: [sda] tag#0 CDB: Write(10) 2a 00 00 23 9b 0c 00 00 60 00
> [ 1779.971722] blk_update_request: I/O error, dev sda, sector 2333452 op 0x1:(WRITE) flags 0x0 phys_seg 1 prio class 0
> [ 1779.972504] EXT4-fs warning (device sda2): ext4_end_bio:347: I/O error 10 writing to inode 130691 starting block 291693)
> [ 1779.973770] ata1: EH complete
> [ 1810.521509] ata1: lost interrupt (Status 0x58)
> [ 1810.522165] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1810.522895] ata1.00: failed command: WRITE MULTIPLE EXT
> [ 1810.523415] ata1.00: cmd 39/00:30:0c:7b:23/00:01:00:00:00/e0 tag 0 pio 155648 out
> [ 1810.523415] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1810.524696] ata1.00: status: { DRDY }
> [ 1810.525363] ata1: soft resetting link
> [ 1810.686255] ata1.00: configured for PIO0
> [ 1810.686951] sd 0:0:0:0: [sda] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=337s
> [ 1810.687809] sd 0:0:0:0: [sda] tag#0 Sense Key : Illegal Request [current]
> [ 1810.688449] sd 0:0:0:0: [sda] tag#0 Add. Sense: Unaligned write command
> [ 1810.689213] sd 0:0:0:0: [sda] tag#0 CDB: Write(10) 2a 00 00 23 7b 0c 00 01 30 00
> [ 1810.689966] blk_update_request: I/O error, dev sda, sector 2325260 op 0x1:(WRITE) flags 0x0 phys_seg 3 prio class 0
> [ 1810.690901] EXT4-fs warning (device sda2): ext4_end_bio:347: I/O error 10 writing to inode 130696 starting block 290695)
> [ 1810.692093] ata1: EH complete
> [ 1841.253842] ata1: lost interrupt (Status 0x58)
> [ 1841.254522] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1841.255276] ata1.00: failed command: WRITE MULTIPLE
> [ 1841.255781] ata1.00: cmd c5/00:78:d4:61:49/00:00:00:00:00/e0 tag 0 pio 61440 out
> [ 1841.255781] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1841.257269] ata1.00: status: { DRDY }
> [ 1841.257820] ata1: soft resetting link
> [ 1841.418388] ata1.00: configured for PIO0
> [ 1841.418961] ata1: EH complete
> [ 1871.973375] ata1: lost interrupt (Status 0x58)
> [ 1871.973863] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1871.974338] ata1.00: failed command: WRITE MULTIPLE
> [ 1871.974727] ata1.00: cmd c5/00:a0:8c:0e:3b/00:00:00:00:00/e0 tag 0 pio 81920 out
> [ 1871.974727] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1871.975707] ata1.00: status: { DRDY }
> [ 1871.976096] ata1: soft resetting link
> [ 1872.134384] ata1.00: configured for PIO0
> [ 1872.134988] ata1: EH complete
> [ 1902.681573] ata1: lost interrupt (Status 0x58)
> [ 1902.682340] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1902.683115] ata1.00: failed command: WRITE MULTIPLE
> [ 1902.683674] ata1.00: cmd c5/00:78:d4:61:49/00:00:00:00:00/e0 tag 0 pio 61440 out
> [ 1902.683674] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1902.685158] ata1.00: status: { DRDY }
> [ 1902.689610] ata1: soft resetting link
> [ 1902.850306] ata1.00: configured for PIO0
> [ 1902.850767] ata1: EH complete
> [ 1933.401429] ata1: lost interrupt (Status 0x58)
> [ 1933.401961] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> [ 1933.402474] ata1.00: failed command: WRITE MULTIPLE
> [ 1933.402878] ata1.00: cmd c5/00:a0:8c:0e:3b/00:00:00:00:00/e0 tag 0 pio 81920 out
> [ 1933.402878] res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> [ 1933.403875] ata1.00: status: { DRDY }
> [ 1933.404289] ata1: soft resetting link
> [ 1933.562384] ata1.00: configured for PIO0
> [ 1933.562869] ata1: EH complete
> [ 1937.497217] INFO: task jbd2/sda2-8:143 blocked for more than 120 seconds.
> [ 1937.497777] Tainted: G E 5.6.0-1-sparc64 #1 Debian 5.6.7-1
> [ 1937.498257] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 1937.498777] jbd2/sda2-8 D 0 143 2 0x03000000
> [ 1937.499174] Call Trace:
> [ 1937.499400] [0000000000b10834] schedule+0x54/0x100
> [ 1937.499746] [0000000000b10bf4] io_schedule+0x14/0x40
> [ 1937.500100] [0000000000b1108c] bit_wait_io+0xc/0x80
> [ 1937.500450] [0000000000b10c80] __wait_on_bit+0x60/0x100
> [ 1937.500815] [0000000000b10d9c] out_of_line_wait_on_bit+0x7c/0xa0
> [ 1937.501357] [000000000067d6d0] __wait_on_buffer+0x30/0x40
> [ 1937.501796] [00000000101685d4] jbd2_journal_commit_transaction+0xef4/0x1740 [jbd2]
> [ 1937.502330] [000000001016d530] kjournald2+0x90/0x220 [jbd2]
> [ 1937.502728] [000000000048913c] kthread+0xdc/0x120
> [ 1937.503061] [0000000000405fa4] ret_from_fork+0x1c/0x2c
> [ 1937.503407] [0000000000000000] 0x0
> [ 1937.503658] INFO: task kworker/u2:2:1138 blocked for more than 120 seconds.
> [ 1937.504096] Tainted: G E 5.6.0-1-sparc64 #1 Debian 5.6.7-1
> [ 1937.504544] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 1937.505128] kworker/u2:2 D 0 1138 2 0x05000000
> [ 1937.505677] Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work [ext4]
> [ 1937.506109] Call Trace:
> [ 1937.506306] [0000000000b10834] schedule+0x54/0x100
> [ 1937.506643] [0000000000b10bf4] io_schedule+0x14/0x40
> [ 1937.507007] [0000000000b1108c] bit_wait_io+0xc/0x80
> [ 1937.507361] [0000000000b10c80] __wait_on_bit+0x60/0x100
> [ 1937.507717] [0000000000b10d9c] out_of_line_wait_on_bit+0x7c/0xa0
> [ 1937.508150] [0000000010166138] do_get_write_access+0x2f8/0x440 [jbd2]
> [ 1937.508587] [0000000010166300] jbd2_journal_get_write_access+0x80/0xa0 [jbd2]
> [ 1937.509203] [000000001019c400] __ext4_journal_get_write_access+0x20/0x60 [ext4]
> [ 1937.509812] [00000000101bf824] ext4_reserve_inode_write+0x84/0xc0 [ext4]
> [ 1937.510301] [00000000101bfa48] ext4_mark_inode_dirty+0x28/0x1e0 [ext4]
> [ 1937.510766] [000000001019ce74] __ext4_ext_dirty.isra.0+0x54/0xa0 [ext4]
> [ 1937.511234] [00000000101a66c8] ext4_ext_map_blocks+0x828/0x17c0 [ext4]
> [ 1937.511699] [00000000101bb638] ext4_map_blocks+0xd8/0x6a0 [ext4]
> [ 1937.512134] [00000000101a882c] ext4_convert_unwritten_extents+0x14c/0x200 [ext4]
> [ 1937.512706] [00000000101a894c] ext4_convert_unwritten_io_end_vec+0x6c/0x100 [ext4]
> [ 1937.513388] [00000000101dca00] ext4_end_io_rsv_work+0xe0/0x1c0 [ext4]
> [ 1937.513853] INFO: task http:1294 blocked for more than 120 seconds.
> [ 1937.514287] Tainted: G E 5.6.0-1-sparc64 #1 Debian 5.6.7-1
> [ 1937.514735] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 1937.515277] http D 0 1294 1283 0x208000103000000
> [ 1937.515732] Call Trace:
> [ 1937.515925] [0000000000b10834] schedule+0x54/0x100
> [ 1937.516254] [0000000000b10bf4] io_schedule+0x14/0x40
> [ 1937.516586] [0000000000b1108c] bit_wait_io+0xc/0x80
> [ 1937.516924] [0000000000b10c80] __wait_on_bit+0x60/0x100
> [ 1937.517426] [0000000000b10d9c] out_of_line_wait_on_bit+0x7c/0xa0
> [ 1937.517897] [0000000010166138] do_get_write_access+0x2f8/0x440 [jbd2]
> [ 1937.518346] [0000000010166300] jbd2_journal_get_write_access+0x80/0xa0 [jbd2]
> [ 1937.518855] [000000001019c400] __ext4_journal_get_write_access+0x20/0x60 [ext4]
> [ 1937.519369] [00000000101bf824] ext4_reserve_inode_write+0x84/0xc0 [ext4]
> [ 1937.519883] [00000000101bfa48] ext4_mark_inode_dirty+0x28/0x1e0 [ext4]
> [ 1937.520365] [00000000101c3c6c] ext4_dirty_inode+0x4c/0x80 [ext4]
> [ 1937.520755] [000000000066fe30] __mark_inode_dirty+0x130/0x340
> [ 1937.521307] [00000000101c38ec] ext4_setattr+0x50c/0x840 [ext4]
> [ 1937.521744] [000000000065c8c4] notify_change+0x384/0x560
> [ 1937.522093] [0000000000677104] utimes_common.isra.0+0xc4/0x1a0
> [ 1937.522469] [00000000006772e0] do_utimes+0x100/0x180
> [ 1937.522799] INFO: task kworker/0:3:1295 blocked for more than 120 seconds.
> [ 1937.523233] Tainted: G E 5.6.0-1-sparc64 #1 Debian 5.6.7-1
> [ 1937.523685] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 1937.524186] kworker/0:3 D 0 1295 2 0x02000000
> [ 1937.524633] Workqueue: events ata_scsi_dev_rescan [libata]
> [ 1937.525100] Call Trace:
> [ 1937.525348] [0000000000b10834] schedule+0x54/0x100
> [ 1937.525703] [0000000000b10bf4] io_schedule+0x14/0x40
> [ 1937.526040] [000000000079a33c] blk_mq_get_tag+0x11c/0x2c0
> [ 1937.526394] [0000000000794e28] blk_mq_get_request+0xc8/0x3a0
> [ 1937.526766] [000000000079514c] blk_mq_alloc_request+0x4c/0xa0
> [ 1937.527186] [00000000007896f0] blk_get_request+0x30/0xe0
> [ 1937.527581] [000000001003bd14] __scsi_execute+0x34/0x1a0 [scsi_mod]
> [ 1937.528022] [0000000010034c6c] scsi_vpd_inquiry+0x6c/0xc0 [scsi_mod]
> [ 1937.528485] [0000000010034dec] scsi_get_vpd_buf+0x4c/0x80 [scsi_mod]
> [ 1937.528938] [0000000010034e30] scsi_update_vpd_page+0x10/0x60 [scsi_mod]
> [ 1937.529530] [0000000010035b90] scsi_attach_vpd+0xd0/0x180 [scsi_mod]
> [ 1937.529988] [00000000100402f8] scsi_rescan_device+0x18/0xa0 [scsi_mod]
> [ 1937.530489] [00000000100a6620] ata_scsi_dev_rescan+0x80/0xe0 [libata]
> [ 1937.530906] [0000000000482eb4] process_one_work+0x194/0x480
> [ 1937.531270] [00000000004832e4] worker_thread+0x144/0x540
> [ 1937.531618] [000000000048913c] kthread+0xdc/0x120
>
> ... at which point I killed the damn thing. Unpingable, doesn't react to serial
> console (the output is obviously there, the input doesn't reach shell, at the
> very least). That was on current debian kernel (5.6.0-based), but the mainline
> 5.7-rc1 behaves the same way. qemu is (yesterday) mainline:
>
> commit debe78ce14bf8f8940c2bdf3ef387505e9e035a9 (HEAD -> master, origin/master, origin/HEAD)
> Merge: 66706192de 9ecaf5ccec
> Author: Peter Maydell <peter.maydell@...aro.org>
> Date: Fri May 15 19:51:16 2020 +0100
>
> Merge remote-tracking branch 'remotes/rth/tags/pull-fpu-20200515' into staging
>
> and anything since bcf9e2c2f2 exhibits that behaviour. qemu arguments:
> ../qemu1/build/sparc64-softmmu/qemu-system-sparc64 \
> -hda sid.img \
> -drive id=hd,if=none,file=foo.raw,format=raw \
> -device virtio-blk-pci,bus=pciB,drive=hd \
> -netdev tap,ifname=tap4,script=no,downscript=no,id=net \
> -device e1000,bus=pciB,netdev=net \
> -nographic -m 1024
> foo.raw and sid.img have the same contents (sid.img is qcow2 - might or might not
> cause enough timing differences to trigger whatever's happening).
>
> Looks like something got screwed in PCI interrupt routing in that sun4u branch back in
> 2017. If you have any suggestions on debugging that, I'd be glad to help; I'm not
> familiar with openbios guts, though ;-/
Fwiw, I'm getting access to a Sparc T5 soon if you want I can ping you
once I do in case you have something that you'd rather test on real
hardware.
Christian
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