[PATCH v6 00/18] Use block pr_ops in LIO

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[sorry for the adding you in CC]

While running LTP controllers test suite on this patch set applied on top of
the next-20230406 and the following kernel panic noticed on qemu-x86_64.


Lore link: https://lore.kernel.org/linux-block/20230407200551.12660-1-michael.christie@xxxxxxxxxx/


cpuset_inherit 31 TPASS: mem_exclusive: Inherited information is right!
cpuset_inherit 33 TPASS: mem_hardwall: Inherited information is right!
<4>[ 1234.875309] int3: 0000 [#1] PREEMPT SMP PTI
<4>[ 1234.875748] CPU: 1 PID: 32990 Comm: umount Not tainted 6.3.0-rc5-next-20230406 #1
<4>[ 1234.875946] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
<4>[ 1234.876062] RIP: 0010:__alloc_pages+0xdf/0x310
<4>[ 1234.876666] Code: 4c 89 45 b0 83 3d b8 1c cb 01 00 0f 85 a2 01 00 00 44 89 f0 c1 e8 03 83 e0 03 89 75 a0 89 45 c0 be 01 00 00 00 4c 89 45 98 0f <1f> 44 00 00 4d 89 c5 44 89 f0 44 89 75 a4 41 f7 c6 00 04 00 00 74
<4>[ 1234.876885] RSP: 0000:ffff8b9305f47c10 EFLAGS: 00000202
<4>[ 1234.877418] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000
<4>[ 1234.877433] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000140cca
<4>[ 1234.877446] RBP: ffff8b9305f47c78 R08: 0000000000000000 R09: 0000000000000000
<4>[ 1234.877460] R10: 0000000000100cca R11: 0000000000000000 R12: 0000000000000003
<4>[ 1234.877472] R13: ffff88d28b753b00 R14: 0000000000140cca R15: ffff88d2ffffb300
<4>[ 1234.877518] FS:  0000000000000000(0000) GS:ffff88d2fbd00000(0000) knlGS:0000000000000000
<4>[ 1234.877547] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[ 1234.877568] CR2: 0000000000408ee0 CR3: 0000000111432000 CR4: 00000000000006e0
<4>[ 1234.877662] Call Trace:
<4>[ 1234.877828]  <TASK>
<4>[ 1234.877954]  __folio_alloc+0x1e/0x50
<4>[ 1234.878051]  vma_alloc_folio+0x4af/0x520
<4>[ 1234.878066]  ? _raw_spin_unlock+0x1a/0x40
<4>[ 1234.878079]  ? do_wp_page+0x164/0xdd0
<4>[ 1234.878093]  ? trace_preempt_on+0x1e/0x80
<4>[ 1234.878105]  ? preempt_count_sub+0x63/0x80
<4>[ 1234.878118]  do_wp_page+0x3cb/0xdd0
<4>[ 1234.878129]  ? handle_mm_fault+0x739/0x19e0
<4>[ 1234.878142]  ? _raw_spin_lock+0x23/0x50
<4>[ 1234.878159]  handle_mm_fault+0x770/0x19e0
<4>[ 1234.878170]  ? up_write+0x52/0xe0
<4>[ 1234.878196]  do_user_addr_fault+0x4d4/0x6c0
<4>[ 1234.878210]  ? trace_hardirqs_off_finish+0x38/0x90
<4>[ 1234.878222]  exc_page_fault+0x80/0x1d0
<4>[ 1234.878234]  asm_exc_page_fault+0x2b/0x30
<4>[ 1234.878291] RIP: 0033:0x7f3f910e65f6
<4>[ 1234.878542] Code: 2f 0a 00 00 e8 5b 23 ff ff 48 89 85 60 fd ff ff 48 8b 85 88 fd ff ff 48 8b 80 e8 00 00 00 48 85 c0 74 0b 48 8b 9d 68 fd ff ff <48> 89 58 08 48 8b 85 68 fd ff ff c7 40 18 01 00 00 00 e8 43 2b fe
<4>[ 1234.878552] RSP: 002b:00007fff6f8dce50 EFLAGS: 00000206
<4>[ 1234.878563] RAX: 0000000000408ed8 RBX: 00007f3f910fe0d8 RCX: 00007f3f910c6270
<4>[ 1234.878569] RDX: 0000000000000000 RSI: 00007f3f910fe2a0 RDI: 00007fff6f8dcf10
<4>[ 1234.878575] RBP: 00007fff6f8dd110 R08: 0000000000000000 R09: 0000000000000007
<4>[ 1234.878581] R10: 0000000000000000 R11: 0000000000000008 R12: 0000000000000000
<4>[ 1234.878585] R13: 00007f3f910fe2a0 R14: 00007fff6f8dced0 R15: 0000000000000000
<4>[ 1234.878636]  </TASK>
<4>[ 1234.878693] Modules linked in:
<4>[ 1234.894886] ---[ end trace 0000000000000000 ]---
<4>[ 1234.895879] RIP: 0010:__alloc_pages+0xdf/0x310
<4>[ 1234.895921] Code: 4c 89 45 b0 83 3d b8 1c cb 01 00 0f 85 a2 01 00 00 44 89 f0 c1 e8 03 83 e0 03 89 75 a0 89 45 c0 be 01 00 00 00 4c 89 45 98 0f <1f> 44 00 00 4d 89 c5 44 89 f0 44 89 75 a4 41 f7 c6 00 04 00 00 74
<4>[ 1234.895936] RSP: 0000:ffff8b9305f47c10 EFLAGS: 00000202
<4>[ 1234.895956] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000
<4>[ 1234.895966] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000140cca
<4>[ 1234.895977] RBP: ffff8b9305f47c78 R08: 0000000000000000 R09: 0000000000000000
<4>[ 1234.895985] R10: 0000000000100cca R11: 0000000000000000 R12: 0000000000000003
<4>[ 1234.895993] R13: ffff88d28b753b00 R14: 0000000000140cca R15: ffff88d2ffffb300
<4>[ 1234.896003] FS:  0000000000000000(0000) GS:ffff88d2fbd00000(0000) knlGS:0000000000000000
<4>[ 1234.896016] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[ 1234.896026] CR2: 0000000000408ee0 CR3: 0000000111432000 CR4: 00000000000006e0
<0>[ 1234.896379] Kernel panic - not syncing: Fatal exception in interrupt
<0>[ 1234.900046] Kernel Offset: 0x8800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)

Links:
https://qa-reports.linaro.org/~anders.roxell/linux-mainline-patches/build/lore_kernel_org_linux-block_20230407200551_12660-1-michael_christie_oracle_com/testrun/16172098/suite/log-parser-test/test/check-kernel-panic/log
https://qa-reports.linaro.org/~anders.roxell/linux-mainline-patches/build/lore_kernel_org_linux-block_20230407200551_12660-1-michael_christie_oracle_com/testrun/16172061/suite/log-parser-test/test/check-kernel-panic/log

https://qa-reports.linaro.org/~anders.roxell/linux-mainline-patches/build/lore_kernel_org_linux-block_20230407200551_12660-1-michael_christie_oracle_com/testrun/16172098/suite/log-parser-test/tests/
https://qa-reports.linaro.org/~anders.roxell/linux-mainline-patches/build/lore_kernel_org_linux-block_20230407200551_12660-1-michael_christie_oracle_com/testrun/16172061/suite/log-parser-test/tests/


Steps to reproduce:
-------------------

# To install tuxrun on your system globally:
# sudo pip3 install -U tuxrun==0.41.0
#
# See https://tuxrun.org/ for complete documentation.

tuxrun   \
 --runtime podman   \
 --device qemu-x86_64   \
 --kernel https://storage.tuxsuite.com/public/linaro/anders/builds/2OGpdVeBBG4Gj6aACnSdSGva2LN/bzImage   \
 --modules https://storage.tuxsuite.com/public/linaro/anders/builds/2OGpdVeBBG4Gj6aACnSdSGva2LN/modules.tar.xz   \
 --rootfs https://storage.tuxsuite.com/public/linaro/lkft/oebuilds/2OFRZUnV2Q9jOFdE3gH3Gq2v692/images/intel-corei7-64/lkft-tux-image-intel-corei7-64-20230410193144.rootfs.ext4.gz   \
 --parameters SKIPFILE=skipfile-lkft.yaml   \
 --parameters SHARD_NUMBER=10   \
 --parameters SHARD_INDEX=10   \
 --image docker.io/lavasoftware/lava-dispatcher:2023.01.0020.gc1598238f   \
 --tests ltp-controllers   \
 --timeouts boot=15 ltp-controllers=80



--
Linaro LKFT
https://lkft.linaro.org





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