Verification on Trusty ESM updates.
$ uname -rv
3.13.0-175-generic #226-Ubuntu SMP Fri Nov 8 15:26:34 UTC 2019
The problem does not happen with the test-case.
(kmod.c updated for the new kernel uname strings, same instruction addresses
from test build apply.)
Test case snippets:
Migrated from CPUs 0-3/node0 to 4-7/node1.
[ 1629.548016] cpu 4/pid 1924/task TWO :: change_prot_numa() :: address =
0x7fc0ade00000, end = 0x7fc0ae000000
[ 1631.552332] cpu 5/pid 1925/task ONE :: do_huge_pmd_numa_page() :: addr/mask
= 0x7fc0ade00000, addr = 0x7fc0ade00000, pmd = 0x80003ffecba009e6, *pmdp =
0x80003ffecba009e6, pmdp = 0xffff880139881b78
[ 1631.552356] cpu 4/pid 1924/task TWO :: do_huge_pmd_numa_page() :: addr/mask
= 0x7fc0ade00000, addr = 0x7fc0ade00000, pmd = 0x80003ffecba009e6, *pmdp =
0x80003ffecba009e6, pmdp = 0xffff880139881b78
[ 1631.552361] cpu 4/pid 1924/task TWO :: Stage 1. T2 awaking up T1. Task 2 at
entry point.
[ 1631.552364] cpu 4/pid 1924/task TWO :: Stage 2. T2 waiting on T1. Task 2
waiting for Task 1 at exit/migration point.
[ 1631.556003] cpu 5/pid 1925/task ONE :: Stage 1. T1 waiting on T2. Task 1 at
entry point, checking for Task 2 at entry point too.
[ 1631.556003] cpu 5/pid 1925/task ONE :: Stage 1. T1 resumed by T2
[ 1631.572927] cpu 5/pid 1925/task ONE :: migrate_misplaced_transhuge_page() ::
addr/mask = 0x7fc0ade00000, addr = 0x7fc0ade00000, pmd = 0x80003ffecba009e6,
*pmdp = 0x80003ffecba009e6, pmdp = 0xffff880139881b78, node = 1
[ 1631.576916] cpu 5/pid 1925/task ONE :: Stage 2. T1 awaking up T2. Task 1 at
migration point.
[ 1631.576916] cpu 5/pid 1925/task ONE :: Stage 3. T1 waiting on T2. Task 1
waiting for Task 2 to check migration status.
[ 1631.556007] cpu 4/pid 1924/task TWO :: Stage 2. T2 resumed by T1
[ 1631.579727] cpu 4/pid 1924/task TWO :: Stage 3. T2 awaking up T1. Task 2 has
checked migration status.
[ 1631.579728] cpu 4/pid 1924/task TWO :: Stage 4. T2 waiting on T1. Task 2
waiting for Task 1 to clear the PMD.
[ 1631.576916] cpu 5/pid 1925/task ONE :: Stage 3. T1 resumed by T2
[ 1631.590927] cpu 5/pid 1925/task ONE :: Stage 4. T1 awaking up T2. Task 1 has
cleared the PMD.
[ 1631.593172] cpu 5/pid 1925/task ONE :: Stage 4. T1 warning up T2: it may BUG!
[ 1631.594209] cpu 5/pid 1925/task ONE :: Stage 5. T1 sleep for 5s.
[ 1632.576116] cpu 4/pid 1924/task TWO :: Stage 4. T2 resumed by T1
[ 1632.579828] cpu 4/pid 1924/task TWO :: Stage 4. T2 sleep for 1s. any BUG
afterward?
[ 1636.592130] cpu 5/pid 1925/task ONE :: Stage 5. T1 slept for 5s.
Migrated from CPUs 4-7/node1 to 0-3/node0.
[ 123.072019] cpu 0/pid 1340/task TWO :: change_prot_numa() :: address =
0x7fb236c00000, end = 0x7fb236e00000
[ 125.076242] cpu 1/pid 1341/task ONE :: do_huge_pmd_numa_page() :: addr/mask
= 0x7fb236c00000, addr = 0x7fb236c00000, pmd = 0x80003ffdc98009e6, *pmdp =
0x80003ffdc98009e6, pmdp = 0xffff8802380b0db0
[ 125.076246] cpu 0/pid 1340/task TWO :: do_huge_pmd_numa_page() :: addr/mask
= 0x7fb236c00000, addr = 0x7fb236c00000, pmd = 0x80003ffdc98009e6, *pmdp =
0x80003ffdc98009e6, pmdp = 0xffff8802380b0db0
[ 125.076249] cpu 0/pid 1340/task TWO :: Stage 1. T2 awaking up T1. Task 2 at
entry point.
[ 125.076253] cpu 0/pid 1340/task TWO :: Stage 2. T2 waiting on T1. Task 2
waiting for Task 1 at exit/migration point.
[ 125.080047] cpu 1/pid 1341/task ONE :: Stage 1. T1 waiting on T2. Task 1 at
entry point, checking for Task 2 at entry point too.
[ 125.080047] cpu 1/pid 1341/task ONE :: Stage 1. T1 resumed by T2
[ 125.094778] cpu 1/pid 1341/task ONE :: migrate_misplaced_transhuge_page() ::
addr/mask = 0x7fb236c00000, addr = 0x7fb236c00000, pmd = 0x80003ffdc98009e6,
*pmdp = 0x80003ffdc98009e6, pmdp = 0xffff8802380b0db0, node = 0
[ 125.098769] cpu 1/pid 1341/task ONE :: Stage 2. T1 awaking up T2. Task 1 at
migration point.
[ 125.098769] cpu 1/pid 1341/task ONE :: Stage 3. T1 waiting on T2. Task 1
waiting for Task 2 to check migration status.
[ 125.080004] cpu 0/pid 1340/task TWO :: Stage 2. T2 resumed by T1
[ 125.101893] cpu 0/pid 1340/task TWO :: Stage 3. T2 awaking up T1. Task 2 has
checked migration status.
[ 125.101894] cpu 0/pid 1340/task TWO :: Stage 4. T2 waiting on T1. Task 2
waiting for Task 1 to clear the PMD.
[ 125.098769] cpu 1/pid 1341/task ONE :: Stage 3. T1 resumed by T2
[ 125.113262] cpu 1/pid 1341/task ONE :: Stage 4. T1 awaking up T2. Task 1 has
cleared the PMD.
[ 125.115574] cpu 1/pid 1341/task ONE :: Stage 4. T1 warning up T2: it may BUG!
[ 125.116643] cpu 1/pid 1341/task ONE :: Stage 5. T1 sleep for 5s.
[ 126.104253] cpu 0/pid 1340/task TWO :: Stage 4. T2 resumed by T1
[ 126.107601] cpu 0/pid 1340/task TWO :: Stage 4. T2 sleep for 1s. any BUG
afterward?
[ 130.117013] cpu 1/pid 1341/task ONE :: Stage 5. T1 slept for 5s.
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You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1813018
Title:
Kernel Oops - unable to handle kernel paging request; RIP is at
wait_migrate_huge_page+0x51/0x70
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813018/+subscriptions
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