[Bug 203647] Locking API testsuite fails "mixed read-lock/lock-write ABBA" rlock on kernels >=4.14.x
https://bugzilla.kernel.org/show_bug.cgi?id=203647 Anatoly Pugachev (mator...@gmail.com) changed: What|Removed |Added CC||mator...@gmail.com --- Comment #7 from Anatoly Pugachev (mator...@gmail.com) --- it's the same for sparc64: ` [0.20] PROMLIB: Sun IEEE Boot Prom 'OBP 4.38.12 2018/03/28 14:54' [0.32] PROMLIB: Root node compatible: sun4v [0.80] Linux version 5.2.0-10808-g9637d517347e (mator@ttip) (gcc version 8.3.0 (Debian 8.3.0-7)) #1080 SMP Tue Jul 16 10:46:19 MSK 2019 [0.000386] printk: bootconsole [earlyprom0] enabled [0.000441] ARCH: SUN4V ... [0.451068] memory used by lock dependency info: 3855 kB [0.451104] per task-struct memory footprint: 1920 bytes [0.451140] [0.451167] | Locking API testsuite: [0.451194] [0.451244] | spin |wlock |rlock |mutex | wsem | rsem | [0.451294] -- [0.451350] A-A deadlock: ok | ok | ok | ok | ok | ok | ok | [0.454281] A-B-B-A deadlock: ok | ok | ok | ok | ok | ok | ok | [0.457443] A-B-B-C-C-A deadlock: ok | ok | ok | ok | ok | ok | ok | [0.460744] A-B-C-A-B-C deadlock: ok | ok | ok | ok | ok | ok | ok | [0.464032] A-B-B-C-C-D-D-A deadlock: ok | ok | ok | ok | ok | ok | ok | [0.467545] A-B-C-D-B-D-D-A deadlock: ok | ok | ok | ok | ok | ok | ok | [0.471009] A-B-C-D-B-C-D-A deadlock: ok | ok | ok | ok | ok | ok | ok | [0.474475] double unlock: ok | ok | ok | ok | ok | ok | ok | [0.477425] initialize held: ok | ok | ok | ok | ok | ok | ok | [0.480301] -- [0.480352] recursive read-lock: | ok | | ok | [0.481247]recursive read-lock #2: | ok | | ok | [0.482120] mixed read-write-lock: | ok | | ok | [0.482998] mixed write-read-lock: | ok | | ok | [0.483878] mixed read-lock/lock-write ABBA: |FAILED| | ok | [0.484755]mixed read-lock/lock-read ABBA: | ok | | ok | [0.485676] mixed write-lock/lock-write ABBA: | ok | | ok | [0.486597] -- ` -- You are receiving this mail because: You are watching the assignee of the bug.
[Bug 203647] Locking API testsuite fails "mixed read-lock/lock-write ABBA" rlock on kernels >=4.14.x
https://bugzilla.kernel.org/show_bug.cgi?id=203647
Michael Ellerman (mich...@ellerman.id.au) changed:
What|Removed |Added
Status|NEW |RESOLVED
CC||mich...@ellerman.id.au
Resolution|--- |DOCUMENTED
--- Comment #6 from Michael Ellerman (mich...@ellerman.id.au) ---
This appears to be working as expected, which I admit is a little confusing.
The key thing is that at the end you see, eg:
[0.179788] Good, all 261 testcases passed! |
See the commit that added the test:
https://git.kernel.org/torvalds/c/e91498589746
locking/lockdep/selftests: Add mixed read-write ABBA tests
Currently lockdep has limited support for recursive readers, add a few
mixed read-write ABBA selftests to show the extend of these
limitations.
And in the code:
print_testname("mixed read-lock/lock-write ABBA");
pr_cont(" |");
dotest(rlock_ABBA1, FAILURE, LOCKTYPE_RWLOCK);
#ifdef CONFIG_PROVE_LOCKING
/*
* Lockdep does indeed fail here, but there's nothing we can do about
* that now. Don't kill lockdep for it.
*/
unexpected_testcase_failures--;
#endif
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[Bug 203647] Locking API testsuite fails "mixed read-lock/lock-write ABBA" rlock on kernels >=4.14.x
https://bugzilla.kernel.org/show_bug.cgi?id=203647 --- Comment #5 from Erhard F. (erhar...@mailbox.org) --- Created attachment 282841 --> https://bugzilla.kernel.org/attachment.cgi?id=282841=edit kernel .config (5.1.3, G5 11,2) -- You are receiving this mail because: You are watching the assignee of the bug.
[Bug 203647] Locking API testsuite fails "mixed read-lock/lock-write ABBA" rlock on kernels >=4.14.x
https://bugzilla.kernel.org/show_bug.cgi?id=203647 --- Comment #4 from Erhard F. (erhar...@mailbox.org) --- Created attachment 282839 --> https://bugzilla.kernel.org/attachment.cgi?id=282839=edit dmesg (4.9.177, G5 11,2) -- You are receiving this mail because: You are watching the assignee of the bug.
[Bug 203647] Locking API testsuite fails "mixed read-lock/lock-write ABBA" rlock on kernels >=4.14.x
https://bugzilla.kernel.org/show_bug.cgi?id=203647 --- Comment #3 from Erhard F. (erhar...@mailbox.org) --- Created attachment 282837 --> https://bugzilla.kernel.org/attachment.cgi?id=282837=edit dmesg (4.14.120, G5 11,2) -- You are receiving this mail because: You are watching the assignee of the bug.
[Bug 203647] Locking API testsuite fails "mixed read-lock/lock-write ABBA" rlock on kernels >=4.14.x
https://bugzilla.kernel.org/show_bug.cgi?id=203647 --- Comment #2 from Erhard F. (erhar...@mailbox.org) --- Created attachment 282835 --> https://bugzilla.kernel.org/attachment.cgi?id=282835=edit dmesg (4.19.44, G5 11,2) -- You are receiving this mail because: You are watching the assignee of the bug.
[Bug 203647] Locking API testsuite fails "mixed read-lock/lock-write ABBA" rlock on kernels >=4.14.x
https://bugzilla.kernel.org/show_bug.cgi?id=203647 --- Comment #1 from Erhard F. (erhar...@mailbox.org) --- Created attachment 282833 --> https://bugzilla.kernel.org/attachment.cgi?id=282833=edit dmesg (5.0.17, G5 11,2) -- You are receiving this mail because: You are watching the assignee of the bug.
