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Message-ID: <20090804082048.GA7433@elte.hu> Date: Tue, 4 Aug 2009 10:20:48 +0200 From: Ingo Molnar <mingo@...e.hu> To: Gautham R Shenoy <ego@...ibm.com> Cc: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org, tglx@...utronix.de, linux-tip-commits@...r.kernel.org Subject: Re: [tip:core/rcu] rcu: Add diagnostic check for a possible CPU-hotplug race * Gautham R Shenoy <ego@...ibm.com> wrote: > On Mon, Aug 03, 2009 at 09:04:58AM +0200, Ingo Molnar wrote: > > [ 0.010000] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar > > [ 0.010000] ... MAX_LOCKDEP_SUBCLASSES: 8 > > [ 0.010000] ... MAX_LOCK_DEPTH: 48 > > [ 0.010000] ... MAX_LOCKDEP_KEYS: 8191 > > [ 0.010000] ... CLASSHASH_SIZE: 4096 > > [ 0.010000] ... MAX_LOCKDEP_ENTRIES: 16384 > > [ 0.010000] ... MAX_LOCKDEP_CHAINS: 32768 > > [ 0.010000] ... CHAINHASH_SIZE: 16384 > > [ 0.010000] memory used by lock dependency info: 5823 kB > > [ 0.010000] per task-struct memory footprint: 1920 bytes > > [ 0.010000] ------------------------ > > [ 0.010000] | Locking API testsuite: > > [ 0.010000] ---------------------------------------------------------------------------- > > [ 0.010000] | spin |wlock |rlock |mutex | wsem | rsem | > > [ 0.010000] -------------------------------------------------------------------------- > > [ 0.010000] A-A deadlock:failed|failed| ok |failed|failed|failed| > > [ 0.010000] A-B-B-A deadlock:failed|failed| ok |failed|failed|failed| > > [ 0.010000] A-B-B-C-C-A deadlock:failed|failed| ok |failed|failed|failed| > > [ 0.010000] A-B-C-A-B-C deadlock:failed|failed| ok |failed|failed|failed| > > [ 0.010000] A-B-B-C-C-D-D-A deadlock:failed|failed| ok |failed|failed|failed| > > [ 0.010000] A-B-C-D-B-D-D-A deadlock:failed|failed| ok |failed|failed|failed| > > [ 0.010000] A-B-C-D-B-C-D-A deadlock:failed|failed| ok |failed|failed|failed| > > [ 0.010000] double unlock: ok | ok | ok | ok | ok | ok | > > [ 0.010000] initialize held: ok | ok | ok | ok | ok | ok | > > [ 0.010000] bad unlock order: ok | ok | ok | ok | ok | ok | > > [ 0.010000] -------------------------------------------------------------------------- > > [ 0.010000] recursive read-lock: | ok | |failed| > > [ 0.010000] recursive read-lock #2: | ok | |failed| > > [ 0.010000] mixed read-write-lock: |failed| |failed| > > [ 0.010000] mixed write-read-lock: |failed| |failed| > > [ 0.010000] -------------------------------------------------------------------------- > > [ 0.010000] hard-irqs-on + irq-safe-A/12:failed|failed| ok | > > [ 0.010000] soft-irqs-on + irq-safe-A/12:failed|failed| ok | > > [ 0.010000] hard-irqs-on + irq-safe-A/21:failed|failed| ok | > > [ 0.010000] soft-irqs-on + irq-safe-A/21:failed|failed| ok | > > [ 0.010000] sirq-safe-A => hirqs-on/12:failed|failed| ok | > > [ 0.010000] sirq-safe-A => hirqs-on/21:failed|failed| ok | > > [ 0.010000] hard-safe-A + irqs-on/12:failed|failed| ok | > > [ 0.010000] soft-safe-A + irqs-on/12:failed|failed| ok | > > [ 0.010000] hard-safe-A + irqs-on/21:failed|failed| ok | > > [ 0.010000] soft-safe-A + irqs-on/21:failed|failed| ok | > > [ 0.010000] hard-safe-A + unsafe-B #1/123:failed|failed| ok | > > [ 0.010000] soft-safe-A + unsafe-B #1/123:failed|failed| ok | > > [ 0.010000] hard-safe-A + unsafe-B #1/132:failed|failed| ok | > > [ 0.010000] soft-safe-A + unsafe-B #1/132:failed|failed| ok | > > [ 0.010000] hard-safe-A + unsafe-B #1/213:failed|failed| ok | > > [ 0.010000] soft-safe-A + unsafe-B #1/213:failed|failed| ok | > > [ 0.010000] hard-safe-A + unsafe-B #1/231:failed|failed| ok | > > [ 0.010000] soft-safe-A + unsafe-B #1/231:failed|failed| ok | > > [ 0.010000] hard-safe-A + unsafe-B #1/312:failed|failed| ok | > > [ 0.010000] soft-safe-A + unsafe-B #1/312:failed|failed| ok | > > [ 0.010000] hard-safe-A + unsafe-B #1/321:failed|failed| ok | > > [ 0.010000] soft-safe-A + unsafe-B #1/321:failed|failed| ok | > > [ 0.010000] hard-safe-A + unsafe-B #2/123:failed|failed| ok | > > [ 0.010000] soft-safe-A + unsafe-B #2/123:failed|failed| ok | > > [ 0.010000] hard-safe-A + unsafe-B #2/132:failed|failed| ok | > > [ 0.010000] soft-safe-A + unsafe-B #2/132:failed|failed| ok | > > [ 0.010000] hard-safe-A + unsafe-B #2/213:failed|failed| ok | > > [ 0.010000] soft-safe-A + unsafe-B #2/213:failed|failed| ok | > > [ 0.010000] hard-safe-A + unsafe-B #2/231:failed|failed| ok | > > [ 0.010000] soft-safe-A + unsafe-B #2/231:failed|failed| ok | > > [ 0.010000] hard-safe-A + unsafe-B #2/312:failed|failed| ok | > > [ 0.010000] soft-safe-A + unsafe-B #2/312:failed|failed| ok | > > [ 0.010000] hard-safe-A + unsafe-B #2/321:failed|failed| ok | > > [ 0.010000] soft-safe-A + unsafe-B #2/321:failed|failed| ok | > > [ 0.010000] hard-irq lock-inversion/123:failed|failed| ok | > > [ 0.010000] soft-irq lock-inversion/123:failed|failed| ok | > > [ 0.010000] hard-irq lock-inversion/132:failed|failed| ok | > > [ 0.010000] soft-irq lock-inversion/132:failed|failed| ok | > > [ 0.010000] hard-irq lock-inversion/213:failed|failed| ok | > > [ 0.010000] soft-irq lock-inversion/213:failed|failed| ok | > > [ 0.010000] hard-irq lock-inversion/231:failed|failed| ok | > > [ 0.010000] soft-irq lock-inversion/231:failed|failed| ok | > > [ 0.010000] hard-irq lock-inversion/312:failed|failed| ok | > > [ 0.010000] soft-irq lock-inversion/312:failed|failed| ok | > > [ 0.010000] hard-irq lock-inversion/321:failed|failed| ok | > > [ 0.010000] soft-irq lock-inversion/321:failed|failed| ok | > > [ 0.010000] hard-irq read-recursion/123: ok | > > [ 0.010000] soft-irq read-recursion/123: ok | > > [ 0.010000] hard-irq read-recursion/132: ok | > > [ 0.010000] soft-irq read-recursion/132: ok | > > [ 0.010000] hard-irq read-recursion/213: ok | > > [ 0.010000] soft-irq read-recursion/213: ok | > > [ 0.010000] hard-irq read-recursion/231: ok | > > [ 0.010000] soft-irq read-recursion/231: ok | > > [ 0.010000] hard-irq read-recursion/312: ok | > > [ 0.010000] soft-irq read-recursion/312: ok | > > [ 0.010000] hard-irq read-recursion/321: ok | > > [ 0.010000] soft-irq read-recursion/321: ok | > > [ 0.010000] -------------------------------------------------------- > > [ 0.010000] 133 out of 218 testcases failed, as expected. | > > [ 0.010000] ---------------------------------------------------- > > Hmm.. I tried to reproduce this on a similar 2 CPU machine running > linux-2.6.31-rc5-tip. However, I couldn't reproduce this WARN_ON. > > That aside, in my case, all the 218 lockdep test cases passed, > while this bootlog shows quite a few failures. > So, wondering if I am testing the right kernel version. hm, maybe i sent the wrong config. I'll try to reproduce it once more and will double check. Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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