On Tue, Oct 27, 2020 at 11:29:35AM +0000, Chris Wilson wrote: > Quoting tip-bot2 for Peter Zijlstra (2020-10-07 17:20:13) > > The following commit has been merged into the locking/core branch of tip: > > > > Commit-ID: 24d5a3bffef117ed90685f285c6c9d2faa3a02b4 > > Gitweb: https://git.kernel.org/tip/24d5a3bffef117ed90685f285c6c9d2faa3a02b4 > > Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > AuthorDate: Wed, 30 Sep 2020 11:49:37 +02:00 > > Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > CommitterDate: Wed, 07 Oct 2020 18:14:17 +02:00 > > > > lockdep: Fix usage_traceoverflow > > > > Basically print_lock_class_header()'s for loop is out of sync with the > > the size of of ->usage_traces[]. > > We're hitting a problem, > > $ cat /proc/lockdep_stats > > upon boot generates: > > [ 29.465702] DEBUG_LOCKS_WARN_ON(debug_atomic_read(nr_unused_locks) != nr_unused) > [ 29.465716] WARNING: CPU: 0 PID: 488 at kernel/locking/lockdep_proc.c:256 lockdep_stats_show+0xa33/0xac0 > > that bisected to this patch. Only just completed the bisection and > thought you would like a heads up. Oh hey, that's 'curious'... it does indeed trivially reproduce, let me have a poke.
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