On Wed, 2014-07-16 at 12:24 -0700, tip-bot for Peter Zijlstra wrote: > Commit-ID: 4badad352a6bb202ec68afa7a574c0bb961e5ebc > Gitweb: http://git.kernel.org/tip/4badad352a6bb202ec68afa7a574c0bb961e5ebc > Author: Peter Zijlstra <pet...@infradead.org> > AuthorDate: Fri, 6 Jun 2014 19:53:16 +0200 > Committer: Ingo Molnar <mi...@kernel.org> > CommitDate: Wed, 16 Jul 2014 14:57:07 +0200 > > locking/mutex: Disable optimistic spinning on some architectures > > The optimistic spin code assumes regular stores and cmpxchg() play nice; > this is found to not be true for at least: parisc, sparc32, tile32, > metag-lock1, arc-!llsc and hexagon. > > There is further wreckage, but this in particular seemed easy to > trigger, so blacklist this. > > Opt in for known good archs. > > Signed-off-by: Peter Zijlstra <pet...@infradead.org> > Reported-by: Mikulas Patocka <mpato...@redhat.com> > Cc: David Miller <da...@davemloft.net> > Cc: Chris Metcalf <cmetc...@tilera.com> > Cc: James Bottomley <james.bottom...@hansenpartnership.com> > Cc: Vineet Gupta <vgu...@synopsys.com> > Cc: Jason Low <jason.l...@hp.com> > Cc: Waiman Long <waiman.l...@hp.com> > Cc: "James E.J. Bottomley" <j...@parisc-linux.org> > Cc: Paul McKenney <paul...@linux.vnet.ibm.com> > Cc: John David Anglin <dave.ang...@bell.net> > Cc: James Hogan <james.ho...@imgtec.com> > Cc: Linus Torvalds <torva...@linux-foundation.org> > Cc: Davidlohr Bueso <davidl...@hp.com> > Cc: sta...@vger.kernel.org > Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org> > Cc: Catalin Marinas <catalin.mari...@arm.com> > Cc: Russell King <li...@arm.linux.org.uk> > Cc: Will Deacon <will.dea...@arm.com> > Cc: linux-arm-ker...@lists.infradead.org > Cc: linux-kernel@vger.kernel.org > Cc: linuxppc-...@lists.ozlabs.org > Cc: sparcli...@vger.kernel.org > Link: > http://lkml.kernel.org/r/20140606175316.gv13...@laptop.programming.kicks-ass.net > Signed-off-by: Ingo Molnar <mi...@kernel.org>
Cc'ing stable: this issue was reported to begin after commit fb0527bd, so since v3.13. Thanks, Davidlohr -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
