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Date: Mon, 3 Aug 2015 15:33:02 +0530 From: Vineet Gupta <Vineet.Gupta1@...opsys.com> To: "Peter Zijlstra (Intel)" <peterz@...radead.org> CC: lkml <linux-kernel@...r.kernel.org>, <arc-linux-dev@...opsys.com>, Vineet Gupta <Vineet.Gupta1@...opsys.com> Subject: [PATCH 0/6] ARC: spinlocks/atomics rework Hi Peter, Just running this by you for quick eye balling and also as FYI. The PREFETCHW workaround for llock/scond livelock was not sufficient after all and we had to do some work there. Extending testing of quad core FPGA builds shows things pretty stable, whereas w/o patches some of the LTP tests (shm_open/23-1) would cause the system to go bonkers. I need to send this to Linus 4.2-rcx so will appreicate if you could take a quick peek. Thx, -Vineet Vineet Gupta (6): Revert "ARCv2: STAR 9000837815 workaround hardware exclusive transactions livelock" ARC: refactor atomic inline asm operands with symbolic names ARC: LLOCK/SCOND based spin_lock ARC: LLOCK/SCOND based rwlock ARCv2: spinlock/rwlock/atomics: Delayed retry of failed SCOND with exponential backoff ARCv2: spinlock/rwlock: Reset retry delay when starting a new spin-wait cycle arch/arc/Kconfig | 5 + arch/arc/include/asm/atomic.h | 113 +++++-- arch/arc/include/asm/spinlock.h | 551 +++++++++++++++++++++++++++++++++- arch/arc/include/asm/spinlock_types.h | 2 + arch/arc/kernel/setup.c | 4 + 5 files changed, 636 insertions(+), 39 deletions(-) -- 1.9.1 -- 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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