Messages in this thread | | | From | Vineet Gupta <> | Subject | [PATCH 0/6] ARC: spinlocks/atomics rework | Date | Mon, 3 Aug 2015 15:33:02 +0530 |
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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
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