Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752562AbbHQHrE (ORCPT ); Mon, 17 Aug 2015 03:47:04 -0400 Received: from smtprelay.synopsys.com ([198.182.60.111]:35001 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754487AbbHQHrA convert rfc822-to-8bit (ORCPT ); Mon, 17 Aug 2015 03:47:00 -0400 From: Vineet Gupta To: "Peter Zijlstra (Intel)" , Thomas Gleixner CC: Michel Lespinasse , "arc-linux-dev@synopsys.com" , lkml Subject: Re: [PATCH 0/4] ARC futex fixes Thread-Topic: [PATCH 0/4] ARC futex fixes Thread-Index: AQHQ0ERsYUGFfnqUukq5DHs412XHng== Date: Mon, 17 Aug 2015 07:46:52 +0000 Message-ID: References: <1438864523-31340-1-git-send-email-vgupta@synopsys.com> Accept-Language: en-US, en-IN Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.12.197.191] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1267 Lines: 42 On Thursday 06 August 2015 06:05 PM, Vineet Gupta wrote: Hi Thomas/Peter, Of late I've been debugging a seeming lost wakeup when running a specific EEMBC Multibench workload (4M-check -w4) on a quad core HS38 config on FPGA CONFIG_SMP, CONFIG_PREEMPT. I've yet to nail that issue down, but in the process found some deficinecies in ARC futex backend. Can you please take a quick look and shout if there's something wrong there. The futex backend for ARC, despite it's age, only recently started getting real testing due to recent switch to NPTL based userland (uClibc). Thx, -Vineet Vineet Gupta (4): ARC: add barriers to futex code ARC: futex cosmetics ARC: make futex_atomic_cmpxchg_inatomic() return bimodal ARC: Enable HAVE_FUTEX_CMPXCHG arch/arc/Kconfig | 1 + arch/arc/include/asm/futex.h | 44 +++++++++++++++++++++++++------------------- 2 files changed, 26 insertions(+), 19 deletions(-) Hi Thomas, Could u please take a look at these patches when u get a chance ? Thx, -Vineet -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/