From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f180.google.com (mail-wi0-f180.google.com [209.85.212.180]) by kanga.kvack.org (Postfix) with ESMTP id 5B7AF6B0073 for ; Wed, 26 Feb 2014 03:14:37 -0500 (EST) Received: by mail-wi0-f180.google.com with SMTP id hm4so1796678wib.1 for ; Wed, 26 Feb 2014 00:14:36 -0800 (PST) Received: from szxga03-in.huawei.com (szxga03-in.huawei.com. [119.145.14.66]) by mx.google.com with ESMTPS id fq5si9677083wic.50.2014.02.26.00.14.31 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Wed, 26 Feb 2014 00:14:36 -0800 (PST) Message-ID: <530DA208.2080109@huawei.com> Date: Wed, 26 Feb 2014 16:12:56 +0800 From: Xishi Qiu MIME-Version: 1.0 Subject: Re: mm: OS boot failed when set command-line kmemcheck=1 References: <5304558F.9050605@huawei.com> <53047AE6.4060403@huawei.com> In-Reply-To: Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: David Rientjes Cc: Robert Richter , Peter Zijlstra , Stephane Eranian , Pekka Enberg , Vegard Nossum , Linux MM , LKML On 2014/2/20 6:24, David Rientjes wrote: > On Wed, 19 Feb 2014, Xishi Qiu wrote: > >> Here is a warning, I don't whether it is relative to my hardware. >> If set "kmemcheck=1 nowatchdog", it can boot. >> >> code: >> ... >> pte = kmemcheck_pte_lookup(address); >> if (!pte) >> return false; >> >> WARN_ON_ONCE(in_nmi()); >> >> if (error_code & 2) >> ... >> >> log: >> [ 10.920683] WARNING: CPU: 0 PID: 1 at arch/x86/mm/kmemcheck/kmemcheck.c:640 k >> memcheck_fault+0xb1/0xc0() >> [ 10.920684] Modules linked in: >> [ 10.920686] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.14.0-rc3-0.1-default+ >> #3 >> [ 10.920687] Hardware name: Huawei Technologies Co., Ltd. Tecal RH2285 V2-24S/ >> BC11SRSC1, BIOS RMISV055 02/02/2013 >> [ 10.920690] 0000000000000280 ffff88085f807678 ffffffff814ca491 ffff88085f807 >> 6b8 >> [ 10.920693] ffffffff8104ce97 0000000000000000 ffff88085f807838 ffff88085f420 >> 5d4 >> [ 10.920695] 0000000000000000 0000000000000000 ffff88085f4205d4 ffff88085f807 >> 6c8 >> [ 10.920695] Call Trace: >> [ 10.920701] [] dump_stack+0x6a/0x79 >> [ 10.920705] [] warn_slowpath_common+0x87/0xb0 >> [ 10.920707] [] warn_slowpath_null+0x15/0x20 >> [ 10.920710] [] kmemcheck_fault+0xb1/0xc0 >> [ 10.920714] [] __do_page_fault+0x39b/0x4c0 >> [ 10.920718] [] ? put_dec+0x72/0x90 >> [ 10.920720] [] ? number+0x33a/0x360 >> [ 10.920723] [] do_page_fault+0x9/0x10 >> [ 10.920726] [] page_fault+0x22/0x30 >> [ 10.920731] [] ? vt_console_print+0x8c/0x400 >> [ 10.920733] [] ? vt_console_print+0x6c/0x400 >> [ 10.920737] [] ? msg_print_text+0x18b/0x1f0 >> [ 10.920739] [] call_console_drivers+0xc1/0xe0 >> [ 10.920741] [] console_unlock+0x236/0x280 >> [ 10.920744] [] vprintk_emit+0x2b5/0x450 >> [ 10.920746] [] ? kmemcheck_fault+0xb1/0xc0 >> [ 10.920748] [] printk+0x4a/0x4c >> [ 10.920750] [] ? kmemcheck_fault+0xb1/0xc0 >> [ 10.920753] [] warn_slowpath_common+0x3e/0xb0 >> [ 10.920755] [] warn_slowpath_null+0x15/0x20 >> [ 10.920757] [] kmemcheck_fault+0xb1/0xc0 >> [ 10.920760] [] __do_page_fault+0x39b/0x4c0 >> [ 10.920763] [] do_page_fault+0x9/0x10 >> [ 10.920765] [] page_fault+0x22/0x30 >> [ 10.920769] [] ? x86_perf_event_update+0x2/0x70 >> [ 10.920772] [] ? intel_pmu_save_and_restart+0x11/0x50 >> [ 10.920774] [] intel_pmu_handle_irq+0x142/0x3a0 >> [ 10.920777] [] perf_event_nmi_handler+0x35/0x60 >> [ 10.920779] [] nmi_handle+0x63/0x150 >> [ 10.920782] [] default_do_nmi+0x63/0x290 >> [ 10.920784] [] do_nmi+0xa8/0xe0 >> [ 10.920786] [] end_repeat_nmi+0x1e/0x2e >> [ 10.920789] [] ? retint_signal+0x78/0x78 >> [ 10.920791] [] ? retint_signal+0x78/0x78 >> [ 10.920793] [] ? retint_signal+0x78/0x78 >> [ 10.920799] <> <#DB> [] ? acpi_ns_walk_namespace+0x >> 98/0x251 >> > > I added some perf events and kmemcheck people to the cc list. This > appears to happen during an NMI when faulting in struct perf_sample_data > data. > Hi David, Can you try our config or if you can send us your config? Thanks, Xishi Qiu ... CONFIG_HAVE_ARCH_KMEMCHECK=y CONFIG_KMEMCHECK=y # CONFIG_KMEMCHECK_DISABLED_BY_DEFAULT is not set # CONFIG_KMEMCHECK_ENABLED_BY_DEFAULT is not set CONFIG_KMEMCHECK_ONESHOT_BY_DEFAULT=y CONFIG_KMEMCHECK_QUEUE_SIZE=64 CONFIG_KMEMCHECK_SHADOW_COPY_SHIFT=5 CONFIG_KMEMCHECK_PARTIAL_OK=y # CONFIG_KMEMCHECK_BITOPS_OK is not set ... > . > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org