From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Mon, 12 Nov 2018 19:28:11 +0100 (CET) Received: from mail-pg1-x543.google.com ([IPv6:2607:f8b0:4864:20::543]:39615 "EHLO mail-pg1-x543.google.com" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S23992773AbeKLS1RAHD1p (ORCPT ); Mon, 12 Nov 2018 19:27:17 +0100 Received: by mail-pg1-x543.google.com with SMTP id r9-v6so4431355pgv.6 for ; Mon, 12 Nov 2018 10:27:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Z+fNEzOvGtu7UZFhCEIQ8uoVjOxFwpPILN5pzazqNYk=; b=eXr6js0mdxBQXDsYoP+dpGM05tDLjEqyHTGRhiOIULp8cnhmCXXktIgW8uezqg9ePK wVabda9zlcNHOXnd4xrUL7y/qGPvD3LORin0hioaX/oYI39lrop8fAjEQALwFCK9UNaM Enw29nwR5bw1mTGJXMldXQvFe9C5yvoDao0KM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Z+fNEzOvGtu7UZFhCEIQ8uoVjOxFwpPILN5pzazqNYk=; b=UUUH8aHS4fQCsiV7B151/dY1QV+Zh/zpRDnxTTTHzKSHeEi8BvBHizwfxTMoGcyG0m rWKm69DmxrNIRNM9BiAwCO4RG5ROH5p4SBr4nvU3hrYnjKQ1Dpjdsjse65Ua24cnvIE8 olbRZG0kwtwM5WBywMjDINLrwrgeCRibhSKogpHI0JpYSi0ZX4YcWDw9INbRRAKSFNNb EEAoVrzbj4xoCQp/3jCvHOGB4I3eTE8MDORmxkD1aVLncj4Dp8UvlkWP9rmL7oTP3+Lx UH1O5s/dz1weA4ulXSm1C/DsN+L+OhMo50juTRsTmLc3wrf1pofKbeu+/D4E56NiKkez Kdqg== X-Gm-Message-State: AGRZ1gIdxEEOgNVTGMSFO3dC7MC9urba80Bb1hQ7yLnTckVZvyRFuDOn HF1N7zV3I4Ghsk/3UeYAvY4XQw== X-Google-Smtp-Source: AJdET5e5/WkAuI8mTOdhvf1T6zEObtJHy7y0EHk3Q6guTcO9BgOxiHnQib5SZuhWLZjVMV7KN5Oidg== X-Received: by 2002:a63:24c2:: with SMTP id k185mr1679288pgk.406.1542047236123; Mon, 12 Nov 2018 10:27:16 -0800 (PST) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:1:c8e0:70d7:4be7:a36]) by smtp.gmail.com with ESMTPSA id o86-v6sm18813100pfk.8.2018.11.12.10.27.14 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 12 Nov 2018 10:27:15 -0800 (PST) From: Douglas Anderson To: Jason Wessel , Daniel Thompson Cc: kgdb-bugreport@lists.sourceforge.net, Peter Zijlstra , Douglas Anderson , linux-mips@linux-mips.org, linux-sh@vger.kernel.org, Borislav Petkov , linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, Catalin Marinas , James Hogan , linux-hexagon@vger.kernel.org, x86@kernel.org, Vineet Gupta , Thomas Gleixner , Michal Hocko , Ralf Baechle , linux-snps-arc@lists.infradead.org, Andrew Morton , "H. Peter Anvin" , Yoshinori Sato , Benjamin Herrenschmidt , Will Deacon , Paul Burton , Ingo Molnar , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Huang Ying , "David S. Miller" , Rich Felker , Michael Ellerman , Mike Rapoport , Paul Mackerras , Richard Kuo , linuxppc-dev@lists.ozlabs.org Subject: [PATCH v4 0/4] kgdb: Fix kgdb_roundup_cpus() Date: Mon, 12 Nov 2018 10:26:54 -0800 Message-Id: <20181112182659.245726-1-dianders@chromium.org> X-Mailer: git-send-email 2.19.1.930.g4563a0d9d0-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 67254 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: dianders@chromium.org Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips This series was originally part of the series ("serial: Finish kgdb on qcom_geni; fix many lockdep splats w/ kgdb") but it made sense to split it up. It's believed that dropping into kgdb should be more robust once these patches are applied. Changes in v4: - Removed smp_mb() calls. - Also clear out .debuggerinfo. - Also clear out .debuggerinfo and .task for the master. - Remove clearing out in kdb_stub for offline CPUs; it's now redundant. Changes in v3: - No separate init call. - Don't round up the CPU that is doing the rounding up. - Add "#ifdef CONFIG_SMP" to match the rest of the file. - Updated desc saying we don't solve the "failed to roundup" case. - Document the ignored parameter. - Don't round up a CPU that failed rounding up before new for v3. - Don't back trace on a cpu that didn't round up new for v3. Changes in v2: - Removing irq flags separated from fixing lockdep splat. - Don't use smp_call_function (Daniel). Douglas Anderson (4): kgdb: Remove irq flags from roundup kgdb: Fix kgdb_roundup_cpus() for arches who used smp_call_function() kgdb: Don't round up a CPU that failed rounding up before kdb: Don't back trace on a cpu that didn't round up arch/arc/kernel/kgdb.c | 10 ++---- arch/arm/kernel/kgdb.c | 12 ------- arch/arm64/kernel/kgdb.c | 12 ------- arch/hexagon/kernel/kgdb.c | 32 ------------------- arch/mips/kernel/kgdb.c | 9 +----- arch/powerpc/kernel/kgdb.c | 6 ++-- arch/sh/kernel/kgdb.c | 12 ------- arch/sparc/kernel/smp_64.c | 2 +- arch/x86/kernel/kgdb.c | 9 ++---- include/linux/kgdb.h | 22 ++++++++----- kernel/debug/debug_core.c | 56 ++++++++++++++++++++++++++++++++- kernel/debug/debug_core.h | 1 + kernel/debug/kdb/kdb_bt.c | 11 ++++++- kernel/debug/kdb/kdb_debugger.c | 7 ----- 14 files changed, 89 insertions(+), 112 deletions(-) -- 2.19.1.930.g4563a0d9d0-goog