Message ID | 20230519101840.v5.5.I654063e53782b11d53e736a8ad4897ffd207406a@changeid (mailing list archive) |
---|---|
State | Handled Elsewhere, archived |
Headers | show
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b=ExaumWHpvT44oM5piZ7vXTOSpN3asI5SBMdooT6ARa9dNSbmsJYKIIz0cxcWaKWnqu MNsVwZEUq/uR5Dt0Umhztpwxqtf3qsyzssyNjCDZvDiR2Ubx49y+4Q74sDau79NXVAXb vkcKvpQhjNB5nnfwwDmsaeEW6BCNouSuj+sGXfeGVeCKFgEclnyL/rmpO9TAFjlItfQf q9kXvSng44C/uUkNkqHYoOUmCLSQ6fEg4Osgz521aDCHEVg59XblI3bqRZq4uOSRy8cm zV2Zg4AoNKsltfLsgZ12/o4E+Gw+NutKOr4oKdA21pehZXfqAYFc8mckycb5ZGzgqxVr DiOQ== X-Gm-Message-State: AC+VfDzMgd3wu0if6Ws4hlLenUrEFZGvRUtEK5C0qMlmlmlcte8/7P3T 0X2eKL3xyzL69cDs9cw4ycVX8w== X-Google-Smtp-Source: ACHHUZ7LqONQqbo1f32uROMOmBD1YwxsC0hUaPEyZAYzC5eD1qH0xMLrKy1PKFruL4ixUcNA0i2quA== X-Received: by 2002:a17:90a:8b0e:b0:253:8796:3322 with SMTP id y14-20020a17090a8b0e00b0025387963322mr1959543pjn.27.1684516851906; Fri, 19 May 2023 10:20:51 -0700 (PDT) Received: from tictac2.mtv.corp.google.com ([2620:15c:9d:2:9b89:2dd0:d160:429d]) by smtp.gmail.com with ESMTPSA id gj19-20020a17090b109300b0024e4f169931sm1763835pjb.2.2023.05.19.10.20.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 May 2023 10:20:51 -0700 (PDT) From: Douglas Anderson <dianders@chromium.org> To: Petr Mladek <pmladek@suse.com>, Andrew Morton <akpm@linux-foundation.org> Subject: [PATCH v5 05/18] watchdog/perf: Ensure CPU-bound context when creating hardlockup detector event Date: Fri, 19 May 2023 10:18:29 -0700 Message-ID: <20230519101840.v5.5.I654063e53782b11d53e736a8ad4897ffd207406a@changeid> X-Mailer: git-send-email 2.40.1.698.g37aff9b760-goog In-Reply-To: <20230519101840.v5.18.Ia44852044cdcb074f387e80df6b45e892965d4a1@changeid> References: <20230519101840.v5.18.Ia44852044cdcb074f387e80df6b45e892965d4a1@changeid> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List <linuxppc-dev.lists.ozlabs.org> List-Unsubscribe: <https://lists.ozlabs.org/options/linuxppc-dev>, <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe> List-Archive: <http://lists.ozlabs.org/pipermail/linuxppc-dev/> List-Post: <mailto:linuxppc-dev@lists.ozlabs.org> List-Help: <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help> List-Subscribe: <https://lists.ozlabs.org/listinfo/linuxppc-dev>, <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe> Cc: Mark Rutland <mark.rutland@arm.com>, Ian Rogers <irogers@google.com>, ito-yuichi@fujitsu.com, Lecopzer Chen <lecopzer.chen@mediatek.com>, kgdb-bugreport@lists.sourceforge.net, ricardo.neri@intel.com, Stephane Eranian <eranian@google.com>, Douglas Anderson <dianders@chromium.org>, Guenter Roeck <groeck@chromium.org>, sparclinux@vger.kernel.org, Will Deacon <will@kernel.org>, Daniel Thompson <daniel.thompson@linaro.org>, Andi Kleen <ak@linux.intel.com>, Marc Zyngier <maz@kernel.org>, Chen-Yu Tsai <wens@csie.org>, Matthias Kaehlcke <mka@chromium.org>, Catalin Marinas <catalin.marinas@arm.com>, Masayoshi Mizuma <msys.mizuma@gmail.com>, ravi.v.shankar@intel.com, Tzung-Bi Shih <tzungbi@chromium.org>, npiggin@gmail.com, Stephen Boyd <swboyd@chromium.org>, Pingfan Liu <kernelfans@gmail.com>, linux-arm-kernel@lists.infradead.org, Sumit Garg <sumit.garg@linaro.org>, Randy Dunlap <rdunlap@infradead.org>, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linuxppc-dev@lists.ozla bs.org, davem@davemloft.net Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" <linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org> |
Series |
watchdog/hardlockup: Add the buddy hardlockup detector
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expand
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diff --git a/kernel/watchdog_hld.c b/kernel/watchdog_hld.c index 1e8a49dc956e..2125b09e09d7 100644 --- a/kernel/watchdog_hld.c +++ b/kernel/watchdog_hld.c @@ -165,10 +165,16 @@ static void watchdog_overflow_callback(struct perf_event *event, static int hardlockup_detector_event_create(void) { - unsigned int cpu = smp_processor_id(); + unsigned int cpu; struct perf_event_attr *wd_attr; struct perf_event *evt; + /* + * Preemption is not disabled because memory will be allocated. + * Ensure CPU-locality by calling this in per-CPU kthread. + */ + WARN_ON(!is_percpu_thread()); + cpu = raw_smp_processor_id(); wd_attr = &wd_hw_attr; wd_attr->sample_period = hw_nmi_get_sample_period(watchdog_thresh);