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Sun, 22 Sep 2024 22:12:01 -0700 (PDT) Received: from localhost ([183.226.245.34]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-7db4b080b29sm12540607a12.33.2024.09.22.22.12.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Sep 2024 22:12:01 -0700 (PDT) From: chenqiwu X-Google-Original-From: chenqiwu Date: Mon, 23 Sep 2024 13:11:56 +0800 To: Oleg Nesterov Cc: "qiwu.chen" , corbet@lwn.net, mhocko@suse.com, jani.nikula@intel.com, akpm@linux-foundation.org, brauner@kernel.org, paulmck@kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 2/2] exit: dump current pt_regs info on global init exit Message-ID: <20240923051156.GA55819@rlk> References: <20240922095504.7182-1-qiwu.chen@transsion.com> <20240922095504.7182-2-qiwu.chen@transsion.com> <20240922125458.GA9426@redhat.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240922125458.GA9426@redhat.com> On Sun, Sep 22, 2024 at 02:54:59PM +0200, Oleg Nesterov wrote: > > Well, this means that show_regs() will be called twice if CONFIG_DEBUG_BUGVERBOSE > at least on x86, see dump_stack() in panic(). See also show_regs_if_on_stack() > in show_trace_log_lvl(). > > Not good... > Okay, I see. The dump_stack() is arch-dependent function, it doesn't call show_regs() on arm64. Do you have any suggestion where to dump regs without arch-dependence on task exiting flow? Thanks Qiwu