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Fri, 20 May 2022 20:25:11 -0700 (PDT) Date: Sat, 21 May 2022 12:24:56 +0900 From: Hyeonggon Yoo <42.hyeyoo@gmail.com> To: Byungchul Park Cc: torvalds@linux-foundation.org, damien.lemoal@opensource.wdc.com, linux-ide@vger.kernel.org, adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, mingo@redhat.com, linux-kernel@vger.kernel.org, peterz@infradead.org, will@kernel.org, tglx@linutronix.de, rostedt@goodmis.org, joel@joelfernandes.org, sashal@kernel.org, daniel.vetter@ffwll.ch, chris@chris-wilson.co.uk, duyuyang@gmail.com, johannes.berg@intel.com, tj@kernel.org, tytso@mit.edu, willy@infradead.org, david@fromorbit.com, amir73il@gmail.com, bfields@fieldses.org, gregkh@linuxfoundation.org, kernel-team@lge.com, linux-mm@kvack.org, akpm@linux-foundation.org, mhocko@kernel.org, minchan@kernel.org, hannes@cmpxchg.org, vdavydov.dev@gmail.com, sj@kernel.org, jglisse@redhat.com, dennis@kernel.org, cl@linux.com, penberg@kernel.org, rientjes@google.com, vbabka@suse.cz, ngupta@vflare.org, linux-block@vger.kernel.org, paolo.valente@linaro.org, josef@toxicpanda.com, linux-fsdevel@vger.kernel.org, viro@zeniv.linux.org.uk, jack@suse.cz, jack@suse.com, jlayton@kernel.org, dan.j.williams@intel.com, hch@infradead.org, djwong@kernel.org, dri-devel@lists.freedesktop.org, airlied@linux.ie, rodrigosiqueiramelo@gmail.com, melissa.srw@gmail.com, hamohammed.sa@gmail.com Subject: Re: [PATCH RFC v6 02/21] dept: Implement Dept(Dependency Tracker) Message-ID: References: <1651652269-15342-1-git-send-email-byungchul.park@lge.com> <1651652269-15342-3-git-send-email-byungchul.park@lge.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1651652269-15342-3-git-send-email-byungchul.park@lge.com> X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 5D8FD200CF X-Rspam-User: Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=NTqXHE9U; spf=pass (imf03.hostedemail.com: domain of 42.hyeyoo@gmail.com designates 209.85.216.49 as permitted sender) smtp.mailfrom=42.hyeyoo@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Stat-Signature: o9ar4mpci41iyeir78jj6npycpfbcqf9 X-HE-Tag: 1653103502-267513 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, May 04, 2022 at 05:17:30PM +0900, Byungchul Park wrote: > CURRENT STATUS > +/* [...] > + * Ensure it has been called on ON/OFF transition. > + */ > +void dept_enirq_transition(unsigned long ip) > +{ > + struct dept_task *dt = dept_task(); > + unsigned long flags; > + > + if (unlikely(READ_ONCE(dept_stop) || in_nmi())) > + return; > + > + /* > + * IRQ ON/OFF transition might happen while Dept is working. > + * We cannot handle recursive entrance. Just ingnore it. > + * Only transitions outside of Dept will be considered. > + */ > + if (dt->recursive) > + return; > + > + flags = dept_enter(); > + > + enirq_update(ip); > + > + dept_exit(flags); > +} EXPORT_SYMBOL_GPL(dept_enirq_transition); ERROR: modpost: "dept_enirq_transition" [arch/x86/kvm/kvm-amd.ko] undefined! ERROR: modpost: "dept_enirq_transition" [arch/x86/kvm/kvm-intel.ko] undefined! This function needs to be exported for modules. Thanks. -- Thanks, Hyeonggon