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Thu, 19 Feb 2026 19:11:22 +0000 Date: Thu, 19 Feb 2026 19:11:21 +0000 Message-ID: <87cy20eeg6.wl-maz@kernel.org> From: Marc Zyngier To: Steven Rostedt Cc: Vincent Donnefort , mhiramat@kernel.org, mathieu.desnoyers@efficios.com, linux-trace-kernel@vger.kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, jstultz@google.com, qperret@google.com, will@kernel.org, aneesh.kumar@kernel.org, kernel-team@android.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH v12 00/30] Tracefs support for pKVM In-Reply-To: <20260219130220.063c8db3@gandalf.local.home> References: <20260219150307.14538-1-vdonnefort@google.com> <20260219130220.063c8db3@gandalf.local.home> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: rostedt@goodmis.org, vdonnefort@google.com, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, linux-trace-kernel@vger.kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, jstultz@google.com, qperret@google.com, will@kernel.org, aneesh.kumar@kernel.org, kernel-team@android.com, linux-kernel@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260219_111127_235729_60E23715 X-CRM114-Status: GOOD ( 26.53 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, 19 Feb 2026 18:02:20 +0000, Steven Rostedt wrote: > > On Thu, 19 Feb 2026 15:02:37 +0000 > Vincent Donnefort wrote: > > > The growing set of features supported by the hypervisor in protected > > mode necessitates debugging and profiling tools. Tracefs is the > > ideal candidate for this task: > > > > * It is simple to use and to script. > > > > * It is supported by various tools, from the trace-cmd CLI to the > > Android web-based perfetto. > > > > * The ring-buffer, where are stored trace events consists of linked > > pages, making it an ideal structure for sharing between kernel and > > hypervisor. > > > > This series first introduces a new generic way of creating remote events and > > remote buffers. Then it adds support to the pKVM hypervisor. > > > > So I finished my review of all the tracing patches, but I just realized > that there's likely going to be some major conflicts with changes in the > tracing tree that's going to happen against this series. > > To solve that, after -rc2 comes out, I'll apply the tracing portion of this > series to a branch in my tree directly on top of -rc2 and I will then use > that to base my changes for the next merge window. > > Then the arm/kvm folks could start with that branch and add the arm/KVM > portion of this series on top of it. This will prevent major merge > conflicts in linux-next. > > Does that sound OK? That works. Just send us a link to the branch after -rc2 and we'll get that sorted. Thanks, M. -- Jazz isn't dead. It just smells funny.