From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D45C2426D26; Tue, 31 Mar 2026 18:03:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=216.40.44.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774980191; cv=none; b=aP2WaePraqMYR6riWsPkF7z1NzUpQJTum1Sr5QjDvxa8UU9kmqjRAXgUEYcLjebihvTOmU2mMUwGoXJojAvlBwQOeMd3q2l4eeUyQOC06C0UDJDw4nZ6lExmfSnZgOXMElr0nNv5Sy58sC4W3XY8UqwCMpMa0h+fxkmk4HZ5i3c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774980191; c=relaxed/simple; bh=IEIsKpVdgW+CezsNR1X6h4M0lrLA9DsVcyRqJD0xbXs=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Fvd4zirD8mj2o9nuRkNLYHJkOMIm+iNxZ2mHihoKsK5mX8INF7bR0Fe5/1MD3w4UoTSkjON4JFw3YwLXN9fC9H+xbyXVz4zoFQAEaZMRw03Ong4oYooBlxIUZdjF8/irdhPT890tXpJtMY9foBZ54MWaaaaCM0ZdDDestH9y3FU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goodmis.org; spf=pass smtp.mailfrom=goodmis.org; arc=none smtp.client-ip=216.40.44.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goodmis.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=goodmis.org Received: from omf06.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id D37EA160374; Tue, 31 Mar 2026 18:03:01 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: rostedt@goodmis.org) by omf06.hostedemail.com (Postfix) with ESMTPA id 968C720015; Tue, 31 Mar 2026 18:02:59 +0000 (UTC) Date: Tue, 31 Mar 2026 14:03:57 -0400 From: Steven Rostedt To: Catalin Marinas Cc: "Masami Hiramatsu (Google)" , Will Deacon , Mathieu Desnoyers , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Ian Rogers , linux-arm-kernel@lists.infradead.org, Robin Murphy Subject: Re: [PATCH v15 1/5] ring-buffer: Flush and stop persistent ring buffer on panic Message-ID: <20260331140357.43731429@gandalf.local.home> In-Reply-To: References: <177494615421.71933.3679132057004156013.stgit@mhiramat.tok.corp.google.com> <177494616630.71933.2941681397188791689.stgit@mhiramat.tok.corp.google.com> X-Mailer: Claws Mail 3.20.0git84 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: 5gpg5dq1wziwms5kahogiegw19p3jr1f X-Rspamd-Server: rspamout02 X-Rspamd-Queue-Id: 968C720015 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Session-ID: U2FsdGVkX1+00qx5ZZTRLH6y/fEb9PB20zgKWv6BfZ8= X-HE-Tag: 1774980179-110066 X-HE-Meta: U2FsdGVkX1+l6HXrKgbWJUZdv3pPnplpcCf8NkR89+/4q1pnapmY+m/tN5jVzwbQ/6B3FYfdUdA+104U46Gw0aqu5rIrDVl5xMhT5Ge+L4364inSPcleZ4qyX+1XvYnkDfQCImdD2BpMpF/bZ+NEiI46CWG58kCr/Fz6IuU5R/pmX2jbIuxa4geT/PzSrooGI+ILt2CF63xqzH76BMvEw5/CzYIzr11LRnQbNrEdYeg0a01vwJhpIpRYLqQ2lnoBc4lPZui9LaWrfti5XhYsaqBTPFBgsn3iinKnnExuHUbO8Mdefj7jc/U/pHNu1CUkEynLGCOPJpwhgfJANaWbI42VWShaSNbqinELCSVZ0sOOcw14DmS7ZDLQbXGLrJWn On Tue, 31 Mar 2026 18:57:13 +0100 Catalin Marinas wrote: > I assume the ring buffer here is cacheable memory, otherwise we'd also > need a dmb(osh) as in arch_wb_cache_pmem(). If that's correct: Yes, it's cacheable (I couldn't imagine the performance overhead if it wasn't! ;-) > > Acked-by: Catalin Marinas Thanks! -- Steve