From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) (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 3801032B99A for ; Tue, 21 Oct 2025 14:09:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=216.40.44.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761055780; cv=none; b=uHej3/lJZEKgWgn8LH4m2K+s2T3C4MCiuWNJvFIDiFwqpa9Cd/JdyRl6m+O8zMdOwGn65ek658CCZY27nPxSSNqzLh+xmkiummnkrJSR9q7JdE0Rk9Zxjrha+aD7U0D4NzPzdvX+pNtQ4kEf0OQBoiJpmkE4+8GVygo289t/XA8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761055780; c=relaxed/simple; bh=nn4lvCL6rsCBNVQSCXc+sUXA+7J/EistXykFldeyHWk=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=OMOTRRA4LR0rBVed7fptr9nFx3GElj5F9bG1c7snOMbeZ574nkcxPx1KRfT1GdGlvTwjhGPp5cFdqWay9PLr21oJJIbPWzgmO1byTLFeWETKpliJhdX0wc8wVHqWt8TPdVKyXXjLfc6nNCBEggMdVr8D1J4zzQCwy92+nhhveVw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org; spf=pass smtp.mailfrom=goodmis.org; arc=none smtp.client-ip=216.40.44.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=goodmis.org Received: from omf18.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id C7856593B6; Tue, 21 Oct 2025 14:09:36 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: rostedt@goodmis.org) by omf18.hostedemail.com (Postfix) with ESMTPA id 02DFE30; Tue, 21 Oct 2025 14:09:34 +0000 (UTC) Date: Tue, 21 Oct 2025 10:09:56 -0400 From: Steven Rostedt To: Song Liu Cc: Andrey Grodzovsky , Petr Mladek , "kernel-team@lists.ubuntu.com" , "live-patching@vger.kernel.org" Subject: Re: [External] Re: Question - Livepatch/Kprobe Coexistence on Ftrace-enabled Functions (Ubuntu kernel based on Linux stable 5.15.30) Message-ID: <20251021100956.4c64272c@gandalf.local.home> In-Reply-To: References: <82eaaada-f3fc-44f7-826d-8de47ce9fd39@crowdstrike.com> <69339fb8-04a6-4c28-bb71-d9522ebd7282@crowdstrike.com> <4cc825e6-fdf8-4fc1-8ccd-9bad456c2131@crowdstrike.com> <5477a73a-1dce-4b9e-b389-e757ef5536c4@crowdstrike.com> <7e6886ab-b168-422e-9adf-8297b88643d1@crowdstrike.com> <07ab2111-0f41-40cb-aeb1-d9d3463b1a6a@crowdstrike.com> X-Mailer: Claws Mail 3.20.0git84 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: live-patching@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: tn1s1wmexhzepz9hjg8fad4cp9e4jor4 X-Rspamd-Server: rspamout03 X-Rspamd-Queue-Id: 02DFE30 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Session-ID: U2FsdGVkX19WPT6fRrcbnXNzwNXuOeat+ywiNnkYs6Y= X-HE-Tag: 1761055774-947347 X-HE-Meta: U2FsdGVkX1/XExwIpLQ25yzuu2yl1a41RC4tKmOZOOj0oYZ90/TjlX6paBkKgx2UdN5aSqBis/mjpsQaN/odYkTmMTPfB+cbDJEPYE906QIgowS3t2mTLRLtWa9dD6EA5ns3hUnlhjy96wxB0eTQnaUq1MUmUARUFEsPgiuLROOcpbIlwa1h//nRXXLd8ux5TX6/+AuKA6DaaiPfnUBWs614BF5xgZoDY/EA1jdB5eIlhOzCkY/vAbBlmWjfDzr/HI2Jj8C3VUm0F4IfEa0caoOSFBUFNwxz0srRuzoTN3r67XR4Fgp+mzjA8rxltNjAwCRVEjk8uRKT7elzs6TqkvSZD/M+e+7z5zvWMB+j6mTmvWAjvtEUig== On Mon, 20 Oct 2025 23:07:26 -0700 Song Liu wrote: > commit a8b9cf62ade1bf17261a979fc97e40c2d7842353 > Author: Masami Hiramatsu (Google) > Date: 1 year, 9 months ago > ftrace: Fix DIRECT_CALLS to use SAVE_REGS by default Hmm, this is a work around. I wonder if we can make this work with ARGS as well? Hmm. I'll have to take a look when I get a chance. -- Steve