From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 8B651747F; Wed, 3 Jul 2024 22:41:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720046464; cv=none; b=anQjKRQ06VG8+XqyacAoqz/vm1uoEAo9NNRpHbGQ7WI3luwOQBzA4RCuBxLgG5H7zKS4aOADy5HefBqhv7t+CqLuV55gt9M+HzTJ9VBogaAdpd8kKzhyKsODZWg8rfMOJBydDSTUmkdLrboK9RiJPjkVXGc88h0uLLGVWzu0QYM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720046464; c=relaxed/simple; bh=c4HcoAL5OGlqvu44M2cW9EqVDsE9T7akesnEeOLwWmM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=KJUTi9Csw0HnNe0yBM/CSB944TwmJId/oJUCN5tA0yLy+euTjJCMgQQLxA7loJOkUMOsdlbQmP2QNFpmfj6d2/ypbp+LQR8hLBryjVHNJqA2C6/9vUJqMquDMZ6EZJ6x3pnVDfx4CtDzYlXBJdwew7b8HNTvWYf6oyORHC6dBgo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pwmglolh; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="pwmglolh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 84136C2BD10; Wed, 3 Jul 2024 22:41:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1720046464; bh=c4HcoAL5OGlqvu44M2cW9EqVDsE9T7akesnEeOLwWmM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=pwmglolhVpLNfs0ZBftSKiiOYy+9lkPvyaGMwiLqTLTXfHyXWdU0MJWDS4L4Pr4mE jua7AgBjYqSnPW1hKfrqRXyQF7gp44u6zWZ/sTV13ECTJiqbe5aBJpuUtuLe43t+tI j0ZKy4bCpocob3tFDKlA9mN0fevvSNjSuX+hkBfwqG2Q+Xud1D6qQvTTbi1/CafxiD Ubb0C6PpOBucKKMIQ+bjrmKZuLeyHgxu5j4C+tluDyH7AIue5mxQrtU4z/NCBdnq8j +4W1KZd7IMfGSawxT1LiA7S9+ZEdNdwfTL0tU/P2qsdT11q6f9ltyW1lrheeFVsKQo VBbqssdmOlqEQ== Date: Wed, 3 Jul 2024 15:41:01 -0700 From: Josh Poimboeuf To: Andrii Nakryiko Cc: Andrii Nakryiko , linux-trace-kernel@vger.kernel.org, peterz@infradead.org, rostedt@goodmis.org, mhiramat@kernel.org, x86@kernel.org, mingo@redhat.com, tglx@linutronix.de, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, rihams@fb.com, linux-perf-users@vger.kernel.org Subject: Re: [PATCH v2] perf,x86: avoid missing caller address in stack traces captured in uprobe Message-ID: <20240703224101.36r32g7j2atskidg@treble> References: <20240702171858.187562-1-andrii@kernel.org> <20240702233554.slj6kh7dn2mc2w4n@treble> <20240702233902.p42gfhhnxo2veemf@treble> <20240703011153.jfg6jakxaiedyrom@treble> <20240703061119.iamshulwf3qzsdu3@treble> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: On Wed, Jul 03, 2024 at 01:23:39PM -0700, Andrii Nakryiko wrote: > > > [0] https://docs.google.com/presentation/d/1k10-HtK7pP5CMMa86dDCdLW55fHOut4co3Zs5akk0t4 > > > > I don't seem to have permission to open it. > > > > Argh, sorry, it's under my corporate account which doesn't allow > others to view it. Try this, I "published" it, let me know if that > still doesn't work: > > [0] https://docs.google.com/presentation/d/e/2PACX-1vRgL3UPbkrznwtNPKn-sSjvan7tFeMqOrIyZAFSSEPYiWG20JGSP80jBmZqGwqMuBGVmv9vyLU4KRTx/pub The new link doesn't work either :-) > > > Few questions, while we are at it. Does it mean that > > > perf_callchain_user() will support working from sleepable context and > > > will wait for data to be paged in? Is anyone already working on this? > > > Any pointers? > > > > I had a prototype here: > > > > https://lkml.kernel.org/lkml/cover.1699487758.git.jpoimboe@kernel.org > > > > Hopefully I can get started on v2 soon. > > Ok, so you are going to work on this. Please cc me on future revisions > then. Thanks! Will do! -- Josh