From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 96D503254B8; Thu, 24 Sep 2026 17:41:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790271667; cv=none; b=BQvomBsH9VRyBgRVgOn0mMjwdjmt9+1YJKRcDa1e3xfvgoMLL8DKeVR1Ry71NPN0p93C5zgPEDniUE0KBZ3haF1Bas3o/LhPa0A9Oup9Qz9yGPD1M4aMRTJVsnmsUQcPqxrkhhgpP8cKJHpHXMHWaFHBhk2RX95thvpp4BUwGk0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790271667; c=relaxed/simple; bh=/P1NKi3khGcefSBIlWc4XAPrIBjMtR0WNL5+c6Wlq4Y=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=DGqoUhGbgE5JmzPzvavOCxh2pi5sjCDqw7nirWm16e22DPcVCyhFU7rB8xJvgOB72RXVT7Qv6uFmqzU7KuaA7cMCEDGmrOOUrxDzUP1grt3mxx4prPCt4+VMtT388161o8FSwtKD1gTWm4HJ+pqPr/Czw/plrIn6zzbxcylxfKQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VnsY865b; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="VnsY865b" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 887921F000FF; Thu, 24 Sep 2026 17:41:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790271666; bh=EYCIvHg8/lq0ByXIuBmYv9z2jqhplm90klgKW5c2/nE=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=VnsY865bvqw/GV3PViUQTw/bjan1HvNlnREu6ByyJ/9uJGNbz8vJYuV4GBx125iVE PMz5rVQRhMmoSVXUNpwRVBuQon2DllTW8nxO4wzeIxh/QICI1whg2AycGcrvM6a00p rJ99a/9llyBOpc4TljUYTYdhRYuHiB+fzIx34TeKn0uq4c8yJBKEzYKJbPm2yKqXJh tuLuy4AyqPL3T1rER8y/aE1zoA6vpFesr6DPXfga5qZHyq32jy2lFvateoQRi6+ci4 lBK5oNGxf8jL7Zj8s+eFhKCK1JpxfHm4kBCnKGK9IBtsk7o7LdBearnz736oQYXG2M nynM//727O9Fw== Date: Thu, 24 Sep 2026 19:41:03 +0200 From: Arnaldo Carvalho de Melo To: Thomas Richter Cc: Ian Rogers , Jens Remus , Jan Polensky , Namhyung Kim , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Ilya Leoshkevich , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-s390@vger.kernel.org Subject: Re: [PATCH] perf evsel: Improve callchain warning for s390 Message-ID: References: <20260922144300.1217524-1-jremus@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Thu, Sep 24, 2026 at 11:40:11AM +0200, Thomas Richter wrote: > On 9/23/26 18:37, Ian Rogers wrote: > > On Tue, Sep 22, 2026 at 7:43 AM Jens Remus wrote: > >> On s390 the kernel uses s390 back chain instead of frame pointers for > >> stack tracing of user space since v6.7 commit aa44433ac4ee ("s390: add > >> USER_STACKTRACE support"). This is because frame pointers on s390 > >> cannot be used for stack tracing. [1] > >> Fixes: ca76fb67ebdd ("perf evlist: Improve default event for s390") > >> Signed-off-by: Jens Remus > > Acked-by: Ian Rogers > Reviewed-by: Thomas Richter Thanks, applied to perf-tools-next, for v7.4. - Arnaldo