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 BE35325771 for ; Sat, 17 Oct 2026 01:59:03 +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=1792202344; cv=none; b=XciFZq6CZ2qVfygFhuI0XWWDNfafx9k7X9Wd1cy4+B1XTIA7c/MnLjhrM3yfKdZ9jd7qa26ta3I674mFwFYz7x7LVaWneVonYZhgfNEJPIve5Cl1/t82WR/q0/U8XuOMuFjFtr43iDTC6Xw32twRR2vtLRiGrLViauQnbJkUAfI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792202344; c=relaxed/simple; bh=ztVgcdaYr1p1YE4pId1stB4ckbhMoE5VyPuWuODsh+A=; h=Message-ID:From:Subject:To:Cc:In-Reply-To:References:Content-Type: Date; b=Ls2NDCZfk76NQUgs2z2IjZorQpK7/4b4P2c1PSR81jTHxaxQPjZvppkhXTq9TjrYHg78421cMe2J5OY22BQpRH9gxpwrqaVdqncPbBClHTnE6vhipDYkcufyQxnM3WVH15ZTAwZKJiEpKOGJolErGU1lUoISMg9f/TAm3P6RO5E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dFE27OMw; 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="dFE27OMw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1FE2F1F000C4; Sat, 17 Oct 2026 01:59:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792202343; bh=ztVgcdaYr1p1YE4pId1stB4ckbhMoE5VyPuWuODsh+A=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=dFE27OMw0EXgAeY8ZBn7XgwK3eXtuqynu0fV/p7HJXQV0NqnbWL8hMKXsUcqYdEW2 y3ArWDHNVrpWrIWpYmvd81AulUaFlGPJ02gI2T+mgHjbr635i8emMGI7QkP2OaTbQO TExJ9xo/IjbKwurAkrH+U8/W2/BHGMaB/rOqdBkrSU0OUIgVeBZBBoYdJKeUmPqXcy +bjCFQhlSkPlZtYcUzE0d4GDCaP3PxnVgDhUz8u1QgrZUgu1DJ0I6GmQty4Li5eAmI QlOTPCsLjM3SY5Yy/HKqU8XJNZUJrBjsKWZIPplh6IAuKpgeJEAUriFosy4ho3k0+E C4F7gaefE6OkA== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v2 5/5] alpha: fill in pc for software event samples Reply-To: sashiko-reviews@lists.linux.dev To: "Matt Turner" Cc: linux-perf-users@vger.kernel.org In-Reply-To: <20261016-alpha-perf-regs-v3-v2-5-17654742226a@gmail.com> References: <20261016-alpha-perf-regs-v3-v2-0-17654742226a@gmail.com> <20261016-alpha-perf-regs-v3-v2-5-17654742226a@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Sat, 17 Oct 2026 01:59:02 +0000 Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: > Context switch and tracepoint events have no trap frame, so perf builds > one with perf_fetch_caller_regs(). Alpha does not define > perf_arch_fetch_caller_regs(), which leaves that pt_regs zeroed, and > these samples report pc as 0. >=20 > Record the caller's address as pc. The zero ps already marks the frame > as kernel mode, and pt_regs has nowhere to keep sp, so pc is all that > can be filled in. >=20 > Reported-by: Magnus Lindholm > Closes: https://lore.kernel.org/all/CA%2B%3DFv5S8-Zk8-LUpZnWiBfTGSQXthepm= Rc_-a9O%2BpEPmVW0mRA@mail.gmail.com/ > Assisted-by: Claude:claude-opus-5-5 > Signed-off-by: Matt Turner Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261016-alpha-perf= -regs-v3-v2-0-17654742226a@gmail.com?part=3D5