From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f178.google.com (mail-pg1-f178.google.com [209.85.215.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BA26513B293; Tue, 9 Apr 2024 15:55:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.178 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712678106; cv=none; b=UCueXl24J299Z4u0ruRpcfW2Tr+xhWY9dE0FxSuNwG286bDhUnDu24JIv6yPaQmMruKRTFSgHLiPgJbz2L5zM5/C1Jm1qL0T42P3zpaFheFWRrNcQONab2bCqEIHaz1+bXkM517hMUsZipZ+pqK8/SFqWnKarUrvcl9LmsSFLRE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712678106; c=relaxed/simple; bh=0lPHtPQnZWwOuPYNH0Mij7OvM1YjXB78i9gew5k4nBo=; h=MIME-Version:References:In-Reply-To:From:Date:Message-ID:Subject: To:Cc:Content-Type; b=G/Nhrh2hJJBCZbXaZrdjBziBgBgfBFjOeu9bsfR4GAwMQSk5MaVnSIm/jD8mNX4bJea5KtM5CNHka84g2myQr5GZ3UdoK8YPTfkBxIE+R9GHnWMo1qIz1TMeRj8gM0vZuCZ5yESLg5GDTnk71y1k4BuFSEwSW6SkX8XtPvAY+uw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.215.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-pg1-f178.google.com with SMTP id 41be03b00d2f7-5e4613f2b56so4435961a12.1; Tue, 09 Apr 2024 08:55:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712678104; x=1713282904; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=6krUFkZxSu7NHCuJ24hvqtrbwkrF1MhKocaeSXBeP1g=; b=BVTkKK/MdEWX6HBXWry60C1xxrWD9IFMx+se6VU9KlsAeaw9cJWHRS689RPSKhXTHs GZTCqB0I8/TkEaZnR8hFyJDPEdu/FaDhGhtCe43bWp5PvLtUcdpyY7KpfRl9ngevTb30 DbwX45tdYgSAuy5w+PeEBkv90LuU75HAPa/p9+UTGYL/291zG8edNiuikYg1t1oWvffg 1LGqnL1+K6VwLfncFqfCo9fUj8Xe1UGZBmmFb7bK3DjpSB7n9etNkDfrIHCoojXxrNFO G6bYC7bssTiyHNJxMHpBZyTg5i1/aWEZOhfZo8dwJZx8inNbB3Mpz0Fms1/C1SjmSYTR 9PRQ== X-Forwarded-Encrypted: i=1; AJvYcCVXgKioS39D+vOK6OChRLWYE/VCg/usgUYVa11WUK9MtYnjf+jOJRSvdeOWvsrUchocHCK6IEcfD6lWw7ALQWJvy3nGG7CQpM36z/1xm9LZMxB2xheJnnQ+TG3RvajurrjlRd2MoUWVkZ9hSe40eQ== X-Gm-Message-State: AOJu0Ywgm6y4bCj1+bujwjDBLkWa1NLXmiFK/oaoKLqI9mv/HSceruaf pYCo00CfoKPh9JthI9NmTfbNgxodBtAkICdUXzxfD+IAIDJWN0DxlbD1+s8w2KsBaMRFMAmADmc Ceq1lsY/AE3MWWKEysAkI/vL/QY4= X-Google-Smtp-Source: AGHT+IHE/dEmZWu5fRh3HefzkZZpkUkBWoB/yZw6LtaPY8lxKNr+Qil08N6s7/bplA2zcN7caznfjTQ4tImCgt1wQzo= X-Received: by 2002:a17:90a:101:b0:29b:ccb4:a250 with SMTP id b1-20020a17090a010100b0029bccb4a250mr40293pjb.16.1712678103729; Tue, 09 Apr 2024 08:55:03 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20240408185520.1550865-1-namhyung@kernel.org> In-Reply-To: From: Namhyung Kim Date: Tue, 9 Apr 2024 08:54:51 -0700 Message-ID: Subject: Re: [PATCHSET 0/9] Sync tools headers with the kernel source To: Arnaldo Carvalho de Melo Cc: Geert Uytterhoeven , Ian Rogers , Kan Liang , Jiri Olsa , Adrian Hunter , Peter Zijlstra , Ingo Molnar , LKML , linux-perf-users@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello, On Tue, Apr 9, 2024 at 6:47=E2=80=AFAM Arnaldo Carvalho de Melo wrote: > > On Tue, Apr 09, 2024 at 09:15:02AM +0200, Geert Uytterhoeven wrote: > > Hi Namhyung, Arnaldo, > > > > On Mon, Apr 8, 2024 at 8:55=E2=80=AFPM Namhyung Kim wrote: > > > I'm gonna carry these changes on the perf tools tree. I'll update th= e > > > vhost.h once it lands on the mainline. > > > > > > This is the full explanation from Arnaldo: > > > > > > There used to be no copies, with tools/ code using kernel headers > > > directly. From time to time tools/perf/ broke due to legitimate kerne= l > > > hacking. At some point Linus complained about such direct usage. Then= we > > > adopted the current model. > > > > Do you have a reference to that? > > I would have to do a search on the mailing list to find the exact > exchange, this is from memory and from people asking this repeatedly. > > Ingo replied with reasons similar to the ones I use in this canned > explanation when sending the notice of updating the files. This is the Ingo's reply: https://lore.kernel.org/r/ZhTwPLliHXKPAJUQ@gmail.com/ Thanks, Namhyung