From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.6 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 11AC5C433E0 for ; Thu, 6 Aug 2020 19:03:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4670122D07 for ; Thu, 6 Aug 2020 19:03:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="sByt28GX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729873AbgHFTDH (ORCPT ); Thu, 6 Aug 2020 15:03:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35768 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728346AbgHFTDG (ORCPT ); Thu, 6 Aug 2020 15:03:06 -0400 Received: from mail-pg1-x52c.google.com (mail-pg1-x52c.google.com [IPv6:2607:f8b0:4864:20::52c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C66A6C061575 for ; Thu, 6 Aug 2020 12:03:05 -0700 (PDT) Received: by mail-pg1-x52c.google.com with SMTP id d19so3886967pgl.10 for ; Thu, 06 Aug 2020 12:03:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=qhR0m982Es3MI21ruXSJXbz1Iy4lmeilbsfCyAfMJxo=; b=sByt28GXGJ2qmUWW8e/taZtD9K+rBh8ZeO5EWGmQsAfjQKxxiJ0x7aA33Jjie9WGzW h/GJnsLuSeKO3+9iSSWWwIWHZQ2WjyNKSbLqOJFOsXeQnYUq5qcVwcKqB8ymlBmfB0IZ uWcPI4cPdd58G9dHGGt5Ej/LcFaTOkns3a9RkMfHkO3TCzat0XgjziuKPJC/xJzN/czy wDHHN6XQ4INII6ei0wA/sf9Vc53Qk+4fr/lgATONxbIHuR8dYZpl03qdTW/rrURvUgzc tV1++iAuv0yvCLt3YMnGTN622hMdiD+hhm1rkK7HXgXIJgzBIaNOKjLA7YXATTIDObtY 0OEg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=qhR0m982Es3MI21ruXSJXbz1Iy4lmeilbsfCyAfMJxo=; b=FJQ0bswVa210nPEk0wT3nvle7ilGSUyud5UmYfL0Z1EiF/McoijgE/Vt2bomm6konX k9KoQcfXiV1++f5KDnODVJenssHk1dRy6yeDrON1THd5UbTIojfroHZmSTaD8IBLeUnN P4Z/YHJ5agLq81PPLh1vJyzc+xY4JvItjWBfut+rms/lnLBVEht3H5Utmz3lIuzuJFQ2 txKzu1amZSq0tlxwGejreFL9XWEWZuNNXTt8wr3r7DxArpGUZQ8CduX/bDvXPt1dlRU9 bs8BUEP0pwNAtOrUY9D9AZtA7UQ3co2nb8Lw2ZUWGP8koFzXtSNEqz6WmaBGWafMuuoz 4hQw== X-Gm-Message-State: AOAM531xo0UHyO9yWRFjEOtEIttguJxskjIRK62jv1wBTJ6z1l76lHex T6ASUzKKhCsYo+SmozQYetQBu1rN+h3gzPN6mD7OVg== X-Google-Smtp-Source: ABdhPJwzbr8mf0iH888U0xYgTcLKeaHoK1HqvtprwRAnD5B4KL2v3NwZLj4XrqkreCy0IJajcQ3d1zwjPKpViLQS8qA= X-Received: by 2002:aa7:96e5:: with SMTP id i5mr9578554pfq.108.1596740584269; Thu, 06 Aug 2020 12:03:04 -0700 (PDT) MIME-Version: 1.0 References: <20200716112840.GC8484@osiris> In-Reply-To: From: Nick Desaulniers Date: Thu, 6 Aug 2020 12:02:52 -0700 Message-ID: Subject: Re: linux plumbers + clang + s390 virtualized testing To: Vasily Gorbik Cc: Heiko Carstens , linux-s390 , clang-built-linux , LKML Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 29, 2020 at 6:51 AM Vasily Gorbik wrote: > > > > We were very excited to see your patches going by for enabling Clang > > > support for s390. Since then, we've added s390 builds to our > > > continuous integration setup. > > > > > > We've been running into a few issues with doing virtualized boot tests > > > of our kernels on s390. > > > > > > I was curious if you'll both be attending Linux plumbers conf? If we > > > carve out time for an s390+clang talk, would this be of interest to > > > you to attend? > I will attend and it would surely be interesting to me and other > s390 folks. Your efforts are greatly appreciated! Cool, so our MC has been approved: https://www.linuxplumbersconf.org/event/7/page/80-accepted-microconferences#llvm-cr But we're super tight on time and probably won't be able to do a session on s390 at the MC. That said, I have just submitted a BoF proposal since we have more topics internal to our group we'd like to have more time to discuss. I've added s390 testing to the list of potential topics, too. I'll re-ping this thread once I hear back about whether it gets approved or not. That said, we do meet once every other week virtually online, see links: https://clangbuiltlinux.github.io/. > > BTW I believe basic Clang support for s390 came earlier in 5.2 with > a lot of efforts from Arnd Bergmann. > > My part was fixing recent breakages and bugging our s390 clang team > (which did all the great work) to get kernel specific features support > in clang 10 and 11 to reach features parity with gcc. And eventually > doing few adjustments so that features which came with clang 10 and > 11 are working smoothly. That is s390 "asm goto" support and specific > compiler flags for ftrace support and stack packing. That's awesome; I'd love to get the chance to meet your s390 LLVM team; in general it can take a while to get bugs routed to folks most empowered to fix them until you know who they are. Would you, any fellow s390 kernel and LLVM folks be interested in attending one of our virtual meetings, even if it's just to say "hi" quickly? Next one is next Wednesday. Usually we go over whatever firedrills we've been running the past two weeks, but sometimes have presentations of folks projects and research. I think it would be cool to get more background on s390 and work out the issues we're running into with testing. -- Thanks, ~Nick Desaulniers