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 018EC159919; Fri, 3 May 2024 17:19:52 +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=1714756793; cv=none; b=jNqyHVooNUZbmrFOpTC8DiCrTul+Bn9nvDmmPo9AH27bNJN5yWPQNgZF6gS5ykstL4/lJ+VN6QcKbbMsgL8TZtbPiZHxFr1fjL4eGKAEufFY4KoeGdU/j8F4KK1V3CQvGyDcpsHsZWE+6HMJceAirK4p1iEdv/y1BiYLqZcdSTE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714756793; c=relaxed/simple; bh=rYg2z0tMxWh1QUMfPTv8Rlu1//ZpmA9qzDQyAWqJF80=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=eTEc+lkPw00lOz+T1CfxIIHb12RPRk7jbGSsfPD+TR8cU/2K7HeJLZxCkOeIoDoWMz6G0jLZ/sKkX/IDj+UTxZB2u1EnAOmM0S6fVn+vWlT8EhsMaRhCXXU1xORunjyiLE3fouVgagMIXbqx9LnriZLUO7QeWCG/ykSdftWW5e4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jxG6giNO; 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="jxG6giNO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7B6B2C116B1; Fri, 3 May 2024 17:19:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714756792; bh=rYg2z0tMxWh1QUMfPTv8Rlu1//ZpmA9qzDQyAWqJF80=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=jxG6giNOu7+tpTaOA2fawzw8AOIMOZR1t16nC64QwE2TW6alCVLcAU6ft/GAmsv6I KXypYAKpaelL1bfc+v1gz/EIEnQkTyk4BNYddywqhGJupdpHzk5rEO4gnRP4z3jSra J7Q31ZBIa36ABzPqxqASIqOOpbfEMDElAkEsqViox/eSCrsKIDSJKkKCrrJJiNQuoG zLnba6wICm00Fei+RyGHh2VKVvJkfY3XpiB7Lj/nWFelxosyxy6CG9ixlMwtDK+/Xr A01vHxNJcRc0IHdlPix2Ub0FmrABS9U84UJKndL8UPpocWtc2j6Otq0ao+0D3w7aMU op48azWmczaYw== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 22E90CE10CB; Fri, 3 May 2024 10:19:52 -0700 (PDT) Date: Fri, 3 May 2024 10:19:52 -0700 From: "Paul E. McKenney" To: John Paul Adrian Glaubitz Cc: Arnd Bergmann , linux-alpha@vger.kernel.org, Arnd Bergmann , Richard Henderson , Ivan Kokshaysky , Matt Turner , Alexander Viro , Marc Zyngier , Linus Torvalds , linux-kernel@vger.kernel.org, Michael Cree , Frank Scheiner Subject: Re: [PATCH 00/14] alpha: cleanups for 6.10 Message-ID: Reply-To: paulmck@kernel.org References: <20240503081125.67990-1-arnd@kernel.org> <272a909522f2790a30b9a8be73ab7145bf06d486.camel@physik.fu-berlin.de> 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=us-ascii Content-Disposition: inline In-Reply-To: <272a909522f2790a30b9a8be73ab7145bf06d486.camel@physik.fu-berlin.de> On Fri, May 03, 2024 at 06:53:45PM +0200, John Paul Adrian Glaubitz wrote: > Hello Arnd, > > On Fri, 2024-05-03 at 10:11 +0200, Arnd Bergmann wrote: > > I had investigated dropping support for alpha EV5 and earlier a while > > ago after noticing that this is the only supported CPU family > > in the kernel without native byte access and that Debian has already > > dropped support for this generation last year [1] after it turned > > out to be broken. > > That's not quite correct. Support for older Alphas is not broken and > always worked when I tested it. It's just that some people wanted to > raise the baseline in order to improve code performance on newer machines > with the hope to fix some minor issues we saw on Alpha here and there. > > > This topic came up again when Paul E. McKenney noticed that > > parts of the RCU code already rely on byte access and do not > > work on alpha EV5 reliably, so I refreshed my series now for > > inclusion into the next merge window. > > Hrrrm? That sounds like like Paul ran tests on EV5, did he? Arnd does say "noticed", not "tested". No Alpha CPUs here, and I don't run Alpha emulators. There is only so much time in each day and only so much budget for electricity. ;-) For the series: Acked-by: Paul E. McKenney > > Al Viro did another series for alpha to address all the known build > > issues. I rebased his patches without any further changes and included > > it as a baseline for my work here to avoid conflicts. > > It's somewhat strange that Al improves code on the older machines only > to be axed by your series. I would prefer such removals to aimed at an > LTS release, if possible. Once they are in mainline, you are within your rights to send Al's code-improvement patches to -stable, which should get them to the LTS releases. It might well be that Arnd was planning to do just that. Thanx, Paul > Adrian > > -- > .''`. John Paul Adrian Glaubitz > : :' : Debian Developer > `. `' Physicist > `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913