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 5802C1F9404 for ; Wed, 13 Nov 2024 10:00:26 +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=1731492029; cv=none; b=T26D+tZ85vyb66X+HJgpKowC3vNzpTGktFTVq0Bh29jNBGqoYDRdgI7UNesKtMbcXKjETc83gNAt3lcxEwzVHGJFMBIjCxFOl+gMP4m33j05eDHIXvvfDrShjAnaLgP8YiI5YG2bk57sXYy/PbGzjtTr9F9OT+QyZBmUpQmwiS0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731492029; c=relaxed/simple; bh=Ni6W1HtGN4SZqCW1+9JZsbLTCPyqZYZNV2yq9uO86Pc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=fpzw80VjM+ZHfSO2n4wUOKGl+/xDdJZd4s6N1Xgc5pWBfLm+M0Z7iQfJKqXRt/wlWxcaMjXVJ+kbNs+U+JstnzTuY1OmkJ9K0cDQ4iTzQfhUi/Ii99+doGqFpnaBsjIRYq9k5VNOjzROduY7SEDBzZvNB1bDMJYlx1lrRJ2GQnA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nzWpCFJd; 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="nzWpCFJd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2E9DCC4CECD; Wed, 13 Nov 2024 10:00:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1731492026; bh=Ni6W1HtGN4SZqCW1+9JZsbLTCPyqZYZNV2yq9uO86Pc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=nzWpCFJdEfCE3NN7ccXy6shngZuUFEnycwGFdi9iTV4K8W6IkAjY8PacrlzxaXPYi FDetG4+8ebGic9fmHbsPBVXPuN8cco60Q6brclFCMMhq9fwHWvZpS7XVyVGKwh6umg EsFfw84hhy79NQyvSOoNScXzAkZTsn8NaBBHf2BEWzH8RJGWY0rMu4NT8HHj+0US7F kCzTO00uIH70n3ozqoW8vvGOTm2XhBI0G/FeLe+lk3fRutZB1p56EAr8xca1L7Z/Cy yKUzvOKBrVE0wurNhgbaH6qs/n0yxob4znGT5jHPvKh20c6ShihKKndwfE2OdSNu3i A7XWbEkUTgx1A== Date: Wed, 13 Nov 2024 11:00:21 +0100 From: Ingo Molnar To: Borislav Petkov Cc: Rik van Riel , linux-kernel@vger.kernel.org, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, tglx@linutronix.de, mingo@redhat.com, x86@kernel.org, kernel-team@meta.com, hpa@zytor.com Subject: Re: [PATCh 0/3] x86,tlb: context switch optimizations Message-ID: References: <20241109003727.3958374-1-riel@surriel.com> <20241113095550.GBZzR3pg-RhJKPDazS@fat_crate.local> 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: <20241113095550.GBZzR3pg-RhJKPDazS@fat_crate.local> * Borislav Petkov wrote: > On Fri, Nov 08, 2024 at 07:27:47PM -0500, Rik van Riel wrote: > > While profiling switch_mm_irqs_off with several workloads, > > it appears there are two hot spots that probably don't need > > to be there. > > One of those three is causing the below here, zapping them from tip. I've zapped the final two commits from tip:x86/mm that are the likely source of the regression. Thanks, Ingo