From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.zytor.com (terminus.zytor.com [198.137.202.136]) (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 A206D35E943 for ; Fri, 19 Jun 2026 21:54:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.136 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781906078; cv=none; b=rXQhBTQ6Lb40c2bMjKaEkzUH7t1Re9c71vTigMMEQUo/YOt98PHh5tzJIS0iOEoHvlNvHUwFseK55V4DDdTx/D2szzMSH1t3EhEaZSIWHEqdqsQLmDOb72cupiUIfNX9bEUm6B9J2QW5JCVe1n2rReBpUoRy5rPTeNFzjEuUC18= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781906078; c=relaxed/simple; bh=Ue7VSH+ATZdrFyLjlUWQWcz0DaiZOOPHuBSmX7V01wc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=XRmLBG/P3Y/ul2clCQxBAvcRvvCINev0dUupcl5AKcglCELhEkl6pWtwjD2mfNgON8Q4pE3un3NKq12w7BCqMF/C4LAthVSblLAnYniRRdDa34ga+6O3UuitPCWEFcZog090T2G9REuS9Fzr0b7bUcfOsrDxSB1l2+0wuSB2ytA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zytor.com; spf=pass smtp.mailfrom=zytor.com; dkim=pass (2048-bit key) header.d=zytor.com header.i=@zytor.com header.b=HFGLl3kP; arc=none smtp.client-ip=198.137.202.136 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zytor.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=zytor.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=zytor.com header.i=@zytor.com header.b="HFGLl3kP" Received: from [10.124.222.186] ([192.55.55.42]) (authenticated bits=0) by mail.zytor.com (8.18.1/8.17.1) with ESMTPSA id 65JLrq0F1967234 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NO); Fri, 19 Jun 2026 14:53:52 -0700 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.zytor.com 65JLrq0F1967234 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zytor.com; s=2026052701; t=1781906033; bh=UO5jYniNdHYicN3KYUVVaRavzcaMTb3O89L4K/CtVik=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=HFGLl3kP9F4tkS/TNa9cLkH6FXNphsEN3lG3h2lYx9ndbgvODzMgA033i41WPHKzh IYeU7uy0gxVFwfmng6tf7TYXqP3bsOuogxIGWntTRqHRsYF/yMD6M3X3z2F26NsHjA xbECDAw0meU9n0C4tfkIWLEIC6sN7WRsSYSau7c2HrDnuJ/+PBQrItl0h3mlCmjild lam+b3NNn0zOdGaHmsKyK5c8/Vh7qEq8eE0M4gpLU1K8mtu4sgypwUrMT5uVMOvDwv 7eyKo1ApR0vCSRIa4Ddepqi7O3ATiG1r8A79GJTWYllLBFRkrYV0OXOrqsO3Fipk+X siYlwzV/HWFCQ== Message-ID: Date: Fri, 19 Jun 2026 14:53:47 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: syscall path improvements (was: syscall performance regression, debunked) To: Peter Zijlstra Cc: Linus Torvalds , tglx@kernel.org, mingo@redhat.com, bp@alien8.de, Nathan Chancellor , Calvin Owens , Dave Hansen , x86-ML , LKML References: <20260613085919.GF42921@noisy.programming.kicks-ass.net> <203E61B7-290F-4F87-860F-B352D0072703@zytor.com> <20260616082814.GQ48970@noisy.programming.kicks-ass.net> <20260617123718.GM49951@noisy.programming.kicks-ass.net> <20260619081427.GD49529@noisy.programming.kicks-ass.net> <6B52EE70-FB51-4053-B888-DD3EC6D66C54@zytor.com> <20260619111848.GO42921@noisy.programming.kicks-ass.net> Content-Language: en-US, sv-SE From: "H. Peter Anvin" In-Reply-To: <20260619111848.GO42921@noisy.programming.kicks-ass.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2026-06-19 04:18, Peter Zijlstra wrote: > > A few patches here: > > git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/syscall > > That now includes IA32_EMULATION and a few terse changelogs. The > alignment thing went missing since that didn't seem to be very good. > I will try it out! -hpa