Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 10 Oct 2002 07:06:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 10 Oct 2002 07:06:28 -0400 Received: from pc1-cwma1-5-cust42.swa.cable.ntl.com ([80.5.120.42]:51114 "EHLO irongate.swansea.linux.org.uk") by vger.kernel.org with ESMTP id ; Thu, 10 Oct 2002 07:06:28 -0400 Subject: Re: [rfc][patch] Memory Binding API v0.3 2.5.41 From: Alan Cox To: Arjan van de Ven Cc: colpatch@us.ibm.com, Linux Kernel Mailing List , linux-mm@kvack.org, LSE , Andrew Morton , Martin Bligh , Michael Hohnbaum In-Reply-To: <1034244381.3629.8.camel@localhost.localdomain> References: <3DA4D3E4.6080401@us.ibm.com> <1034244381.3629.8.camel@localhost.localdomain> Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Ximian Evolution 1.0.8 (1.0.8-10) Date: 10 Oct 2002 12:22:51 +0100 Message-Id: <1034248971.2044.118.camel@irongate.swansea.linux.org.uk> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1006 Lines: 25 On Thu, 2002-10-10 at 11:06, Arjan van de Ven wrote: > > > +/** > > + * sys_mem_setbinding - set the memory binding of a process > > + * @pid: pid of the process > > + * @memblks: new bitmask of memory blocks > > + * @behavior: new behavior > > + */ > > +asmlinkage long sys_mem_setbinding(pid_t pid, unsigned long memblks, > > + unsigned int behavior) > > +{ > > Do you really think exposing low level internals as memory layout / zone > split up to userspace is a good idea ? (and worth it given that the VM > already has a cpu locality preference?) At least in the embedded world that level is a good idea. I'm not sure about the syscall interface. An "unsigned long" mask of blocks sounds like a good way to ensure a broken syscall in the future - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/