From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f41.google.com (mail-pb0-f41.google.com [209.85.160.41]) by kanga.kvack.org (Postfix) with ESMTP id 74C206B00CC for ; Wed, 6 Nov 2013 06:02:16 -0500 (EST) Received: by mail-pb0-f41.google.com with SMTP id wy17so5721321pbc.28 for ; Wed, 06 Nov 2013 03:02:16 -0800 (PST) Received: from psmtp.com ([74.125.245.201]) by mx.google.com with SMTP id z1si5972876pbn.301.2013.11.06.03.02.13 for ; Wed, 06 Nov 2013 03:02:14 -0800 (PST) Date: Wed, 6 Nov 2013 12:02:00 +0100 From: Peter Zijlstra Subject: Re: [PATCH] mm: create a separate slab for page->ptl allocation Message-ID: <20131106110200.GI10651@twins.programming.kicks-ass.net> References: <1382442839-7458-1-git-send-email-kirill.shutemov@linux.intel.com> <20131105150145.734a5dd5b5d455800ebfa0d3@linux-foundation.org> <20131105224217.GC20167@shutemov.name> <20131105155619.021f32eba1ca8f15a73ed4c9@linux-foundation.org> <20131105231310.GE20167@shutemov.name> <20131106103403.GB21074@mudshark.cambridge.arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131106103403.GB21074@mudshark.cambridge.arm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Will Deacon Cc: "Kirill A. Shutemov" , Andrew Morton , "Kirill A. Shutemov" , Ingo Molnar , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "linux-arch@vger.kernel.org" On Wed, Nov 06, 2013 at 10:34:03AM +0000, Will Deacon wrote: > FWIW: if the architecture selects ARCH_USE_CMPXCHG_LOCKREF, then a spinlock_t > is 32-bit (assuming that unsigned int is also 32-bit). Egads, talk about fragile. That thing relies on someone actually keeping lib/Kconfig up-to-date. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org