Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756945Ab3EaTFv (ORCPT ); Fri, 31 May 2013 15:05:51 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:39803 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754725Ab3EaTFn (ORCPT ); Fri, 31 May 2013 15:05:43 -0400 Date: Fri, 31 May 2013 12:05:42 -0700 From: Andrew Morton To: Sachin Kamat Cc: LKML , chanho.min@lge.com, Kamil Debski , Sylwester Nawrocki , Arun Kumar K , Stephen Rothwell Subject: Re: Regression introduced by commit "lib/bitmap.c: speed up bitmap_find_free_region" Message-Id: <20130531120542.87e2056dc7c129e72b83f2af@linux-foundation.org> In-Reply-To: References: X-Mailer: Sylpheed 3.2.0beta5 (GTK+ 2.24.10; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1166 Lines: 31 On Fri, 31 May 2013 12:15:10 +0530 Sachin Kamat wrote: > Hi, > > While testing MFC decoder on Exynos machines, I encountered some > memory allocation errors due to failure of dma_alloc_coherent(). > File: drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c Line: 38. > > Git bisect pointed me to the following commit as the first bad commit > (linux-next tree of 20130531): > > commit 3d5272d9b289cd0930b2ea9984406d757a72f4dd > Author: Chanho Min > Date: Thu May 23 10:37:28 2013 +1000 > lib/bitmap.c: speed up bitmap_find_free_region > > Reverting this (and the commit 197e1cf7 > ("ib-bitmapc-speed-up-bitmap_find_free_region-fix") ) fixes this > issue. > > Looks like some regression has been introduced by the above patch? Thanks. I dropped the patches for now, to minimise linux-next breakage. Hopefully we'll be able to identify and fix this at a later time. -- 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/