Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761740AbZJOCCn (ORCPT ); Wed, 14 Oct 2009 22:02:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760790AbZJOCCm (ORCPT ); Wed, 14 Oct 2009 22:02:42 -0400 Received: from Cpsmtpm-eml109.kpnxchange.com ([195.121.3.13]:56093 "EHLO CPSMTPM-EML109.kpnxchange.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757370AbZJOCCl (ORCPT ); Wed, 14 Oct 2009 22:02:41 -0400 From: Frans Pop To: reinette chatre Subject: Re: [Bug #14141] order 2 page allocation failures in iwlagn Date: Thu, 15 Oct 2009 04:02:00 +0200 User-Agent: KMail/1.9.9 Cc: Mel Gorman , David Rientjes , KOSAKI Motohiro , "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Pekka Enberg , Bartlomiej Zolnierkiewicz , Karol Lewandowski , "Abbas, Mohamed" , "John W. Linville" , "linux-mm@kvack.org" References: <3onW63eFtRF.A.xXH.oMTxKB@chimera> <20091014165051.GE5027@csn.ul.ie> <1255552911.21134.51.camel@rc-desk> In-Reply-To: <1255552911.21134.51.camel@rc-desk> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200910150402.03953.elendil@planet.nl> X-OriginalArrivalTime: 15 Oct 2009 02:02:04.0447 (UTC) FILETIME=[7DEB6AF0:01CA4D3B] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2437 Lines: 34 On Wednesday 14 October 2009, reinette chatre wrote: > We do queue the GFP_KERNEL allocations when there are only a few buffers > remaining in the queue (8 right now) ... maybe we can make this higher? I've tried increasing it to 50. Here's the result for a single test: iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 25 free buffers remaining. iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 48 free buffers remaining. iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 0 free buffers remaining. iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 0 free buffers remaining. iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 48 free buffers remaining. iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 0 free buffers remaining. iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 48 free buffers remaining. iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 0 free buffers remaining. __ratelimit: 1 callbacks suppressed iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 0 free buffers remaining. iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 0 free buffers remaining. iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 0 free buffers remaining. iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 0 free buffers remaining. iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 0 free buffers remaining. __ratelimit: 97 callbacks suppressed iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 44 free buffers remaining. iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 0 free buffers remaining. iwlagn 0000:10:00.0: Failed to allocate SKB buffer with GFP_ATOMIC. Only 0 free buffers remaining. This is with current mainline (v2.6.32-rc4-149-ga3ccf63). The log file timestamps don't tell much as the logging gets delayed, so they all end up at the same time. Maybe I should enable the kernel timestamps so we can see how far apart these failures are. -- 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/