From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265115AbUEYWvp (ORCPT ); Tue, 25 May 2004 18:51:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265140AbUEYWvp (ORCPT ); Tue, 25 May 2004 18:51:45 -0400 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:32674 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S265115AbUEYWvn (ORCPT ); Tue, 25 May 2004 18:51:43 -0400 Date: Tue, 25 May 2004 19:53:09 -0300 From: Marcelo Tosatti To: "David S. Miller" Cc: "Feldman, Scott" , doug@easyco.com, linux-kernel@vger.kernel.org, cramerj@intel.com, john.ronciak@intel.com, ganesh.venkatesan@intel.com, jgarzik@pobox.com Subject: Re: Hard Hang with __alloc_pages: 0-order allocation failed (gfp=0x20/1) - Not out of memory Message-ID: <20040525225308.GA5344@logos.cnet> References: <20040525144759.0e51cfd9.davem@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040525144759.0e51cfd9.davem@redhat.com> User-Agent: Mutt/1.5.5.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 25, 2004 at 02:47:59PM -0700, David S. Miller wrote: > On Tue, 25 May 2004 14:20:23 -0700 > "Feldman, Scott" wrote: > > > Marcelo Tosatti wrote: > > > > > It seems we are calling alloc_skb(GFP_KERNEL) from inside an > > > interrupt handler. Oops. > > > > We're calling dev_alloc_skb() from hard interrupt context, but it uses > > GFP_ATOMIC, not GFP_KERNEL, so this is OK, right? I don't see the > > problem with e1000. > > Neither do I, where is the detailed backtrace of this GFP_KERNEL > allocation supposedly from interrupt context? That was just a very wrong guess, I must admit. Actually what seems to be happening is an e1000 IRQ while trying to free memory (shrink_caches()) which tries to allocate more memory. Locked caused by extremely high load it seems. You know better than me.