From owner-freebsd-stable@FreeBSD.ORG  Wed Sep 14 23:30:33 2005
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
X-Original-To: freebsd-stable@freebsd.org
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id E0D9816A41F
	for <freebsd-stable@freebsd.org>; Wed, 14 Sep 2005 23:30:33 +0000 (GMT)
	(envelope-from lyndon@orthanc.ca)
Received: from orthanc.ca (orthanc.ca [209.89.70.53])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 7960943D48
	for <freebsd-stable@freebsd.org>; Wed, 14 Sep 2005 23:30:33 +0000 (GMT)
	(envelope-from lyndon@orthanc.ca)
Received: from peregrin.orthanc.ca (d216-232-211-96.bchsia.telus.net
	[216.232.211.96]) (authenticated bits=0)
	by orthanc.ca (8.13.3/8.13.3) with ESMTP id j8ENUNBp022147
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
	Wed, 14 Sep 2005 17:30:24 -0600 (MDT)
	(envelope-from lyndon@orthanc.ca)
Received: from [127.0.0.1] (localhost [127.0.0.1])
	by peregrin.orthanc.ca (8.13.5.Beta0/8.13.5.Beta0) with ESMTP id
	j8ENUH29005783; Wed, 14 Sep 2005 16:30:17 -0700 (PDT)
In-Reply-To: <20050914231354.GR793@funkthat.com>
References: <20050914211535.L97204@geri.cc.fer.hr>
	<20050914192543.GA79143@xor.obsecurity.org>
	<20050914231354.GR793@funkthat.com>
Mime-Version: 1.0 (Apple Message framework v734)
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
Message-Id: <6B09630D-66AD-458F-81B6-6D04AFEE5D78@orthanc.ca>
Content-Transfer-Encoding: 7bit
From: Lyndon Nerenberg <lyndon@orthanc.ca>
Date: Wed, 14 Sep 2005 16:30:16 -0700
To: John-Mark Gurney <gurney_j@resnet.uoregon.edu>
X-Mailer: Apple Mail (2.734)
X-Spam-Status: No, score=0.0 required=5.0 tests=AWL autolearn=ham 
	version=3.0.4
X-Spam-Checker-Version: SpamAssassin 3.0.4 (2005-06-05) on orthanc.ca
Cc: freebsd-stable@freebsd.org
Subject: Re: ENOMEM in swap_pager
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 14 Sep 2005 23:30:34 -0000


On Sep 14, 2005, at 4:13 PM, John-Mark Gurney wrote:

>>> IIRC GEOM should handle ENOMEMs by retrying the IO, but I'm  
>>> asking just in
>>> case - are these errors something I should worry about?
>>>
>>
>> I/O errors suggest your disk is failing.
>>
>
> Unless for some reason his disk is running out of memory:
> grep 12 /usr/include/errno.h
> #define    ENOMEM        12        /* Cannot allocate memory */

The error occurs when sys/vm/swap_pager:swapgeom_strategy() can't  
allocate a copy of an underlying I/O request buffer. The log message  
lies a bit; this isn't a physical disk I/O error.

--lyndon