From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx160.postini.com [74.125.245.160]) by kanga.kvack.org (Postfix) with SMTP id 2CA7F6B0008 for ; Mon, 11 Feb 2013 14:44:38 -0500 (EST) In-Reply-To: <20130211182826.GE2683@pd.tnic> References: <20130208202813.62965F25@kernel.stglabs.ibm.com> <20130209094121.GB17728@pd.tnic> <20130209104751.GC17728@pd.tnic> <51192B39.9060501@linux.vnet.ibm.com> <20130211182826.GE2683@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH 1/2] add helper for highmem checks From: "H. Peter Anvin" Date: Mon, 11 Feb 2013 11:44:12 -0800 Message-ID: <7794bbcd-5d5a-4e81-87fd-68b0aa17a556@email.android.com> Sender: owner-linux-mm@kvack.org List-ID: To: Borislav Petkov , Dave Hansen Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, mingo@kernel.org, tglx@linutronix.de Oh, craptastic. X used to hash /dev/mem to get a random seed. It should have stopped that long ago, and used /dev/[u]random. Borislav Petkov wrote: >On Mon, Feb 11, 2013 at 09:32:41AM -0800, Dave Hansen wrote: >> That's crazy. Didn't expect that at all. >> >> I guess X is happier getting an error than getting random pages back. > >Yeah, I think this is something special only this window manager wdm >does. The line below has appeared repeatedly in the logs earlier: > >Feb 5 23:02:02 a1 wdm: Cannot read randomFile "/dev/mem", errno = 14 > >This happens when wdm starts so I'm going to guess it uses it for >something funny, "randomFile" it calls it?? > >With the WARN_ON check added and booting 3.8-rc6, it would choke wdm >somehow and it wouldn't start properly so that even the error out above >doesn't happen. Oh well ... > >> I'm working on a set of patches now that should get it _working_ >> instead of just returning an error. > >Yeah, send them on and I'll run them. > >Thanks. -- Sent from my mobile phone. Please excuse brevity and lack of formatting. -- 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