From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id ADA281A0845 for ; Tue, 3 Jun 2014 17:52:41 +1000 (EST) Message-ID: <1401781939.3247.11.camel@pasglop> Subject: Re: [PATCH 4/4] powerpc/eeh: Avoid event on passed PE From: Benjamin Herrenschmidt To: Alexander Graf Date: Tue, 03 Jun 2014 17:52:19 +1000 In-Reply-To: <5C4E374F-0BE1-4BE3-991C-E6BD64E90E6A@suse.de> References: <1400574612-19411-1-git-send-email-gwshan@linux.vnet.ibm.com> <1400574612-19411-5-git-send-email-gwshan@linux.vnet.ibm.com> <537B3B97.3020100@suse.de> <20140603055415.GA24370@iris.ozlabs.ibm.com> <5C4E374F-0BE1-4BE3-991C-E6BD64E90E6A@suse.de> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Cc: "aik@ozlabs.ru" , Gavin Shan , "kvm-ppc@vger.kernel.org" , "alex.williamson@redhat.com" , Paul Mackerras , "qiudayu@linux.vnet.ibm.com" , "linuxppc-dev@lists.ozlabs.org" List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Tue, 2014-06-03 at 09:45 +0200, Alexander Graf wrote: > For EEH it could as well be a dumb eventfd - really just a side > channel that can tell user space that something happened > asynchronously :). Which the host kernel may have no way to detect without actively poking at the device (fences in powernv or anything in PAPR host) and the only user of this for now has no use for. I insist don't bother. Cheers, Ben.