From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: [PATCH] pata_legacy: Allow disabling of legacy PATA device probes on non-PCI systems Date: Tue, 29 Nov 2016 15:46:02 -0500 Message-ID: <20161129204602.GD4959@htj.duckdns.org> References: <1480441982-20992-1-git-send-email-tedheadster@gmail.com> <20161129194158.GB4959@htj.duckdns.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-yw0-f196.google.com ([209.85.161.196]:34693 "EHLO mail-yw0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751991AbcK2UqE (ORCPT ); Tue, 29 Nov 2016 15:46:04 -0500 Received: by mail-yw0-f196.google.com with SMTP id a10so13167271ywa.1 for ; Tue, 29 Nov 2016 12:46:04 -0800 (PST) Content-Disposition: inline In-Reply-To: Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: whiteheadm@acm.org Cc: linux-ide@vger.kernel.org, Bartlomiej Zolnierkiewicz Hello, On Tue, Nov 29, 2016 at 03:12:31PM -0500, tedheadster wrote: > > Can you please give a concrete example of a machine and situation > > where this would be useful? > > > > > Sure, my regression testing i486 system has this problem. It only has > an EISA bus, no PCI. I had to apply the patch to be able to put even > 2-3 cards in it. It had run out of IRQs. > > This testing helped uncover a long time kernel bug that now has a patch. > > http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?id=fc0e81b2bea0ebceb71889b61d2240856141c9ee > > Please check the linux-kernel mailing list thread "What exactly do > 32-bit x86 exceptions push on the stack in the CS slot?" for more > details. > > https://lkml.org/lkml/2016/11/19/308 I see. Yeah, I don't have any objections to the change although I do wish it were easier / automatic. That said, given how niche it is, it most likely won't matter. Bartlomiej, what do you think? Thanks. -- tejun