From mboxrd@z Thu Jan 1 00:00:00 1970 From: Markus Armbruster Subject: Re: serial8250: too much work for irq4 Date: Wed, 18 Feb 2009 19:18:20 +0100 Message-ID: <87prhfd2xf.fsf@pike.pond.sub.org> References: <87ljs3ekxm.fsf@pike.pond.sub.org> <18844.18978.782069.848765@mariner.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: In-Reply-To: <18844.18978.782069.848765@mariner.uk.xensource.com> (Ian Jackson's message of "Wed\, 18 Feb 2009 17\:49\:22 +0000") List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Ian Jackson Cc: "xen-devel@lists.xensource.com" , Keir Fraser List-Id: xen-devel@lists.xenproject.org Ian Jackson writes: > Keir Fraser writes ("Re: [Xen-devel] serial8250: too much work for irq4"): >> Perhaps we could add a qemu command-line option to force accurate uart >> emulation w.r.t. programmed FIFO depth and baud rate? Then those who want >> this more accurate but more expensive and slower behaviour can configure it. > > That would certainly be possible. Our hw/serial.c is very like > upstream's, and the same issue will apply to (for example) KVM, so we > should coordinate any such change with upstream. I would suggest we > crosspost the patch to xen-devel and qemu-devel. > > Markus: are you sufficiently bothered about this that you'd like to > supply a patch to change the behaviour in the way Keir suggests :-). > > Ian. ;) I don't yet know. I need to try the other patch you mentioned, and see how the that flies. Anyway, the proposed change should most probably be routed through upstream QEMU.