From mboxrd@z Thu Jan 1 00:00:00 1970 From: Markus Armbruster Subject: Re: serial8250: too much work for irq4 Date: Thu, 19 Feb 2009 17:45:51 +0100 Message-ID: <87ab8i4bpc.fsf@pike.pond.sub.org> References: <87zlglqj8s.fsf@pike.pond.sub.org> <18843.60489.388061.644066@mariner.uk.xensource.com> <87ljs4gcz0.fsf@pike.pond.sub.org> <18844.11007.349311.13328@mariner.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: In-Reply-To: <18844.11007.349311.13328@mariner.uk.xensource.com> (Ian Jackson's message of "Wed\, 18 Feb 2009 15\:36\:31 +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" List-Id: xen-devel@lists.xenproject.org Ian Jackson writes: > Markus Armbruster writes ("Re: [Xen-devel] serial8250: too much work for irq4"): >> I see funny effects where serial output stalls until some input happens, >> but I don't know whether that's related, or whether xen-unstable has the >> same problem. > > This is probably the bug that Anders Kaseorg reported on the 5th of > February which I tracked down to a pair of bugs in the Linux kernel's > serial driver, and therefore unrelated. See > http://lists.xensource.com/archives/html/xen-devel/2009-02/msg00372.html > and the surrounding thread. Yes, the patch there fixes the annoying stall. How did upstream like it? I can't see anything on LKML, maybe I missed it. Thanks! [...]