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Date: Tue, 22 Aug 2006 18:54:11 +0100 From: Russell King <rmk+lkml@....linux.org.uk> To: Joerg Sommrey <jo@...mrey.de>, Miklos Szeredi <miklos@...redi.hu>, linux-kernel@...r.kernel.org Subject: Re: PROBLEM: FUSE unmount breaks serial terminal line On Tue, Aug 22, 2006 at 07:43:29PM +0200, Joerg Sommrey wrote: > On Tue, Aug 22, 2006 at 06:07:24PM +0200, Miklos Szeredi wrote: > > > Tested both gphoto2 and gtkam without any problems. There is no impact > > > on the serial lines. > > > > > > NB: The *real* trouble I have is with ntpd and a reference clock > > > attached to /dev/ttyS1. ntpd enters a busy loop reading ttyS1, stops > > > working and eats up 100% CPU. > > > > > > Thanks for your investigations. Any other idea? > > > > Try 'killall -9 gphotofs' and then the 'fusermount -u'. > > > > Does that have the same effect? If so, after which does the serial > > line die? > > Here are the results and another insight: only the first serial device > open for reading is affected. I.e. if ttyS0 is open for reading, > ttyS1 doesn't break. If ttyS0 is not open, then ttyS1 breaks. This > happens when gphotofs gets killed (or with fusermount -u without > killing). Have you checked to see what files gphotofs has open? (Check in /proc/<pid>/fd/). -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 Serial core - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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