Date: Sun, 16 Nov 2014 17:45:56 -0800 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: Hans Petter Selasky <hps@selasky.org> Cc: Adrian Chadd <adrian@freebsd.org>, freebsd-current <freebsd-current@freebsd.org>, Dag-Erling Sm?rgrav <des@freebsd.org>, Ian Lepore <ian@FreeBSD.org> Subject: Re: USB locks up system -- WAS Re: shutdown or acpi problem Message-ID: <20141117014556.GA38184@troutmask.apl.washington.edu> In-Reply-To: <5468FBFB.1090208@selasky.org> References: <1416162070.4781.186.camel@revolution.hippie.lan> <F0B9570C-BADD-4843-AE91-66CAB0B5DE85@FreeBSD.org> <1416162718.4781.192.camel@revolution.hippie.lan> <4F3B4E02-0ADD-46EB-BB90-BF360E810585@FreeBSD.org> <20141116185141.GB36021@troutmask.apl.washington.edu> <4443FEFB-17F1-4516-959F-4C70AB2A4382@FreeBSD.org> <20141116190344.GC36021@troutmask.apl.washington.edu> <5468F814.6010702@selasky.org> <20141116192959.GB36339@troutmask.apl.washington.edu> <5468FBFB.1090208@selasky.org>
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On Sun, Nov 16, 2014 at 08:33:15PM +0100, Hans Petter Selasky wrote: > > thread apply all bt > > That will give you the backtrace of all threads. Grep for usbconfig, and > figure out which line is causing the problem in the kernel. Then look at > the USB explore threads and see where they are stuck in the detach of umass! > I haven't tried the kgdb approach, yet. I can say that the problem is coming from sg device. If I have 'device sg' in my config file, the problems occur. Removing 'device sg' gives a working kernel. If I do not start hald in /etc/rc.conf, everything works as expected. Now, if hald was started at boot and I then stop hald with '/usr/local/etc/rc.d/hald stop' then the one hald relate process is not stopped. I've wrapped lines to keep this short. % ps axl | grep hald UID PID PPID CPU PRI NI VSZ RSS MWCHAN STAT TT TIME COMMAND 0 1058 1 195 20 0 13180 3512 - I - 0:00.05 hald-probe-storage: /dev/sg1 (hald-probe-storage) Using the procstat as suggested by Adrian, I have % procstat -ka 1058 100157 hald-probe-storage hald-probe-stora mi_switch sleepq_switch sleepq_catch_signals sleepq_wait_sig _sleep sgread giant_read devfs_read_f dofileread kern_readv sys_read syscall Xint0x80_syscall -- Steve
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