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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