Date: Thu, 20 Mar 2014 21:42:35 +1030 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: Hans Petter Selasky <hps@bitfrost.no> Cc: freebsd-usb@freebsd.org Subject: Re: USB config SX lock deadlock Message-ID: <C2B2332E-266F-4B21-8ED5-4B68C39A5D69@gsoft.com.au> In-Reply-To: <427679D2-ED43-435A-B362-5F7B89F7AA3A@gsoft.com.au> References: <9783900F-08A1-41FB-81B8-3C9809B82521@gsoft.com.au> <52553000.2010003@bitfrost.no> <A2C6A9D3-1595-41D2-A5C6-B544A3E40058@gsoft.com.au> <52554855.6030404@bitfrost.no> <FFD6BC71-0CAC-41AE-9450-6549F4B0E9C5@gsoft.com.au> <52564953.8080707@bitfrost.no> <7610BC59-ED91-4807-B145-7F7DD2C725E9@gsoft.com.au> <52565BB1.8070506@bitfrost.no> <084BCD21-ADE9-4E60-B637-99EEE1D26389@gsoft.com.au> <427679D2-ED43-435A-B362-5F7B89F7AA3A@gsoft.com.au>
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On 20 Mar 2014, at 15:20, Daniel O'Connor <doconnor@gsoft.com.au> wrote:
> On 20 Mar 2014, at 15:10, Daniel O'Connor <doconnor@gsoft.com.au> =
wrote:
>> #8 0xffffffff8070f932 in usb_ioctl (dev=3D<value optimized out>, =
cmd=3D3222040644, addr=3D0xfffffe011fab8270 "\001", fflag=3D<value =
optimized out>, td=3D<value optimized out>)
>> at /local0/src/sys/dev/usb/usb_dev.c:1075
>=20
> Sigh, I just realised this means my driver was still using f_ioctl, =
not f_ioctl_post.
>=20
> Sorry, will double check that and test again.
OK, I have checked and it is definitely using the _post version - it =
gets stuck in..
#0 sched_switch (td=3D0xfffffe0008f1c490, newtd=3D0xfffffe0002953490, =
flags=3D<value optimized out>) at /local0/src/sys/kern/sched_ule.c:1904
#1 0xffffffff8089e5b0 in mi_switch (flags=3D260, newtd=3D0x0) at =
/local0/src/sys/kern/kern_synch.c:485
#2 0xffffffff808d5274 in sleepq_wait (wchan=3D0xfffffe000817c050, =
pri=3D0) at /local0/src/sys/kern/subr_sleepqueue.c:618
#3 0xffffffff8089d916 in _sx_xlock_hard (sx=3D0xfffffe000817c050, =
tid=3D18446741874836358288, opts=3D<value optimized out>, file=3D<value =
optimized out>,
line=3D<value optimized out>) at /local0/src/sys/kern/kern_sx.c:678
#4 0xffffffff8089de06 in _sx_xlock (sx=3D0xfffffe000817c050, opts=3D0, =
file=3D0xffffffff80e4d528 "/local0/src/sys/dev/usb/usb_device.c", =
line=3D2651) at sx.h:161
#5 0xffffffff8071245a in usbd_enum_lock (udev=3D0xfffffe000817c000) at =
/local0/src/sys/dev/usb/usb_device.c:2651
#6 0xffffffff8070f47a in usb_ref_device (cpd=3D0xfffffe004f287a80, =
crd=3D0xffffff812c284970, need_uref=3D1) at =
/local0/src/sys/dev/usb/usb_dev.c:225
#7 0xffffffff8070fa32 in usb_ioctl (dev=3D<value optimized out>, =
cmd=3D3225710660, addr=3D0xfffffe004eddfd00 "\004", fflag=3D<value =
optimized out>, td=3D<value optimized out>)
at /local0/src/sys/dev/usb/usb_dev.c:1105
#8 0xffffffff8078f01a in devfs_ioctl_f (fp=3D0xfffffe01109f40a0, =
com=3D3225710660, data=3D<value optimized out>, cred=3D<value optimized =
out>, td=3D0xfffffe0008f1c490)
at /local0/src/sys/fs/devfs/devfs_vnops.c:758
#9 0xffffffff808df946 in kern_ioctl (td=3D0xfffffe0008f1c490, fd=3D3, =
com=3D3225710660, data=3D0xfffffe004eddfd00 "\004") at file.h:311
#10 0xffffffff808dfb5d in sys_ioctl (td=3D0xfffffe0008f1c490, =
uap=3D0xffffff812c284b70) at /local0/src/sys/kern/sys_generic.c:696
#11 0xffffffff80c4ee58 in amd64_syscall (td=3D0xfffffe0008f1c490, =
traced=3D0) at subr_syscall.c:135
#12 0xffffffff80c3aa67 in Xfast_syscall () at =
/local0/src/sys/amd64/amd64/exception.S:391
#13 0x00000008010d8d9c in ?? ()
--
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
-- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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