I attached gdb info here, see if it help.
and I try to search function "fusion_skirmish_lock()" from source package, but
did not find it. could you tell me where is it? I'd like to learn how it is
working.
# /mnt/gdb/gdb /bin/myapp
GNU gdb Red Hat Linux (6.5-8.fc6rh)
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welcome to change it and/or distribute copies of it under certain conditions.
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This GDB was configured as "i386-redhat-linux-gnu"...
(no debugging symbols found)
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) attach 12409
Attaching to program: /bin/myapp, process 12409
Reading symbols from /lib/libdirectfb-1.0.so.0...(no debugging symbols
found)...done.
Loaded symbols for /lib/libdirectfb-1.0.so.0
Reading symbols from /lib/libz.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libz.so.1
Reading symbols from /lib/libfusion-1.0.so.0...
(no debugging symbols found)...done.
Loaded symbols for /lib/libfusion-1.0.so.0
Reading symbols from /lib/libdirect-1.0.so.0...(no debugging symbols
found)...done.
Loaded symbols for /lib/libdirect-1.0.so.0
Reading symbols from /lib/libpthread.so.0...
(no debugging symbols found)...done.
Loaded symbols for /lib/libpthread.so.0
Reading symbols from /lib/libdl.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /lib/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/libgcc_s.so.1...
(no debugging symbols found)...done.
Loaded symbols for /lib/libgcc_s.so.1
Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /lib/directfb-1.0-0/systems/libdirectfb_fbdev.so...
(no debugging symbols found)...done.
Loaded symbols for /lib/directfb-1.0-0/systems/libdirectfb_fbdev.so
(no debugging symbols found)
0xb7f13402 in __kernel_vsyscall ()
(gdb) where
#0 0xb7f13402 in __kernel_vsyscall ()
#1 0xb7df1a49 in ioctl () from /lib/libc.so.6
#2 0xb7ea05a6 in fusion_skirmish_prevail () from /lib/libfusion-1.0.so.0
#3 0xb7e9df46 in fusion_arena_enter () from /lib/libfusion-1.0.so.0
#4 0xb7ef17ac in dfb_core_create () from /lib/libdirectfb-1.0.so.0
#5 0xb7ebe1b3 in DirectFBCreate () from /lib/libdirectfb-1.0.so.0
#6 0x08048667 in ?? ()
#7 0xbfbad168 in ?? ()
#8 0x080487ae in _IO_stdin_used ()
#9 0xbfbad188 in ?? ()
...
#18 0xbfbad1e8 in ?? ()
#19 0xb7d517c8 in __libc_start_main () from /lib/libc.so.6
#20 0xb7d517c8 in __libc_start_main () from /lib/libc.so.6
#21 0x08048551 in ?? ()
> Date: Thu, 6 Dec 2007 11:48:50 +0100> From: [EMAIL PROTECTED]> To: [EMAIL
> PROTECTED]> CC: directfb-dev@directfb.org> Subject: Re: [directfb-dev]
> linux-fusion lock problem> > Denis Oliver Kropp wrote:> > Victor Liu wrote:>
> >> Hi,> >> > >> while I am using DirectFB with fusion, some time the
> application was locked. we debugged into, find lock is in fusion. I looked
> the code, found a place seems missed unlock (see red line or comment). if any
> one knows linux-fusion, please make sure. both 3.x or 7.x have same code.> >>
> > >> Thanks,> >> Victor Liu> >> > >> int> >> fusion_skirmish_prevail
> (FusionDev *dev, int id, int fusion_id)> >> {> >> int ret;> >> FusionSkirmish
> *skirmish;> >> #ifdef FUSION_DEBUG_SKIRMISH_DEADLOCK> >> FusionSkirmish *s;>
> >> int i;> >> bool outer = true;> >> #endif> >>
> dev->stat.skirmish_prevail_swoop++;> >> ret = fusion_skirmish_lock(
> &dev->skirmish, id, true, &skirmish );> >> if (ret)> >> return ret;> >> > >>
> ......> >> > >> up( &dev->skirmish.lock );> >> while (skirmish->lock_pid) {>
> >> ret = fusion_skirmish_wait( skirmish, NULL );> >> if (ret)> >> {> >>
> fusion_skirmish_unlock( skirmish ); // original code does not have this line>
> > > > IIRC, a non-zero return value (error) means the lock is not
> reacquired.> > Only if the call was successful, the code needs to unlock it.>
> > > > But I'm checking the code now (fusion_entry_wait).> > The code looks
> fine. Where exactly is it blocking in your case?> > -- > Best regards,> Denis
> Oliver Kropp> > .------------------------------------------.> | DirectFB -
> Hardware accelerated graphics |> | http://www.directfb.org/ |>
> "------------------------------------------"
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