This is the mail archive of the ecos-discuss@sources.redhat.com mailing list for the eCos project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]

0xDEADBEEF LOCK in spl_any() ;)


FYI: Trying to debug WaveLAN pccard driver.

I'm getting a dead lock in spl_any () in
"net/tcpip/current/src/ecos/synch.c"

I have now set my IP address to a static one as defined below.  
I'm going to have to fix that hw_addr.  I'll do a search in the archives
to see if I can find information on that.  If not, I'll post another
question.

BOOTP[eth0] op: REPLY
       htype: Ethernet
        hlen: 6
        hops: 0
         xid: 0x0
        secs: 0
       flags: 0x0
       hw_addr: ff:ff:ff:ff:ff:ff
     client IP: 172.16.1.30
         my IP: 172.16.1.30
     server IP: 172.16.1.1
    gateway IP: 172.16.1.1
  options:
        subnet mask: 255.255.255.0
       IP broadcast: 172.16.1.255
            gateway: 172.16.1.1


I don't what the "cyg_mutex_lock( &splx_mutex )" is locking splx_mutex
for.  Anyone???

    if ( cyg_thread_self() != splx_thread ) {
        cyg_mutex_lock( &splx_mutex );		// <<<  DEADLOCKS HERE
        old_spl = 0; // Free when we unlock this context
        CYG_ASSERT( 0 == splx_thread, "Thread still owned" );
        CYG_ASSERT( 0 == spl_state, "spl still set" );
        splx_thread = cyg_thread_self();
    }

FYI:  spl_any () is called some time during the splsoftnet() call in
"net/tcpip/current/src/sys/net/route.c:608"

On a last note, I would try and figure this out myself, but I found 2903
occurrences of splx_mutex throughout the sources.  I imagine there's
someone out there that understand the net stack better, and could give
me a hint as to why this might be happening, and how to resolve it!? :)

A BIG thanks in Advance!

Trenton D. Adams
Extreme Engineering
#17, 6025 - 12 St. SE
Calgary, Alberta, Canada
T2H 2K1

Phone: 403 640 9494 ext-208
Fax: 403 640 9599

http://www.extremeeng.com


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]