Hello, The patch below we already use since 2009. But I did not code the patch, so I do not know what problem it solves. Here are our CVS logs about the patch:
- To avoid deadlock on mutex 'splx_mutex', I changed 'cyg_mutex_lock' into 'cyg_mutex_trylock'. - Add 'trylock' and 'cyg_thread_delay' to spl_any() in order to handle the deadlock issue on the mutex 'splx_mutex' I am applying the patches from Bernd Edlinger (http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001656)(to fix an anoying problem "packet loss every 20 minutes when ARP timeout expires" and to add raw packets). And I wonder if this patch (below) is still valid? -------------------------------------------------------------------------------- Index: net/bsd_tcpip/current/src/ecos/synch.c =================================================================== RCS file: /cvs/ecos/ecos-opt/net/net/bsd_tcpip/current/src/ecos/synch.c,v retrieving revision 1.3 diff -u -5 -p -r1.3 synch.c --- net/bsd_tcpip/current/src/ecos/synch.c 29 Jan 2009 17:49:56 -0000 1.3 +++ net/bsd_tcpip/current/src/ecos/synch.c 27 Jun 2013 09:12:54 -0000 @@ -115,12 +115,14 @@ static volatile cyg_handle_t splx_thread static inline cyg_uint32 spl_any( cyg_uint32 which ) { cyg_uint32 old_spl = spl_state; if ( cyg_thread_self() != splx_thread ) { - while ( !cyg_mutex_lock( &splx_mutex ) ) + while ( !cyg_mutex_trylock( &splx_mutex ) ) { + cyg_thread_delay(1); continue; + } 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(); } -------------------------------------------------------------------------------- Kind regards, Jürgen -- Jürgen Lambrecht R&D Associate Mobile: +32 499 644 531 Tel: +32 (0)51 303045 Fax: +32 (0)51 310670 http://www.televic-rail.com Televic Rail NV - Leo Bekaertlaan 1 - 8870 Izegem - Belgium Company number 0825.539.581 - RPR Kortrijk
