On Fri, Apr 11, 2014 at 01:50:37PM +0800, Arnold kang wrote: > Dear Richard, > thanks for your reply. as i asked , my linux kernel is 3.0, and > my phy is DP83640, and my mac is stmmac, and my cpu is arm A9,
Where did you get your kernel? I guess you have out of tree patches, right? > when i run it and use hardware timestamp (./ptp4l - H -i eth0 -p > /dev/ptp0) on my system, the kernel crashed. (crash log is appended in > below) There is likely a bug in the stmmac driver, see below. > and can i ask a question, " In order for this to work, your MAC > driver must also > implement the skb_tx_timestamp() function." (drivers/ptp/Kconfig), > what's this mean? should i modify the mac driver. Yes, you will need to add this one line into the driver. > > > here is kernel crash log: This trace is badly word wrapped by your email client, making it much harder to read. > <INFO: rcu_sched_state detected stall on CPU 0 (t=6000 jiffies) > Backtrace for cpu 0 (current): > Backtrace: > [<c0041edc>] (dump_backtrace+0x0/0x110) from [<c0520be8>] > (dump_stack+0x18/0x1c) > r6:00000000 r5:00000000 r4:c0667784 r3:c3b7c000 > [<c0520bd0>] (dump_stack+0x0/0x1c) from [<c00436b4>] > (smp_send_all_cpu_backtrace+0x74/0x104) > [<c0043640>] (smp_send_all_cpu_backtrace+0x0/0x104) from [<c003f518>] > (arch_trigger_all_cpu_backtrace+0x10/0x14) > r7:c0648180 r6:c0642080 r5:c0648180 r4:c0747440 > [<c003f508>] (arch_trigger_all_cpu_backtrace+0x0/0x14) from [<c0096018>] > (__rcu_pending+0x158/0x398) > [<c0095ec0>] (__rcu_pending+0x0/0x398) from [<c00962d0>] > (rcu_check_callbacks+0x78/0x168) > [<c0096258>] (rcu_check_callbacks+0x0/0x168) from [<c00661c4>] > (update_process_times+0x40/0x54) > r5:00000000 r4:c38c3840 > [<c0066184>] (update_process_times+0x0/0x54) from [<c0083508>] > (tick_periodic+0x5c/0xcc) > r6:91717f80 r5:00000000 r4:c06420c4 r3:00000000 > [<c00834ac>] (tick_periodic+0x0/0xcc) from [<c00835a4>] > (tick_handle_periodic+0x2c/0xa8) > r9:c3806280 r8:00000023 r7:00000000 r6:c0747040 r4:c06aa098 > r3:c0747040 > [<c0083578>] (tick_handle_periodic+0x0/0xa8) from [<c0083944>] > (tick_do_periodic_broadcast+0xf4/0xfc) > [<c0083850>] (tick_do_periodic_broadcast+0x0/0xfc) from [<c0083964>] > (tick_handle_periodic_broadcast+0x18/0x78) > r6:c06461c0 r5:c38062cc r4:c0646220 r3:c008394c > [<c008394c>] (tick_handle_periodic_broadcast+0x0/0x78) from > [<c0049fb4>] (godnet_timer_interrupt+0x38/0x40) > [<c0049f7c>] (godnet_timer_interrupt+0x0/0x40) from [<c009014c>] > (handle_irq_event_percpu+0x58/0x188) > [<c00900f4>] (handle_irq_event_percpu+0x0/0x188) from [<c00902c4>] > (handle_irq_event+0x48/0x68) > [<c009027c>] (handle_irq_event+0x0/0x68) from [<c0092ae4>] > (handle_fasteoi_irq+0xa4/0x118) > r6:00000023 r5:c38062cc r4:c3806280 r3:c0035110 > [<c0092a40>] (handle_fasteoi_irq+0x0/0x118) from [<c00900d8>] > (generic_handle_irq+0x30/0x38) > r5:c0035b0c r4:00000023 > [<c00900a8>] (generic_handle_irq+0x0/0x38) from [<c0037060>] > (asm_do_IRQ+0x60/0xc0) > r4:c0642480 r3:00000080 > [<c0037000>] (asm_do_IRQ+0x0/0xc0) from [<c003d778>] > (__irq_svc+0x38/0xa0) > Exception stack(0xc3b7dcd0 to 0xc3b7dd18) > dcc0: c384c588 00000003 > 00000001 00000001 > dce0: c384c588 c384c000 c384c3a0 c065b71c 000000e5 c3b7c000 > 000000e5 c3b7dd24 > dd00: c3b7dd28 c3b7dd18 bf000748 c05235e4 20000013 ffffffff > r7:c065b71c r6:00000023 r5:fe300100 r4:ffffffff > [<c05235c8>] (_raw_spin_lock+0x0/0x30) from [<bf000748>] > (stmmac_multicast_list+0x20/0x4c [stmmac]) > [<bf000728>] (stmmac_multicast_list+0x0/0x4c [stmmac]) from > [<c041ba54>] (__dev_set_rx_mode+0x6c/0xa0) The dp83640 driver needs to add a multicast MAC address in order to receive PHY status frames. It looks like the stmmac driver then triggers the lock up. HTH, Richard > r6:00000000 r5:bf00dfe0 r4:c384c000 r3:bf000728 > [<c041b9e8>] (__dev_set_rx_mode+0x0/0xa0) from [<c04262d8>] > (__dev_mc_add+0x50/0x64) > r6:00000000 r5:c384c12c r4:c384c000 r3:00000004 > [<c0426288>] (__dev_mc_add+0x0/0x64) from [<c0426318>] > (dev_mc_add+0x14/0x18) > r7:c3b7ddcc r6:c381d000 r5:00000001 r4:c3b90600 > [<c0426304>] (dev_mc_add+0x0/0x18) from [<c0384470>] > (enable_status_frames+0x8c/0xc8) > [<c03843e4>] (enable_status_frames+0x0/0xc8) from [<c03848cc>] > (dp83640_hwtstamp+0x170/0x290) > r5:c3b7de88 r4:c3b90600 > [<c038475c>] (dp83640_hwtstamp+0x0/0x290) from [<c0382090>] > (phy_mii_ioctl+0x94/0x1ac) > [<c0381ffc>] (phy_mii_ioctl+0x0/0x1ac) from [<bf000710>] > (stmmac_ioctl+0x60/0x78 [stmmac]) > r6:c3b7de88 r5:c384c588 r4:c384c000 r3:00000001 > [<bf0006b0>] (stmmac_ioctl+0x0/0x78 [stmmac]) from > [<c0420fcc>] (dev_ifsioc+0x288/0x3d0) > r5:000089b0 r4:c384c000 > [<c0420d44>] (dev_ifsioc+0x0/0x3d0) from [<c042166c>] > (dev_ioctl+0x558/0x930) > r6:c3b7de88 r5:c06bd9a0 r4:000089b0 r3:c38c3840 > [<c0421114>] (dev_ioctl+0x0/0x930) from [<c040a36c>] > (sock_ioctl+0x9c/0x270) > [<c040a2d0>] (sock_ioctl+0x0/0x270) from [<c00dc9ac>] > (do_vfs_ioctl+0x8c/0x5d8) > r6:0000fdfd r5:c3abb140 r4:bec5ba94 r3:c040a2d0 > [<c00dc920>] (do_vfs_ioctl+0x0/0x5d8) from [<c00dcf38>] > (sys_ioctl+0x40/0x68) > [<c00dcef8>] (sys_ioctl+0x0/0x68) from [<c003db80>] > (ret_fast_syscall+0x0/0x30) > r7:00000036 r6:0000000b r5:000089b0 r4:bec5ba94 > > sending IPI to all other CPUs: > > > > > > thanks > ------------------------------------------------------------------------------ > Put Bad Developers to Shame > Dominate Development with Jenkins Continuous Integration > Continuously Automate Build, Test & Deployment > Start a new project now. Try Jenkins in the cloud. > http://p.sf.net/sfu/13600_Cloudbees > _______________________________________________ > Linuxptp-devel mailing list > Linuxptp-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/linuxptp-devel ------------------------------------------------------------------------------ Put Bad Developers to Shame Dominate Development with Jenkins Continuous Integration Continuously Automate Build, Test & Deployment Start a new project now. Try Jenkins in the cloud. http://p.sf.net/sfu/13600_Cloudbees _______________________________________________ Linuxptp-devel mailing list Linuxptp-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-devel
