Re: CPSW bug with AM437x SK
On Friday 03 October 2014 06:34 AM, Felipe Balbi wrote: [ 261.177168] [c0648d48] (skb_panic) from [c0565edc] (skb_put+0x5c/0x60) [ 261.184415] [c0565edc] (skb_put) from [c0605aac] (unix_stream_sendmsg+0x164/0x390) [ 261.192712] [c0605aac] (unix_stream_sendmsg) from [c055b364] (sock_aio_write+0xdc/0xfc) [ 261.201475] [c055b364] (sock_aio_write) from [c014c42c] (do_sync_write+0x8c/0xb4) [ 261.209697] [c014c42c] (do_sync_write) from [c014cf70] (vfs_write+0x118/0x1c0) [ 261.217652] [c014cf70] (vfs_write) from [c014d564] (SyS_write+0x4c/0xa0) [ 261.225054] [c014d564] (SyS_write) from [c000ed40] (ret_fast_syscall+0x0/0x48) [ 261.232988] Code: e58d4008 e58de00c e59f0008 ebfff48e (e7f001f2) [ 261.239378] ---[ end trace d64258d586f40104 ]--- The BT shows that the warn came from a unix socket interface, so this cannot be a CPSW bug, its a bug in unix socket. Are you not seeing this issue with file system in any other media? I will try to reproduce this locally with my AM437x EVMsk. Regards Mugunthan V N -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: CPSW bug with AM437x SK
Hi, On Mon, Oct 06, 2014 at 03:24:59PM +0530, Mugunthan V N wrote: On Friday 03 October 2014 06:34 AM, Felipe Balbi wrote: [ 261.177168] [c0648d48] (skb_panic) from [c0565edc] (skb_put+0x5c/0x60) [ 261.184415] [c0565edc] (skb_put) from [c0605aac] (unix_stream_sendmsg+0x164/0x390) [ 261.192712] [c0605aac] (unix_stream_sendmsg) from [c055b364] (sock_aio_write+0xdc/0xfc) [ 261.201475] [c055b364] (sock_aio_write) from [c014c42c] (do_sync_write+0x8c/0xb4) [ 261.209697] [c014c42c] (do_sync_write) from [c014cf70] (vfs_write+0x118/0x1c0) [ 261.217652] [c014cf70] (vfs_write) from [c014d564] (SyS_write+0x4c/0xa0) [ 261.225054] [c014d564] (SyS_write) from [c000ed40] (ret_fast_syscall+0x0/0x48) [ 261.232988] Code: e58d4008 e58de00c e59f0008 ebfff48e (e7f001f2) [ 261.239378] ---[ end trace d64258d586f40104 ]--- The BT shows that the warn came from a unix socket interface, so this cannot be a CPSW bug, its a bug in unix socket. Are you not seeing this issue with file system in any other media? Have not tried with other media, but since it comes from vfs_write() and my rootfs sits in NFS I figured that might be the cause. Could not reproduce this with BeagleBone Black, btw. I will try to reproduce this locally with my AM437x EVMsk. alright. -- balbi signature.asc Description: Digital signature
CPSW bug with AM437x SK
Hi Mugunthan, I noticed that *really* rarely I get the skb panic below. What I have here is an AM437x SK running v3.17-rc6, with NFS root. Once booted, then I run cyclictest and hackbench (this one in an infinite loop) an eventually this will trigger. File system is mounted as read-only and another board (BBB) is also mounting the exact same NFS root also as read-only. It takes a while to reproduce but it is the second time I managed to reproduce with the exact same setup. .config attached. [ 260.881326] skbuff: skb_over_panic: text:c0605aac len:100 put:100 head: (null) data: (null) tail:0x64 end:0x0 dev:- [ 260.892732] [ cut here ] [ 260.897590] kernel BUG at net/core/skbuff.c:100! [ 260.902441] Internal error: Oops - BUG: 0 [#1] SMP ARM [ 260.907820] Modules linked in: xhci_hcd snd_soc_davinci_mcasp snd_soc_edma snd_soc_omap snd_soc_evm snd_soc_tlv320aic3x snd_soc_core dwc3 snd_compress omapdrm snd_pcm_dmaengine snd_pcm snd_timer snd fb_sys_fops lis3lv02d_i2c panel_dpi matrix_keypad lis3lv02d dwc3_omap input_polldev soundcore [ 260.935072] CPU: 0 PID: 8997 Comm: hackbench Not tainted 3.17.0-rc6-00456-gd8da063-dirty #223 [ 260.944015] task: ead16d80 ti: ec084000 task.ti: ec084000 [ 260.949693] PC is at skb_panic+0x64/0x70 [ 260.953824] LR is at vprintk_emit+0x258/0x5e0 [ 260.958386] pc : [c0648d48]lr : [c009459c]psr: 600f0013 [ 260.958386] sp : ec085db8 ip : ec085d20 fp : ec085dec [ 260.970435] r10: r9 : e8881ac0 r8 : 0001 [ 260.975909] r7 : c087e79c r6 : r5 : 0064 r4 : [ 260.982747] r3 : ead16d80 r2 : r1 : edfb5544 r0 : 006a [ 260.989599] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 260.997090] Control: 10c5387d Table: a91c0059 DAC: 0015 [ 261.003116] Process hackbench (pid: 8997, stack limit = 0xec084248) [ 261.009674] Stack: (0xec085db8 to 0xec086000) [ 261.014233] 5da0: 0064 [ 261.022817] 5dc0: 0064 ea9ed240 0064 0064 [ 261.031393] 5de0: ec085e0c ec085df0 c0565edc c0648cf0 0064 e8881cac e893e1c0 [ 261.039955] 5e00: ec085e7c ec085e10 c0605aac c0565e8c ec085e38 0003 c064e674 e893e254 [ 261.048537] 5e20: ec085e80 ec085ea0 e893e4d4 0001 0064 ece0e840 [ 261.057108] 5e40: c00899e0 ece0e840 e893f940 0064 [ 261.065686] 5e60: 0064 0064 bed59b48 ec085edc ec085e80 c055b364 c0605954 [ 261.074259] 5e80: c018b704 ec085ee4 0064 ece0e840 c0089d60 ec085e3c ec085ea0 [ 261.082843] 5ea0: ec085ee8 0001 ec085ef0 [ 261.091397] 5ec0: ec085f78 ec085f44 ec085ee0 c014c42c c055b294 [ 261.099953] 5ee0: bed59b48 0064 e893f940 ec085e80 [ 261.108502] 5f00: ead16d80 0064 [ 261.117089] 5f20: e893f940 e893f940 bed59b48 ec085f78 ec085f74 ec085f48 [ 261.125662] 5f40: c014cf70 c014c3ac 0001 c016a9d8 e893f940 e893f940 [ 261.134242] 5f60: 0064 bed59b48 ec085fa4 ec085f78 c014d564 c014ce64 [ 261.142843] 5f80: 0064 00024c6c bed59b48 0004 c000efc4 ec084000 ec085fa8 [ 261.151417] 5fa0: c000ed40 c014d524 0064 00024c6c 000c bed59b48 0064 0014 [ 261.159992] 5fc0: 0064 00024c6c bed59b48 0004 0004 00024c50 000221ac [ 261.168555] 5fe0: bed59b44 000113a1 b6f204d6 600f0030 000c [ 261.177168] [c0648d48] (skb_panic) from [c0565edc] (skb_put+0x5c/0x60) [ 261.184415] [c0565edc] (skb_put) from [c0605aac] (unix_stream_sendmsg+0x164/0x390) [ 261.192712] [c0605aac] (unix_stream_sendmsg) from [c055b364] (sock_aio_write+0xdc/0xfc) [ 261.201475] [c055b364] (sock_aio_write) from [c014c42c] (do_sync_write+0x8c/0xb4) [ 261.209697] [c014c42c] (do_sync_write) from [c014cf70] (vfs_write+0x118/0x1c0) [ 261.217652] [c014cf70] (vfs_write) from [c014d564] (SyS_write+0x4c/0xa0) [ 261.225054] [c014d564] (SyS_write) from [c000ed40] (ret_fast_syscall+0x0/0x48) [ 261.232988] Code: e58d4008 e58de00c e59f0008 ebfff48e (e7f001f2) [ 261.239378] ---[ end trace d64258d586f40104 ]--- -- balbi # # Automatically generated file; DO NOT EDIT. # Linux/arm 3.17.0-rc6 Kernel Configuration # CONFIG_ARM=y CONFIG_ARM_HAS_SG_CHAIN=y CONFIG_MIGHT_HAVE_PCI=y CONFIG_SYS_SUPPORTS_APM_EMULATION=y CONFIG_HAVE_PROC_CPU=y CONFIG_STACKTRACE_SUPPORT=y CONFIG_LOCKDEP_SUPPORT=y CONFIG_TRACE_IRQFLAGS_SUPPORT=y CONFIG_RWSEM_XCHGADD_ALGORITHM=y CONFIG_ARCH_HAS_BANDGAP=y CONFIG_GENERIC_HWEIGHT=y CONFIG_GENERIC_CALIBRATE_DELAY=y CONFIG_NEED_DMA_MAP_STATE=y CONFIG_ARCH_SUPPORTS_UPROBES=y CONFIG_VECTORS_BASE=0x CONFIG_ARM_PATCH_PHYS_VIRT=y CONFIG_GENERIC_BUG=y
