| Message ID | 1346101403-5882-1-git-send-email-aaro.koskinen@iki.fi (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, Aug 27, 2012 at 2:03 PM, Aaro Koskinen <aaro.koskinen@iki.fi> wrote: > > When booting kernel on RM-680/N950, the console is flooded with: > > [ 6.894348] In-band Error seen by MPU at address 0 > [ 6.894348] ------------[ cut here ]------------ > [ 6.894378] WARNING: at arch/arm/mach-omap2/omap_l3_smx.c:162 > omap3_l3_app_irq+0xd4/0x12c() > [ 6.894378] Modules linked in: > [ 6.894409] Backtrace: > [ 6.894409] [<c0012440>] (dump_backtrace+0x0/0x10c) from [<c02fb698>] > (dump_stack+0x18/0x1c) > [ 6.894439] r6:c002de58 r5:00000009 r4:00000000 r3:c0880180 > [ 6.894470] [<c02fb680>] (dump_stack+0x0/0x1c) from [<c0039854>] > (warn_slowpath_common+0x54/0x6c) > [ 6.894500] [<c0039800>] (warn_slowpath_common+0x0/0x6c) from > [<c0039890>] (warn_slowpath_null+0x24/0x2c) > [ 6.894500] r8:0000000a r7:00000000 r6:f8001400 r5:00000000 > r4:84001b00 > [ 6.894500] r3:00000009 > [ 6.894561] [<c003986c>] (warn_slowpath_null+0x0/0x2c) from > [<c002de58>] (omap3_l3_app_irq+0xd4/0x12c) > [ 6.894561] [<c002dd84>] (omap3_l3_app_irq+0x0/0x12c) from [<c008561c>] > (handle_irq_event_percpu+0x54/0x19c) > [ 6.894592] r7:00000000 r6:00000000 r5:c082c710 r4:ef072340 > [ 6.894622] [<c00855c8>] (handle_irq_event_percpu+0x0/0x19c) from > [<c00857c4>] (handle_irq_event+0x60/0x80) > [ 6.894653] [<c0085764>] (handle_irq_event+0x0/0x80) from [<c0088300>] > (handle_level_irq+0xb4/0x134) > [ 6.894653] r5:c082c710 r4:c082c6c0 > [ 6.894683] [<c008824c>] (handle_level_irq+0x0/0x134) from [<c0084e18>] > (generic_handle_irq+0x2c/0x44) > [ 6.894683] r6:ef02c000 r5:c0829014 r4:c0841e18 r3:c008824c > [ 6.894744] [<c0084dec>] (generic_handle_irq+0x0/0x44) from > [<c000f228>] (handle_IRQ+0x54/0xb8) > [ 6.894744] [<c000f1d4>] (handle_IRQ+0x0/0xb8) from [<c000873c>] > (omap3_intc_handle_irq+0x68/0x7c) > [ 6.894775] r8:c08415cc r7:0000000a r6:c0898c38 r5:ef02de88 > r4:fa200000 > [ 6.894775] r3:00000000 > [ 6.894805] [<c00086d4>] (omap3_intc_handle_irq+0x0/0x7c) from > [<c0302e80>] (__irq_svc+0x40/0x54) > [ 6.894836] Exception stack(0xef02de88 to 0xef02ded0) > [ 6.894836] de80: f0048000 00000000 00007000 00000000 > 0000 3035 f004bfca > [ 6.894866] dea0: 00000000 00000000 c08415cc c0898140 ef02c000 ef02def4 > ef02 def8 ef02ded0 > [ 6.894866] dec0: c042b1dc c0016efc 20000013 ffffffff > [ 6.894897] r7:ef02debc r6:ffffffff r5:20000013 r4:c0016efc > [ 6.894927] [<c0016ed0>] (_memset_io+0x0/0x50) from [<c042b1dc>] > (omap_sram_init+0x228/0x56c) > [ 6.894927] r8:c0445cf4 r7:c0417208 r6:c0898140 r5:c0899840 > r4:c0899a3c > [ 6.894927] r3:f004f000 > [ 6.894989] [<c042afb4>] (omap_sram_init+0x0/0x56c) from [<c041f01c>] > (omap_sdrc_init+0x18/0xb8) > [ 6.894989] r6:c0898140 r5:c0899840 r4:c0899840 r3:0005e601 > [ 6.895019] [<c041f004>] (omap_sdrc_init+0x0/0xb8) from [<c0427e38>] > (rm680_init+0x34/0xc0) > [ 6.895050] r5:c04518e0 r4:c0875da0 > [ 6.895080] [<c0427e04>] (rm680_init+0x0/0xc0) from [<c0419934>] > (customize_machine+0x24/0x30) > [ 6.895080] r5:00000003 r4:00000000 > [ 6.895111] [<c0419910>] (customize_machine+0x0/0x30) from [<c00088e0>] > (do_one_initcall+0x11c/0x184) > [ 6.895141] [<c00087c4>] (do_one_initcall+0x0/0x184) from [<c041799c>] > (kernel_init+0x100/0x1c4) > [ 6.895141] [<c041789c>] (kernel_init+0x0/0x1c4) from [<c003ef18>] > (do_exit+0x0/0x794) > [ 6.895172] ---[ end trace 1b75b31a271a0d00 ]--- > > This is repeated maybe a thousand times. While the root cause remains > unknown (they seem to occur during SDRC and DMA init), the errors should > be at least ratelimited so that user will also have chance to see other > boot messages. > > Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> > --- > arch/arm/mach-omap2/omap_l3_smx.c | 4 ++-- > 1 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/arm/mach-omap2/omap_l3_smx.c > b/arch/arm/mach-omap2/omap_l3_smx.c > index acc2164..e3b4948 100644 > --- a/arch/arm/mach-omap2/omap_l3_smx.c > +++ b/arch/arm/mach-omap2/omap_l3_smx.c > @@ -155,11 +155,11 @@ static irqreturn_t omap3_l3_block_irq(struct > omap3_l3 *l3, > u8 multi = error & L3_ERROR_LOG_MULTI; > u32 address = omap3_l3_decode_addr(error_addr); > > - pr_err("%s seen by %s %s at address %x\n", > + pr_err_ratelimited("%s seen by %s %s at address %x\n", > omap3_l3_code_string(code), > omap3_l3_initiator_string(initid), > multi ? "Multiple Errors" : "", address); > - WARN_ON(1); > + WARN_ON_ONCE(1); > The issue needs to be fixed instead of WARN_ON_ONCE() and then just moving ahead. Interconnect in bad states is really bad state and you won't have reliable operations post that on SOC. Regards Santosh
Hi, On Mon, Aug 27, 2012 at 02:35:57PM -0700, Shilimkar, Santosh wrote: > > - pr_err("%s seen by %s %s at address %x\n", > > + pr_err_ratelimited("%s seen by %s %s at address %x\n", > > omap3_l3_code_string(code), > > omap3_l3_initiator_string(initid), > > multi ? "Multiple Errors" : "", address); > > - WARN_ON(1); > > + WARN_ON_ONCE(1); > > > The issue needs to be fixed instead of WARN_ON_ONCE() and then > just moving ahead. Interconnect in bad states is really bad state and you > won't have reliable operations post that on SOC. How printing megabytes of identical stack traces helps anything? This has been there always (since the L3 driver was added) on every boot with N950/N9 (which BTW are HS devices, not sure if that has anything to do with it). There is no apparent effect on device functionality, at least nothing unusual has been observed... Is there any documentation how to interpret and debug this error report? A.
diff --git a/arch/arm/mach-omap2/omap_l3_smx.c b/arch/arm/mach-omap2/omap_l3_smx.c index acc2164..e3b4948 100644 --- a/arch/arm/mach-omap2/omap_l3_smx.c +++ b/arch/arm/mach-omap2/omap_l3_smx.c @@ -155,11 +155,11 @@ static irqreturn_t omap3_l3_block_irq(struct omap3_l3 *l3, u8 multi = error & L3_ERROR_LOG_MULTI; u32 address = omap3_l3_decode_addr(error_addr); - pr_err("%s seen by %s %s at address %x\n", + pr_err_ratelimited("%s seen by %s %s at address %x\n", omap3_l3_code_string(code), omap3_l3_initiator_string(initid), multi ? "Multiple Errors" : "", address); - WARN_ON(1); + WARN_ON_ONCE(1); return IRQ_HANDLED; }
When booting kernel on RM-680/N950, the console is flooded with: [ 6.894348] In-band Error seen by MPU at address 0 [ 6.894348] ------------[ cut here ]------------ [ 6.894378] WARNING: at arch/arm/mach-omap2/omap_l3_smx.c:162 omap3_l3_app_irq+0xd4/0x12c() [ 6.894378] Modules linked in: [ 6.894409] Backtrace: [ 6.894409] [<c0012440>] (dump_backtrace+0x0/0x10c) from [<c02fb698>] (dump_stack+0x18/0x1c) [ 6.894439] r6:c002de58 r5:00000009 r4:00000000 r3:c0880180 [ 6.894470] [<c02fb680>] (dump_stack+0x0/0x1c) from [<c0039854>] (warn_slowpath_common+0x54/0x6c) [ 6.894500] [<c0039800>] (warn_slowpath_common+0x0/0x6c) from [<c0039890>] (warn_slowpath_null+0x24/0x2c) [ 6.894500] r8:0000000a r7:00000000 r6:f8001400 r5:00000000 r4:84001b00 [ 6.894500] r3:00000009 [ 6.894561] [<c003986c>] (warn_slowpath_null+0x0/0x2c) from [<c002de58>] (omap3_l3_app_irq+0xd4/0x12c) [ 6.894561] [<c002dd84>] (omap3_l3_app_irq+0x0/0x12c) from [<c008561c>] (handle_irq_event_percpu+0x54/0x19c) [ 6.894592] r7:00000000 r6:00000000 r5:c082c710 r4:ef072340 [ 6.894622] [<c00855c8>] (handle_irq_event_percpu+0x0/0x19c) from [<c00857c4>] (handle_irq_event+0x60/0x80) [ 6.894653] [<c0085764>] (handle_irq_event+0x0/0x80) from [<c0088300>] (handle_level_irq+0xb4/0x134) [ 6.894653] r5:c082c710 r4:c082c6c0 [ 6.894683] [<c008824c>] (handle_level_irq+0x0/0x134) from [<c0084e18>] (generic_handle_irq+0x2c/0x44) [ 6.894683] r6:ef02c000 r5:c0829014 r4:c0841e18 r3:c008824c [ 6.894744] [<c0084dec>] (generic_handle_irq+0x0/0x44) from [<c000f228>] (handle_IRQ+0x54/0xb8) [ 6.894744] [<c000f1d4>] (handle_IRQ+0x0/0xb8) from [<c000873c>] (omap3_intc_handle_irq+0x68/0x7c) [ 6.894775] r8:c08415cc r7:0000000a r6:c0898c38 r5:ef02de88 r4:fa200000 [ 6.894775] r3:00000000 [ 6.894805] [<c00086d4>] (omap3_intc_handle_irq+0x0/0x7c) from [<c0302e80>] (__irq_svc+0x40/0x54) [ 6.894836] Exception stack(0xef02de88 to 0xef02ded0) [ 6.894836] de80: f0048000 00000000 00007000 00000000 0000 3035 f004bfca [ 6.894866] dea0: 00000000 00000000 c08415cc c0898140 ef02c000 ef02def4 ef02 def8 ef02ded0 [ 6.894866] dec0: c042b1dc c0016efc 20000013 ffffffff [ 6.894897] r7:ef02debc r6:ffffffff r5:20000013 r4:c0016efc [ 6.894927] [<c0016ed0>] (_memset_io+0x0/0x50) from [<c042b1dc>] (omap_sram_init+0x228/0x56c) [ 6.894927] r8:c0445cf4 r7:c0417208 r6:c0898140 r5:c0899840 r4:c0899a3c [ 6.894927] r3:f004f000 [ 6.894989] [<c042afb4>] (omap_sram_init+0x0/0x56c) from [<c041f01c>] (omap_sdrc_init+0x18/0xb8) [ 6.894989] r6:c0898140 r5:c0899840 r4:c0899840 r3:0005e601 [ 6.895019] [<c041f004>] (omap_sdrc_init+0x0/0xb8) from [<c0427e38>] (rm680_init+0x34/0xc0) [ 6.895050] r5:c04518e0 r4:c0875da0 [ 6.895080] [<c0427e04>] (rm680_init+0x0/0xc0) from [<c0419934>] (customize_machine+0x24/0x30) [ 6.895080] r5:00000003 r4:00000000 [ 6.895111] [<c0419910>] (customize_machine+0x0/0x30) from [<c00088e0>] (do_one_initcall+0x11c/0x184) [ 6.895141] [<c00087c4>] (do_one_initcall+0x0/0x184) from [<c041799c>] (kernel_init+0x100/0x1c4) [ 6.895141] [<c041789c>] (kernel_init+0x0/0x1c4) from [<c003ef18>] (do_exit+0x0/0x794) [ 6.895172] ---[ end trace 1b75b31a271a0d00 ]--- This is repeated maybe a thousand times. While the root cause remains unknown (they seem to occur during SDRC and DMA init), the errors should be at least ratelimited so that user will also have chance to see other boot messages. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> --- arch/arm/mach-omap2/omap_l3_smx.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)