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powerpc/configs/64s: Enable CONFIG_PRINTK_CALLER
This adds the CPU or thread number to printk messages. This helps a lot when deciphering concurrent oopses that have been interleaved. Example output, of PID1 (T1) triggering a warning: [ 1.581678][ T1] WARNING: CPU: 0 PID: 1 at crypto/rsa-pkcs1pad.c:539 pkcs1pad_verify+0x38/0x140 [ 1.581681][ T1] Modules linked in: [ 1.581693][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.5.0-rc5-gcc-8.2.0-00121-gf84c2e595927-dirty #1515 [ 1.581700][ T1] NIP: c000000000207d64 LR: c000000000207d3c CTR: c000000000207d2c [ 1.581708][ T1] REGS: c0000000fd2e7560 TRAP: 0700 Not tainted (5.5.0-rc5-gcc-8.2.0-00121-gf84c2e595927-dirty) [ 1.581712][ T1] MSR: 9000000000029033 <SF,HV,EE,ME,IR,DR,RI,LE> CR: 44000222 XER: 00040000 Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200520121257.961112-1-mpe@ellerman.id.au
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3 changed files with 3 additions and 0 deletions
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@ -347,3 +347,4 @@ CONFIG_KVM_BOOK3S_64=m
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CONFIG_KVM_BOOK3S_64_HV=m
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CONFIG_VHOST_NET=m
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CONFIG_PRINTK_TIME=y
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CONFIG_PRINTK_CALLER=y
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@ -358,6 +358,7 @@ CONFIG_CRYPTO_DEV_NX=y
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CONFIG_CRYPTO_DEV_NX_ENCRYPT=m
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CONFIG_CRYPTO_DEV_VMX=y
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CONFIG_PRINTK_TIME=y
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CONFIG_PRINTK_CALLER=y
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CONFIG_MAGIC_SYSRQ=y
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CONFIG_DEBUG_KERNEL=y
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CONFIG_DEBUG_STACK_USAGE=y
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@ -322,3 +322,4 @@ CONFIG_KVM_BOOK3S_64=m
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CONFIG_KVM_BOOK3S_64_HV=m
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CONFIG_VHOST_NET=m
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CONFIG_PRINTK_TIME=y
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CONFIG_PRINTK_CALLER=y
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